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淀粉/膨润土接枝衣康酸-丙烯酰胺复合吸水剂配方优化研究 被引量:2
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作者 成青 胡自然 +1 位作者 莫平玲 岳哓秋 《现代化工》 CAS CSCD 北大核心 2011年第6期65-68,共4页
用过硫酸钾(KPS)作引发剂,通过水溶液聚合法制得了淀粉/膨润土接枝衣康酸(IA)和丙烯酰胺(AM)高吸水性树脂(SBPIAAM)。研究了衣康酸与丙烯酰胺用量比、衣康酸中和度、交联剂用量以及引发剂用量等对吸液性能的影响。其最佳反应条件为:丙... 用过硫酸钾(KPS)作引发剂,通过水溶液聚合法制得了淀粉/膨润土接枝衣康酸(IA)和丙烯酰胺(AM)高吸水性树脂(SBPIAAM)。研究了衣康酸与丙烯酰胺用量比、衣康酸中和度、交联剂用量以及引发剂用量等对吸液性能的影响。其最佳反应条件为:丙烯酰胺/衣康酸质量比为9.1∶0.9,衣康酸的中和度为70%,交联剂质量为单体质量的0.05%,作为引发剂的过硫酸钾的质量是单体质量的0.3%,反应温度为70℃,反应时间为6~10 h。 展开更多
关键词 复合吸水剂 淀粉 膨润土 衣康酸 丙烯酰胺
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用均匀设计法优化合成抗盐性复合吸水剂 被引量:1
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作者 刘永兵 蒲万芬 +2 位作者 胡琴 周明 赵金洲 《精细石油化工进展》 CAS 2004年第5期5-8,共4页
采用4因素6×2拟水平的均匀设计法合成了一种新的抗盐性吸水剂。通过指标与因素间的回归分析,得出单体配比和引发剂用量两个条件对该吸水剂吸盐率的影响显著。优化的合成条件是:单体丙烯酰胺(AM)和丙烯酸(AA)的质量配比为5.5~6.5,... 采用4因素6×2拟水平的均匀设计法合成了一种新的抗盐性吸水剂。通过指标与因素间的回归分析,得出单体配比和引发剂用量两个条件对该吸水剂吸盐率的影响显著。优化的合成条件是:单体丙烯酰胺(AM)和丙烯酸(AA)的质量配比为5.5~6.5,交联剂用量为0.04%~0.07%,引发剂用量为0.04%~0.06%,蒙脱土(MMT)含量为7%~8%;吸水剂在10%NaCl溶液中的吸盐率为70%~75%。 展开更多
关键词 复合吸水剂 均匀设计法 引发剂 丙烯酰胺 丙烯酸 蒙脱土 高分子材料 水剂
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凹土基有机-无机复合高吸水性材料的制备及性能研究 被引量:3
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作者 唐文剑 王林 +2 位作者 赵振 张敏 李荣清 《广东化工》 CAS 2012年第2期53-54,共2页
应用水溶液聚合法,以丙烯酰胺和未纯化凹凸棒原土为原料制备了丙烯酰胺/凹凸棒土复合吸水性材料,考察了凹凸棒原土含量、交联剂含量和引发剂含量对复合吸水材料吸水性能的影响,并对制备条件进行了优化。结果表明当凹凸棒原土质量分数为1... 应用水溶液聚合法,以丙烯酰胺和未纯化凹凸棒原土为原料制备了丙烯酰胺/凹凸棒土复合吸水性材料,考察了凹凸棒原土含量、交联剂含量和引发剂含量对复合吸水材料吸水性能的影响,并对制备条件进行了优化。结果表明当凹凸棒原土质量分数为10%,交联剂质量分数为0.06%,引发剂质量分数为0.4%时,复合吸水材料在蒸馏水中的吸水倍率最高,达到了719 g/g。 展开更多
关键词 凹凸棒土 丙烯酰胺 复合吸水剂
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Design of Heat Pipe Type Adsorption Ice Maker for Fishing Boats 被引量:1
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作者 王丽伟 王如竹 +1 位作者 夏再忠 吴静怡 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2005年第3期403-410,共8页
A heat pipe type adsorption ice maker with two adsorbers for fishing boats is designed by using ammonia as refrigerant and compound of activated carbon-CaCl2 as adsorbent. This type of heat pipe adsorber can solve the... A heat pipe type adsorption ice maker with two adsorbers for fishing boats is designed by using ammonia as refrigerant and compound of activated carbon-CaCl2 as adsorbent. This type of heat pipe adsorber can solve the problem of incompatibility between ammonia, copper, seawater and steel. The working process of the ice maker with 8.7kg adsorbent per bed is simulated. The results show that the optimal semi-cycle time is about 9 min at the evaporating temperature of -15℃, where the corresponding cooling power, specific cooling power per kilogram adsorbent SCP and coefficient of refrigerant performance COP are respectively 3.6kW, 217W·kg-1 and 0.404. 展开更多
关键词 ADSORPTION ice maker heat pipe AMMONIA seawater compound adsorbent
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Adsorption of Chromium (Ⅵ) from Aqueous Solution Using Zeolite/Chitosan Hybrid Composite 被引量:2
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作者 Meiling Pang Naoki Kano Hiroshi Imaizumi 《Journal of Chemistry and Chemical Engineering》 2015年第7期433-441,共9页
This study investigated the adsorption ability of ZCHC (zeolite/chitosan hybrid composite) as adsorbent for chromium (Cr(Ⅵ)), ZCHC was prepared with sol-gel method by mixing zeolite and chitosan. Adsorption exp... This study investigated the adsorption ability of ZCHC (zeolite/chitosan hybrid composite) as adsorbent for chromium (Cr(Ⅵ)), ZCHC was prepared with sol-gel method by mixing zeolite and chitosan. Adsorption experiment from aqueous solutions containing known amount of Cr(Ⅵ) using zeolite, chitosan and ZCHC was explored to evaluate the efficiency of ZCHC as adsorbent for Cr in a batch system. The amount of Cr(Ⅵ) adsorbed at different pH values, initial concentrations, adsorbent dosages, and contact times were determined by ICP-AES (inductively coupled plasma-atomic emission spectrometry) in order to determine the optimum conditions for Cr(Ⅵ) adsorption. Furthermore, the adsorption mechanism of Cr(Ⅵ) by zeolite, chitosan and ZCHC was investigated by applying Langmuir and Freundlich isotherm equations to the data obtained. In addition, the rates of adsorption were found to conform to pseudo-second order kinetics. 展开更多
关键词 ADSORPTION CHROMIUM ZEOLITE CHITOSAN hybrid composite adsorption isotherms kinetics.
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Ethanol-Water Near-Azeotropic Mixture Dehydration by Compound Starch-Based Adsorbent 被引量:1
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作者 孙津生 师明 王文平 《Transactions of Tianjin University》 EI CAS 2015年第5期427-432,共6页
Ethanol-water near-azeotropic mixture dehydration was investigated by formulated compound starchbased adsorbent(CSA), which consists of corn, sweet potato and foaming agent. The net retention time and separation facto... Ethanol-water near-azeotropic mixture dehydration was investigated by formulated compound starchbased adsorbent(CSA), which consists of corn, sweet potato and foaming agent. The net retention time and separation factor of water over ethanol were measured by inverse gas chromatography(IGC). Results indicated that water has a longer net retention time than ethanol and that low temperature is beneficial to this dehydration process. Orthogonal test was conducted under different vapor feed flow rates, bed temperatures and bed heights, to obtain optimal fixed-bed dehydration condition. Dynamic saturated adsorbance was also studied. It was found that CSA has the same water adsorption capacity(0.15 g/g)as some commercial molecular sieves. Besides, this biosorptive dehydration process was found to be the most energy-efficient compared with other ethanol purification processes. 展开更多
关键词 starch-based adsorbent adsorption ethanol-water near-azeotropic mixture DEHYDRATION
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A Novel Method for the Fabrication of Granular Hydroxyapatite-bentonite Composite Adsorbents for the Removal of Pb2+ from an Aqueous Solution
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作者 ThiMinh Hieu Do Pham ThanhThao Tran AnhKhoaTon Minh Vien Le 《Journal of Environmental Science and Engineering(B)》 2016年第7期371-378,共8页
Granular HApB composite adsorbents, with dimensions of 4 mm × 4 mm, were prepared for the removal of lead from an aqueous solution. The effectiveness of the composites for Pb2+ removal from an aqueous solution w... Granular HApB composite adsorbents, with dimensions of 4 mm × 4 mm, were prepared for the removal of lead from an aqueous solution. The effectiveness of the composites for Pb2+ removal from an aqueous solution with different initial concentrations, adsorbent doses and reaction times were examined. The Langmuir isotherms, Freundlich isotherm models and pseudo-second order kinetic model were used in this analysis. It was found that the Langmuir model fitted the experimental data better than the Freundlich model, with a maximum adsorption capacity of 93.37 mg.g-1. The pseudo-second order kinetic model also fit the experiment data well with an adsorption capacity of 70.73 mg.g-1 after being reused for 3 times. Furthermore, the composites may possibly be used in processes for industrial water treatment. 展开更多
关键词 Environment AFFORESTATION poplar plantations timber marketing.
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Poly(amidoxime)-reduced graphene oxide composites as adsorbents for the enrichment of uranium from seawater 被引量:10
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作者 SHAO DaDong LI JiaXing WANG XiangKe 《Science China Chemistry》 SCIE EI CAS 2014年第11期1449-1458,共10页
The development of efficient materials for high extraction of uranium(UO22+) from seawater is critical for nuclear energy. Poly(amidoxime)-reduced graphene oxide(PAO/rGO) composites with excellent adsorption capabilit... The development of efficient materials for high extraction of uranium(UO22+) from seawater is critical for nuclear energy. Poly(amidoxime)-reduced graphene oxide(PAO/rGO) composites with excellent adsorption capability for UO22+ were synthesized by in situ polymerization of acrylonitrile monomers on GO surfaces, followed by amidoximation treatment with hydroxylamine. The adsorption capacities of PAO/rGO composites for UO22+ reached as high as 872 mg/g at pH 4.0. The excellent tolerance of these composites for high salinity and their regeneration-reuse properties can be applied in the nuclear-fuel industry by high extraction of trace UO22+ ions from seawater. 展开更多
关键词 URANIUM AMIDOXIME GRAPHENE ACRYLONITRILE ADSORPTION
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Polymer-coated nanoporous carbons for trace seawater uranium adsorption 被引量:11
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作者 YUE YanFeng SUN XiaoGuang +7 位作者 MAYES Richard T. KIM Jungseung FULVIO Pasquale F. QIAO ZhenAn BROWN Suree TSOURIS Costas OYOLA Yatsandra DAI Sheng 《Science China Chemistry》 SCIE EI CAS 2013年第11期1510-1515,共6页
Polymer-coated mesoporous carbon nanocomposites were prepared from the immobilization of acrylonitrile and acrylic acid copolymers with divinylbenzene as a crosslinker onto a mesoporous carbon framework.High surface a... Polymer-coated mesoporous carbon nanocomposites were prepared from the immobilization of acrylonitrile and acrylic acid copolymers with divinylbenzene as a crosslinker onto a mesoporous carbon framework.High surface areas were maintained after polymerization with accessible porosity.This functional nanocomposite was tested as an adsorbent for uranium from high salinity solutions.Uranium adsorption results have shown that the adsorption capacities are strongly influenced by the density of the amidoxime groups and the specific surface area. 展开更多
关键词 mesoporous carbon NANOCOMPOSITE COPOLYMERIZATION seawater uranium adsorption
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