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Preparation of Tartary Buckwheat Seed Coating Agent and Its Effect on Germination
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作者 Xin Zou Jieyu Zhang +6 位作者 Ting Cheng Yangyang Guo Xiao Han Han Liu Yuxing Qin Jie Li Dabing Xiang 《Phyton-International Journal of Experimental Botany》 SCIE 2024年第4期699-712,共14页
To mitigate the wastage of seed resources and reduce the usage of pesticides and fertilizers, seed coating agentshave gained popularity. This study employs single-factor and multi-index orthogonal experimental design ... To mitigate the wastage of seed resources and reduce the usage of pesticides and fertilizers, seed coating agentshave gained popularity. This study employs single-factor and multi-index orthogonal experimental design methodsto investigate the seed coating formula and physical properties of Tartary buckwheat. The specific effects ofeach component on Tartary buckwheat seed germination are analyzed. The findings reveal that the seed coatingagent formulated with 1.5% polyvinyl alcohol, 0.15% sodium alginate, 0.2% op-10, 0.1% polyacrylamide, 8% colorant,3% ammonium sulfate, 1% potassium dihydrogen phosphate, and 0.15% carbendazim exhibits the mosteffective coating. It demonstrates optimal physical properties and promotes seed germination efficiently. The suspensionrate of this seed coating agent reaches 91.12%, with a mere 2.13% coating shedding rate and 2.5% coatingseed rot rate. Furthermore, it achieves a germination percentage of 99.17%, which is 20.84% higher than the lowestgroup. The germination potential and index are also significantly higher than the lowest group, with anincrease of 20.84% and 26.56%, respectively. Additionally, the vitality index is 553.08, a 15.75% increase comparedto the lowest group. The application of seed coating agents helps reduce seed resource loss, increase plant numbers,and ultimately enhance agricultural yields. This finding holds practical significance in agriculturalproduction. 展开更多
关键词 Tartary buckwheat seed coating agent FORMULA GERMINATION
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Effect of Trace Elements in Seed Coating Agent on Peanut Growth 被引量:1
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作者 谢文娟 曾德芳 +1 位作者 赵会方 邓清香 《Agricultural Science & Technology》 CAS 2013年第6期922-924,936,共4页
[Objective] This study aimed to investigate the effect of trace elements in peanut seed coating agent. [Method] Different concentrations of trace elements Fe and B were added into peanut coating agent, then the germin... [Objective] This study aimed to investigate the effect of trace elements in peanut seed coating agent. [Method] Different concentrations of trace elements Fe and B were added into peanut coating agent, then the germination rate and plant height of the seeds treated by different agents were measured to decide the best formula. [Result] The germination rate and plant height of the seeds treated with seed coating agent was obviously increased. Adding trace elements Fe and B could increase the peanut yield, and 1.5% Fe and 1% B gave the best result. [Conclusion] This study will provide reference for modifying the seed coating agent formula. 展开更多
关键词 Trace elements Peanut seed coating agent Yield improvement
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Physicochemical Property Testing of a Novel Maize Seed Coating Agent and Its Antibacterial Mechanism Research 被引量:8
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作者 Qingxiang Deng Defang Zeng 《Open Journal of Soil Science》 2015年第2期45-52,共8页
We used the no pollution natural polymer polysaccharide chitosan as the main raw material, which is supplemented by other additives, to prepare a high-efficiency environmental friendly maize seed coating agent. By det... We used the no pollution natural polymer polysaccharide chitosan as the main raw material, which is supplemented by other additives, to prepare a high-efficiency environmental friendly maize seed coating agent. By detecting the seed quality, maize seedling indexes, which include root activity, chlorophyll content and malondialdehyde (MDA) content, and through the results we found that this seed coating agent could improve the photosynthetic capacity and enhance seedling resistance. Laboratory bacteriostasis test and study showed that the antibacterial rate of this seed coating agent has reached more than 88%. Meanwhile, we analyzed and studied the antimicrobial mechanism of the seed coating agent. 展开更多
关键词 MAIZE SEED coating agent ANTIBACTERIAL Mechanism Analysis
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Preparation of a Novel Highly Effective and Environmental Friendly Wheat Seed Coating Agent 被引量:3
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作者 ZENG De-fang WANG Hong 《Agricultural Sciences in China》 CAS CSCD 2010年第7期937-941,共5页
A novel environmental friendly wheat seed coating agent was prepared from the natural polymer,biological pesticide,microfertilizer,microelements and other additives.The laboratory and field test results showed that it... A novel environmental friendly wheat seed coating agent was prepared from the natural polymer,biological pesticide,microfertilizer,microelements and other additives.The laboratory and field test results showed that it could enhance the yield up to 16% and reduce its input cost to 1/6 as compared with the conventional wheat seed coating agent.It is safe without causing any pollution and would have significant economic and environmental benefits. 展开更多
关键词 wheat seed coating agent POLYSACCHARIDE sprouting tendency germination rate bacteriostatic ratio field experiment
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Study on a new nano-dispersing agent and its effect for increasing suspension ability of alcohol-based coatings 被引量:1
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作者 S.P.Li X.C.Du +2 位作者 H.Z.Song L.Li J.Y.Zhou 《China Foundry》 SCIE CAS 2004年第S1期54-57,共4页
A study for further improving the suspension rate of alcohol-based coatings using a new nano-dispersing agent has been presented in this paper. The results of experiments show that the new nano-dispersing agent should... A study for further improving the suspension rate of alcohol-based coatings using a new nano-dispersing agent has been presented in this paper. The results of experiments show that the new nano-dispersing agent should be used in combination with organic auxiliary agent which significantly increases the suspension effect of alcohol-based coatings. By the methods, the suspension rates of 99%, 98%, 96% and 94% can be achieved at 2h, 2h, 48h and 72h, respectively. These alcohol-based coatings have characters of higher strength, lower gas evolution, better brush ability and no blister after ignition. 展开更多
关键词 alcohol-based coating nano-dispersing agent SUSPENSION ABILITY organic auxiliary agent
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Structure, properties and application to water-soluble coatings of complex antimicrobial agent Ag-carboxymethyl chitosan-thiabendazole 被引量:5
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作者 夏金兰 王春 +2 位作者 聂珍瑗 彭安安 管昕 《Journal of Central South University of Technology》 EI 2005年第5期526-530,共5页
The structure, properties and application to water-soluble coatings of a new complex antimicrobial agent Ag-carboxylmethyl citosan-thiabendazole (Ag-CMCTS-TBZ) prepared from different materiel ratios were reported. ... The structure, properties and application to water-soluble coatings of a new complex antimicrobial agent Ag-carboxylmethyl citosan-thiabendazole (Ag-CMCTS-TBZ) prepared from different materiel ratios were reported. The silver ions were preferably coordinated with the free-NH2 groups and the -OH groups of secondary alcohol and carboxyl in CMCTS. TBZ preferably bonded to carboxyl group in CMCTS by electrostatic force and hydrogen bonding. Increase in silver ions content in the complex agent improved to some limited extent the antibacterial activity, but enhanced coloring and cost of the complex agent. Increase in TBZ content resulted in increase of antifungal activity, but decrease of water solubility of the complex agent. The antimicrobial MICs of the complex agent to Esherichia coil, Staphylococcus aureus, Candida albicans, Aspergillus niger, Mucor sp. were 20 -80, 15 -60, 20 - 55, 40 - 250, and 400 - 1700 mg/kg, respectively. Addition of 0.1% of this complex agent to acrylic emulsion paint made the paint without substantial change in color, luster, viscosity, odor or pH value, but with an excellent and chronically persisting broad-spectra antimicrobial activity. 展开更多
关键词 complex antimicrobial agent carboxylmethyl chitosan silver THIABENDAZOLE water-based acrylic emulsion paint water-soluble antimicrobial coating
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Influence of Different Chelating Agents on Corrosion Performance of Microstructured Hydroxyapatite Coatings on AZ91D Magnesium Alloy 被引量:1
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作者 赵丹丹 孙瑞雪 CHEN Kezheng 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第1期179-185,共7页
To improve the bioactivity and corrosion resistance of AZ91 D magnesium alloy,hydroxyapatite(HAp) coatings with novel microstructured morphologies were prepared successfully on AZ91 D substrates via a facile hydroth... To improve the bioactivity and corrosion resistance of AZ91 D magnesium alloy,hydroxyapatite(HAp) coatings with novel microstructured morphologies were prepared successfully on AZ91 D substrates via a facile hydrothermal method.Different chelating agents including polyaspartic acid(PASP) and ethylenediaminetetraacetic acid(EDTA) were introduced to investigate their effects on the morphology and corrosion resistance of the coated magnesium alloys.The results revealed that the coating prepared with PASP was composed of many uniform urchin-like microspheres,while the coating prepared with EDTA consisted of many flower-like particles.Moreover,the crystallinity of the coating prepared with EDTA was much higher than that of the coating prepared with PASP.Electrochemical tests revealed that the corrosion resistance of the substrate was significantly improved after being coated with each coating.Immersion test of the coated samples in simulated body fluid(SBF) demonstrated that the coatings could be biodegraded gradually and induce the formation of calcium phosphate particles. 展开更多
关键词 magnesium alloy hydroxyapatite coating chelating agent corrosion resistance
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Preparation of a Novel Environmental Soybean Seed Coating Agent 被引量:1
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作者 Wenjin Wang Defang Zeng 《Journal of Agricultural Chemistry and Environment》 2018年第3期133-142,共10页
In the study, a novel environmental soybean seed coating agent was made of natural polymer, trace elements, trace fertilizer and biopesticides etc., with the condition of high performance-to-price ratio and environmen... In the study, a novel environmental soybean seed coating agent was made of natural polymer, trace elements, trace fertilizer and biopesticides etc., with the condition of high performance-to-price ratio and environmental friendliness. Effects of this soybean seed coating agent on soybean yield were tested through the laboratory and farm experiments. The tested results showed that the soybean yield using this seed coating agent was increased by 15.46%, and its cost was decreased by 27.8%, compared with the conventional soybean seed coating agent. It’s nontoxic and harmless to human and animals, more friendly to the environment. So it has obvious economic and environmental benefits. 展开更多
关键词 Environmental FRIENDLINESS SOYBEAN SEED coating agent GERMINATION TENDENCY GERMINATION PERCENTAGE
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Effect and Mechanism of Cold Tolerant Seed-Coating Agents on the Cold Tolerance of Early Indica Rice Seedlings 被引量:13
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作者 ZHANG Hai-qing ZOU Ying-bin XIAO Guo-chao XIONG Yuan-fu 《Agricultural Sciences in China》 CAS CSCD 2007年第7期792-801,共10页
To better understand the effect and mechanism of cold tolerant seed-coating agents on the cold tolerance of rice seedlings, the physiological and biochemical effects of four cold tolerant seed-coating agents (HET, YK... To better understand the effect and mechanism of cold tolerant seed-coating agents on the cold tolerance of rice seedlings, the physiological and biochemical effects of four cold tolerant seed-coating agents (HET, YKJ, YKZYJ, and the ABA seed coating agents) on two early indica rice varieties were studied under chilling stress. The results showed that the rice seedlings treated with cold tolerant seed-coating agents under chilling stress maintained dramatically higher root vigor, POD, CAT and SOD activities, and chlorophyll content, had lower MDA content and electrolyte leakage, and accumulated more soluble sugar and free proline, when compared with the control without the treatment, and finally showed lower plant injury rate. It was indicated that the cold tolerant seed coating agent improved the ability of rice seedlings in resisting to chilling stress. YKZYJ was ranked the first in terms of the efficiency in cold tolerance among the four cold tolerant seed-coating agents tested. 展开更多
关键词 RICE cold tolerant seed-coating agent chilling stress physiology and biochemistry mechanism of cold tolerance
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PREPARATION AND PROPERTIES OF THERMOSETTING ACRYLIC COATINGS USING TITANIUM-OXO-CLUSTER AS A CURING AGENT
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作者 周树学 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2009年第3期351-358,共8页
Thermosetting acrylic coatings were prepared by using carboxyl acid group-containing acrylic oligomer and curing with titanium-oxo-clusters which were first pre-hydrolyzed from titanium n-butoxide.The curing ability o... Thermosetting acrylic coatings were prepared by using carboxyl acid group-containing acrylic oligomer and curing with titanium-oxo-clusters which were first pre-hydrolyzed from titanium n-butoxide.The curing ability of the titanium-oxo-cluster was examined using a microdielectric analytical(DEA)curing monitor,Fourier transformed infrared spectroscopy(FTIR),and Soxhlet extraction experiments,and the properties of the resulted coatings were investigated with pendulum hardness tester,dynamic mechanical analysis(DMA),thermogravimetric analysis(TGA)and ultraviolet-visible spectrometer.The effect of titania-oxo-cluster in leading acrylic oligomers to form thermosetting acrylic coatings was confirmed.An increasing pendulum hardness and modulus of acrylic coatings with increasing titania content was observed, which resulted from the increment of crosslinking degree rather than of the titania content.The thermosetting acrylic/titania coatings also showed better thermal stability and higher UV-blocking properties than those coatings using organic curing agent. 展开更多
关键词 Acrylic resin TITANIA Thermosetting coating Curing agent
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Activity test and mechanism study of an environmentally friendly wheat seed coating agent
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作者 Defang Zeng Huifang Zhao 《Agricultural Sciences》 2013年第7期334-339,共6页
This novel environmentally friendly wheat seed coating agent which has been made with natural polymer as the primary material could increase yield by about 9% compared with the conventionally virulent wheat seed coati... This novel environmentally friendly wheat seed coating agent which has been made with natural polymer as the primary material could increase yield by about 9% compared with the conventionally virulent wheat seed coating agent. In the premise of this production, the content of malondialdehyde (MDA) and peroxidase (POD) was determined. The results show that, after treated by the self-made wheat seed coating agent, the contents of the MDA were less than traditional group and the blank control group and POD contents were higher than traditional group and blank control group, this provides a good foundation on the further research of self-control wheat seed coating agent. 展开更多
关键词 WHEAT SEED coating agent INCREASE WHEAT YIELD Environmentally Friendly MDA POD
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THE ROLE OF RARE EARTH CHLORIDES IN THE PACK-TiC COATING AGENT
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作者 刘景科 金满 +1 位作者 李建忱 江中浩 《Journal of Rare Earths》 SCIE EI CAS CSCD 1990年第4期275-280,共6页
If 1% rare earth chloride is added to the coating agent containing 5% AlCl_3,the coating efficiency of TiC will be increased greatly.A protective crust consisting of Al_2(SiO_3)_3 and SiO_2 will form on top of the coa... If 1% rare earth chloride is added to the coating agent containing 5% AlCl_3,the coating efficiency of TiC will be increased greatly.A protective crust consisting of Al_2(SiO_3)_3 and SiO_2 will form on top of the coating agent in the temperature range of 850~1000℃ when SiO_2 powder of a thickness of 5~10 mm is spread on top of it.The protective crust can offer a good air-proof property and increase the denseness of the coating structure. 展开更多
关键词 AIC THE ROLE OF RARE EARTH CHLORIDES IN THE PACK-TiC coating agent TIC REC
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Effects of Different Seed Coating Agents on the Quality of"Grey-matter"Hybrid Rice Seeds
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作者 Yuan YUAN Manzhuo TANG +7 位作者 Hanyu NING Lianghui JIANG Chunxia LU Yan WANG Chenzhong JIN Jie PENG Xinhua KUANG Yihong HU 《Agricultural Biotechnology》 CAS 2023年第3期119-124,共6页
[Objectives]This study was conducted to select suitable mixed seed coating agents for improving the quality of"grey-matter"hybrid rice seeds.[Methods]Three different mixed seed coating agents(A,B,C)were used... [Objectives]This study was conducted to select suitable mixed seed coating agents for improving the quality of"grey-matter"hybrid rice seeds.[Methods]Three different mixed seed coating agents(A,B,C)were used to coat the seeds of two varieties(Taiyou 390 and Zhenliangyou 8612)of hybrid rice with different"grey-matter"content(5%,15%,25%),and the results were investigated and compared.[Results]The combinations of treatment B(seed coating agent A+Linong)and treatment C(Manshijin+seed coating agent A)could significantly improve indexes including seed germination potential,germination rate,seed vigor,seedling height,fibrous roots and fresh weight of the two varieties with a"grey-matter"content greater than 15%,but had no significant effects on main root length,dry weight,leaf number and tiller number,and the effects of treatment B was better than those of treatment C.That is to say,mixed seed coating agent B(seed coating agent A+Linong)was suitable for use as a seed coating agent to improve the quality of"grey-matter"seeds.[Conclusions]This study provides a reference plan for the safe use of mixed seed batches with"grey-matter"deterioration. 展开更多
关键词 Hybrid rice Grey-matter seed Seed coating agent Seed vigor Seedling quality
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Molecular Dynamic Simulation on the Absorbing Process of Isolating and Coating of α-olefin Drag Reducing Polymer 被引量:1
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作者 李冰 盛翔 +6 位作者 邢文国 董桂霖 刘永军 张长桥 陈祥俊 周宁宁 秦占波 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2010年第6期630-636,745,共8页
The absorbing process in isolating and coating process of α-olefin drag reducing polymer was studied by molecular dynamic simulation method, on basis of coating theory of α-olefin drag reducing polymer particles wit... The absorbing process in isolating and coating process of α-olefin drag reducing polymer was studied by molecular dynamic simulation method, on basis of coating theory of α-olefin drag reducing polymer particles with polyurethane as coating material. The distributions of sodium laurate, sodium dodeeyl sulfate, and sodium dodeeyl benzene sulfonate on the surface of α-olefin drag reducing polymer particles were almost the same, but the bending degrees of them were obviously different. The bending degree of SLA molecules was greater than those of the other two surfactant molecules. Simulation results of absorbing and accumulating structure showed that, though hydrophobie properties of surfactant molecules were almost the same, water density around long chain sulfonate sodium was bigger than that around alkyl sulfate sodium. This property goes against useful absorbing and accumulating on the surface of α-olefin drag reducing polymer particles; simulation results of interactions of different surfactant and multiple hydroxyl compounds on surface of particles showed that, interactions of different surfaetant and one kind of multiple hydroxyl compound were similar to those of one kind of surfaetant and different multiple hydroxyl compounds. These two contrast types of interactions also exhibited the differences of absorbing distribution and closing degrees to surface of particles. The sequence of closing degrees was derived from simulation; control step of addition polymerization interaction in coating process was absorbing mass transfer process, so the more closed to surface of particle the multiple hydroxyl compounds were, the easier interactions With isoeyanate were. Simulation results represented the compatibility relationship between surfactant and multiple hydroxyl compounds. The isolating and coating processes of α-olefin drag reducing polymer were further understood on molecule and atom level through above simulation research, and based on the simulation, a referenced theoretical basis was provided for practical optimal selection and experimental preparation of α-olefin drag reducing polymer particles suspension isolation agent. 展开更多
关键词 Molecular dynamic simulation coating process Multiple hydroxyl compound Addition polymerization Optimal selection Isolation agent
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Preparation of Silica Powder in Epoxy Resin Wear-Resistant Coating 被引量:2
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作者 Dongdong Zhang Jihu Wang +3 位作者 Shaoguo Wen Pengzhu Wang Changle Yin Zhongyan Du 《Advances in Materials Physics and Chemistry》 2015年第2期60-66,共7页
Silicon powders possess good thermal stability and rub resistance and can be used as the filler of high temperature wear-resistant coating;it can possess good wettability and dispersibility in the organic polymer by s... Silicon powders possess good thermal stability and rub resistance and can be used as the filler of high temperature wear-resistant coating;it can possess good wettability and dispersibility in the organic polymer by surface modification of silane coupling agent. Organic silicon has good thermal stability, which can modify the frangibility and thermal stability of epoxy resin. A certain proportion of modified silica powder, curing agent and additives were dispersed to modified epoxy resin can compound wear-resistant coating. The results show that: the modification effect can be the best if the dosage of silane coupling agent is 1.5% of silicon powder. If the methyl triethoxy silane is 50 phr and modified silica powder is 200 phr, then various performances of coating tend to be the best. 展开更多
关键词 SILANE Coupling agent SILICON POWDER EPOXY RESIN Organic SILICON coating
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Optimization of Ionic Liquid Film Deposition by Spin and Dip Coating Techniques 被引量:1
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作者 Joao Pedro Oliveira Cesar Tonicha Laia Luis Cobra Branco 《材料科学与工程(中英文B版)》 2012年第8期437-441,共5页
关键词 薄膜沉积技术 表征技术 离子液体 浸涂 优化 自旋 材料科学 实验条件
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Developing single-atom catalyst-based epoxy coating with active nanocatalytic anticorrosion performance in oxygen environment
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作者 Meng Cheng Yu-Qi Liu +4 位作者 Hao Jiang Jun-Hao Liu Chun-Ling Li Shuang-Qing Sun Song-Qing Hu 《Petroleum Science》 SCIE EI CSCD 2023年第5期3251-3263,共13页
The stimuli-responsive anticorrosion coatings have drawn great attention as a prospective corrosion protection approach due to their smart self-repairing properties.In contrast to passive protection mechanism based on... The stimuli-responsive anticorrosion coatings have drawn great attention as a prospective corrosion protection approach due to their smart self-repairing properties.In contrast to passive protection mechanism based on post-corrosion microenvironmental changes,a unique active protection strategy based on nanocatalytic oxygen depletion is proposed in this work to inhibit the occurrence of corrosion.Porous FeeNeC catalysts with outstanding oxygen reduction reaction(ORR)activity(half-wave potential of 0.89 V)is firstly synthesized through pre-coordination with organosilane precursor to obtain homogeneously distributed active sites.When this catalyst is introduced into the coating matrix,uniformly distributed FeeNeC not only compensates the defects but plays a crucial role in adsorption and consumption of diffused oxygen in the coating.Under this dual action,the penetration of corrosive medium,especially oxygen,through coating to metal substrate is greatly suppressed,resulting in effective corrosion inhibition and a significant increase in corrosion resistance of the composite coating compared to pure epoxy coating.This work provides a new perspective and the starting point for the design of high-performance smart coating with active anticorrosion properties. 展开更多
关键词 Nanocatalytic anticorrosion Pre-constrained metal ions Single-atom FeeNeC Deoxygenation agent Smart coatings
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New Nano Polymer Materials for Composite Exterior-Wall Coatings
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作者 Yue Yu 《Fluid Dynamics & Materials Processing》 EI 2023年第10期2681-2694,共14页
A triethylenetetramine epoxy mixture was synthesized through the reaction of a low-molecular-weight liquid epoxy resin with triethylenetetramine(TETA).Then triethyltetramine(TETA)was injected dropwise into a pro-pylen... A triethylenetetramine epoxy mixture was synthesized through the reaction of a low-molecular-weight liquid epoxy resin with triethylenetetramine(TETA).Then triethyltetramine(TETA)was injected dropwise into a pro-pylene glycol methyl ether(PM)solution for chain extension reaction.A hydrophilic andflexible polyether seg-ment was introduced into the hardener molecule.The effects of TETA/DGEPG,reaction temperature and reaction time on the epoxy conversion of polyethylene glycol diglycidyl ether(DGEPG)were studied.In addition,several alternate strategies to add epoxy resin to the high-speed dispersion machine and synthesize MEA DGEBA adduct(without catalyst and with bisphenol A diglycidyl ether epoxy resin)were compared.It was found that the higher the molecular weight of triethylenetetramine,the longer the chain segment of the surface active molecule.When the equivalence ratio of amine hydrogen and epoxy group is low,the stability of lotion is good.When the ratio of amine hydrogen to epoxy group is large,the content of triethylenetetramine is small.The main objective of this study is the provision of new data and knowledge for the development of new materials in the coating and electronic industry. 展开更多
关键词 Water-based coating triethylenetetramine(TETA) surface active agent nano polymer materials TRIETHYLENETETRAMINE
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LDH sealing for PEO coated friction stir welded AZ31/AA5754 materials
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作者 Tatsiana Shulha Maria Serdechnova +4 位作者 Ting Wu Thymoty Naacke Gert Wiese Carsten Blawert Mikhail L.Zheludkevich 《Nano Materials Science》 EI CAS CSCD 2024年第4期428-442,共15页
The need to combine various metals in light-weight constructions requires the development of coatings that prevent galvanic corrosion.Layered double hydroxides(LDHs)can be an example of such coatings,which were previo... The need to combine various metals in light-weight constructions requires the development of coatings that prevent galvanic corrosion.Layered double hydroxides(LDHs)can be an example of such coatings,which were previously successfully obtained in situ on individual materials.In addition,the possibility of LDH growth(including LDH growth in the presence of chelating agents)on the surface of plasma electrolytic oxidation(PEO)-coated metals was previously shown.This PEO+LDH combination could improve both corrosion and mechanical characteristics of the system.The possibility of LDHs formation in situ on the surface of PEO-coated friction stir welded(FSW)magnesium-aluminum materials(AZ31/AA5754 system was selected as a model one)was demonstrated in the presence of 1,3-diamino-2-hydroxypropane-N,N,N',N'-tetraacetic acid(DHPTA)as a chelating agent,which was selected based on analysis of respective metal-ligand compounds stability.LDHs growth was achieved under ambient pressure without addition of carbonates in the electrolyte.The effectiveness of the resulting coating is shown both for corrosion resistance and hardness. 展开更多
关键词 Layered double hydroxides(LDHs) Plasma electrolytic oxidation(PEO) Chelating agent Welded magnesium-aluminum materials Functional coatings
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Synthesis of Ionic and Non-Ionic Modified Waterborne Polyurethane Curing Agent
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作者 Ying Qiao Xu-dong Zhang 《Journal of Electronic Research and Application》 2024年第1期86-92,共7页
By using HDI and TMP as the main raw materials,polyethylene glycol 400(PEG400)is used as a non-ionic hydrophilic modifier,and sodium hydroxyethyl sulfonate is used as an ionic hydrophilic modifier to synthesize a dual... By using HDI and TMP as the main raw materials,polyethylene glycol 400(PEG400)is used as a non-ionic hydrophilic modifier,and sodium hydroxyethyl sulfonate is used as an ionic hydrophilic modifier to synthesize a dual hydrophilic modified polyurethane curing agent.Research revealed that introducing PEG400 for hydrophilic chain segments and sodium hydroxyethyl sulfonate for hydrophilic ionic groups in the polyurethane curing agent component leads to a uniform distribution of hydrophilic components,significantly enhancing compatibility with the aqueous polyol component,and results in excellent film performance.The synthesis process and film were characterized using Fourier transform infrared spectroscopy and high-resolution scanning electron microscopy in the study. 展开更多
关键词 coating Water polyurethane Curing agent Two-package Double modification
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