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Effect of Polyethylene Terephthalate Plastic Waste on the Physico-Mechanical and Thermal Characteristics of Stabilized Laterite Bricks
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作者 Aboubacar Sidiki Toure Moussa Tamboura +4 位作者 Antoine Padou Diarra Adama Coulibaly Dodo Kayentao Kélétigui Daou Mah Fatoumata Traore 《Open Journal of Applied Sciences》 2023年第6期910-920,共11页
The present work investigated the effect of polyethylene terephthalate (PET) plastic waste on the physico-mechanical and thermal properties of cement-stabilized laterite bricks to see the durability of the modified br... The present work investigated the effect of polyethylene terephthalate (PET) plastic waste on the physico-mechanical and thermal properties of cement-stabilized laterite bricks to see the durability of the modified bricks (CSLB). Samples were formulated by mixing laterite, cement, and different percentages of PET (0%, 3%, 5%, and 7%) by volume. The bricks were produced using the M7MI Hydraform standard interlocking block and kept in the shade for a curing period of 28 days. The addition of 3% to 5% PET to the laterite stabilized with 10% cement results in a decrease in both dry and wet compressive strength, which is determined using the Controlab compression machine. However, the obtained results are in concordance with the standards. The thermal conductivity of CSLB, determined using the box method with the EI700 measurement cell, decreases as the PET content of the mixture increases. A decrease in bulk density from 1.67 to 1.58 g/cm<sup>3</sup> was observed. 展开更多
关键词 Plastic waste polyethylene Terephthalate Laterite Bricks Cement Stabilization Thermal Conductivity
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HDPE与木屑热等离子体共蒸汽气化研究
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作者 覃思源 楚楚 +1 位作者 王萍 马文超 《环境卫生工程》 2024年第5期67-76,共10页
以高密度聚乙烯(HDPE)和木屑为研究对象,结合热力学分析和实验研究,探究等离子体气化过程中输入功率、HDPE质量分数以及水碳比(S/C)3种工况参数对氢气产率、合成气组分、氯的产物分布等影响规律,并基于吉布斯最小自由能原理进行热力学... 以高密度聚乙烯(HDPE)和木屑为研究对象,结合热力学分析和实验研究,探究等离子体气化过程中输入功率、HDPE质量分数以及水碳比(S/C)3种工况参数对氢气产率、合成气组分、氯的产物分布等影响规律,并基于吉布斯最小自由能原理进行热力学计算。模拟分析表明:输入功率由7.5 kW增至34.0 kW过程中,氢气占比在20 kW(对应温度为800℃)时达到最大值59%;随着原料中HDPE质量分数由0增至100%,氢气占比由65%减少至56%;S/C为0时,氢气占比最高(80%),随着S/C由0增至3.0,氢气占比呈现不断减小的趋势;氯在气相中产物主要以KCl(g)、(KCl)_(2)(g)为主。实验研究表明:输入功率、HDPE质量分数和S/C对产氢量的影响趋势与热力学分析一致,在输入功率为22 kW、HDPE质量分数为80%、S/C为1.0时,最优产氢量分别达到1.52、1.51、1.38 m^(3)/kg。氯的气相占比分别在功率为22 kW、HDPE质量分数为20%、S/C为1.4时达到最高。通过对比实验结果验证了热力学模拟对等离子体气化产物特性进行定性定量分析的潜力,探索了采用热力学计算模拟生物质和HDPE等离子体共气化的可行性,并可为等离子体气化的操作优化和氯控制提供借鉴。 展开更多
关键词 等离子体气化 木屑 高密度聚乙烯(hdpe) 氯产物分析 热力学平衡
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Synthesis of Activated Carbon from Polyethylene Terephthalate(PET)Plastic Waste and Its Application for Removal of Organic Dyes from Water
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作者 Thu Hanh Thi Pham 《Non-Metallic Material Science》 2023年第1期27-37,共11页
Synthetic plastics are often considered to be materials that cannot be broken down by natural processes.One such plastic,polyethylene terephthalate(PET),is commonly used in everyday items but when these products are d... Synthetic plastics are often considered to be materials that cannot be broken down by natural processes.One such plastic,polyethylene terephthalate(PET),is commonly used in everyday items but when these products are discarded,they can cause serious harm to the environment and human health.In this study,PET plastic waste was used to create activated carbon using a physical activation process that involved using CO2 gas.The researchers investigated the effects of different temperatures,carbonization,and activation times on the resulting activated carbon’s surface area.The activated carbon was then analyzed using scanning electron microscopy(SEM),X-ray diffraction(XRD),FTIR,and BET.The activated carbon created from PET plastic waste showed excellent absorption properties for methylene blue in aqueous solutions across a wide range of pH levels.By creating activated carbon from plastic waste,not only are environmental issues addressed,but high-value activated carbon is produced for environmental remediation purposes. 展开更多
关键词 Plastic waste Environmental treatment Activated carbon waste utilization polyethylene terephthalate(PET)
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MOF synthesis using waste PET for applications of adsorption, catalysis and energy storage
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作者 Hongmei Li Jinming Lei +4 位作者 Liying Zhu Yanling Yao Yuanhua Li Tianhao Li Chuntian Qiu 《Green Energy & Environment》 SCIE EI CAS CSCD 2024年第11期1650-1665,共16页
Polyethylene terephthalate (PET) as one of non-degradable wastes has become a huge threat to the environment and human health.Chemical Recycle of PET is a sustainable way to release 1,4-benzenedicarboxylic acid (BDC) ... Polyethylene terephthalate (PET) as one of non-degradable wastes has become a huge threat to the environment and human health.Chemical Recycle of PET is a sustainable way to release 1,4-benzenedicarboxylic acid (BDC) the monomer of PET as common used organiclinker for synthesis of functional Metal–organic-frameworks (PET-derived MOFs) such as UiO-66, MIL-101, etc. This sustainable and costeffective“Waste-to-MOFs” model is of great significant to be intensively investigated in the past years. Attributes of substantial porosity, specificsurface area, exposed metal centers, uniform structure, and flexible morphology render PET-derived MOFs are well-suited for applications inadsorption, energy storage, catalysis, among others. Herein, in the present work, we have summarized recent advances in synthesis of PETderived MOFs using ex-situ and in-situ methods for typical applications of adsorption, catalysis and energy storage. Despite those improvementsin synthesis methods and potential applications, challenges still remain in development of green and economical routes to fully utilize waste PETfor massive manufacture of valuable MOF materials and chemicals. This review provides insights into the conversion of non-degradable PETwaste to value-added MOF materials, and further suggests promising perspectives to develop the sustainable “Waste-to-MOFs” model inaddressing environmental pollution and energy crises. 展开更多
关键词 Plastic waste polyethylene terephthalate Chemical recycle 1 4-benzenedicarboxylic acid Metal organic frameworks
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Multifunctional HDPE/Cu biocidal nanocomposites for MEX additive manufactured parts: Perspectives for the defense industry
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作者 Nectarios Vidakis Nikolaos Michailidis +7 位作者 Markos Petousis Nektarios K.Nasikas Vassilios Saltas Vassilis Papadakis Nikolaos Mountakis Apostolos Argyros Mariza Spiridaki Ioannis Valsamos 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第8期16-32,共17页
In this study, we investigated the performance improvement caused by the addition of copper(Cu)nanoparticles to high-density polyethylene(HDPE) matrix material. Composite materials, with filler percentages of 0.0, 2.0... In this study, we investigated the performance improvement caused by the addition of copper(Cu)nanoparticles to high-density polyethylene(HDPE) matrix material. Composite materials, with filler percentages of 0.0, 2.0, 4.0, 6.0, 8.0, and 10.0 wt% were synthesized through the material extrusion(MEX)3D printing technique. The synthesized nanocomposite filaments were utilized for the manufacturing of specimens suitable for the experimental procedure that followed. Hence, we were able to systematically investigate their tensile, flexural, impact, and microhardness properties through various mechanical tests that were conducted according to the corresponding standards. Broadband Dielectric Spectroscopy was used to investigate the electrical/dielectric properties of the composites. Moreover, by employing means of Raman spectroscopy and thermogravimetric analysis(TGA) we were also able to further investigate their vibrational, structural, and thermal properties. Concomitantly, means of scanning electron microscopy(SEM), as well as atomic force microscopy(AFM), were used for the examination of the morphological and structural characteristics of the synthesized specimens, while energy-dispersive Xray spectroscopy(EDS) was also performed in order to receive a more detailed picture on the structural characteristics of the various synthesized composites. The corresponding nanomaterials were also assessed for their antibacterial properties regarding Staphylococcus aureus(S. aureus) and Escherichia coli(E. coli) with the assistance of a method named screening agar well diffusion. The results showed that the mechanical properties of HDPE benefited from the utilization of Cu as a filler, as they showed a notable improvement. The specimen of HDPE/Cu 4.0 wt% was the one that presented the highest levels of reinforcement in four out of the seven tested mechanical properties(for example, it exhibited a 36.7%improvement in the flexural strength, compared to the pure matrix). At the same time, the nanocomposites were efficient against the S. aureus bacterium and less efficient against the E. coli bacterium.The use of such multi-functional, robust nanocomposites in MEX 3D printing is positively impacting applications in various fields, most notably in the defense and security sectors. The latter becomes increasingly important if one takes into account that most firearms encompass various polymeric parts that require robustness and improved mechanical properties, while at the same time keeping the risk of spreading various infectious microorganisms at a bare minimum. 展开更多
关键词 High-density polyethylene(hdpe) Copper(Cu) Material extrusion(MEX) Mechanical performance Electrical properties ANTIBACTERIAL Defense and security
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HDPE管内衬盾构隧道复合式衬砌结构极限承载力试验研究
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作者 张达石 柳献 +1 位作者 张晨光 苏长裕 《特种结构》 2024年第1期41-48,共8页
为研究采用HDPE双壁缠绕管作为内衬的盾构隧道复合衬砌结构的破坏机理,依托桃浦污水处理厂初期雨水调蓄工程涉铁段排水隧道工程,开展整环足尺试验研究,得到如下结论:(1)复合衬砌结构破坏过程经历协调变形阶段和各自承载阶段,弹性极限点... 为研究采用HDPE双壁缠绕管作为内衬的盾构隧道复合衬砌结构的破坏机理,依托桃浦污水处理厂初期雨水调蓄工程涉铁段排水隧道工程,开展整环足尺试验研究,得到如下结论:(1)复合衬砌结构破坏过程经历协调变形阶段和各自承载阶段,弹性极限点为顶底部纵缝处界面的剥离脱开,各纵缝及管片本体相继发生破坏,纵缝处填充层混凝土发生拉剪或压剪破坏;(2)复合衬砌结构的薄弱位置为各纵缝处的界面及填充层混凝土,其中顶部和腰部纵缝处最为薄弱;(3)复合衬砌结构不同位置纵缝处的界面破坏和填充层破坏形态均源自于纵缝转动变形导致刚度差异引起的界面应力和填充层应力突变。 展开更多
关键词 hdpe 内衬 复合式衬砌结构 极限承载力
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HDPE/EUG弯曲样条的受热形状回复行为
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作者 陈雅波 王克俭 +1 位作者 樊泽鹏 楼子豪 《塑料》 CAS CSCD 北大核心 2024年第4期26-29,共4页
用挤出机将高密度聚乙烯(HDPE)与杜仲胶(EUG)进行熔融共混,研究了共混比对HDPE/EUG的熔融、结晶和热力学性能及弯曲形状回复性能的影响。结果表明,随着HDPE中EUG含量的增加,结晶峰向低温方向移动,而HDPE含量的增加诱导EUG结晶温度提高... 用挤出机将高密度聚乙烯(HDPE)与杜仲胶(EUG)进行熔融共混,研究了共混比对HDPE/EUG的熔融、结晶和热力学性能及弯曲形状回复性能的影响。结果表明,随着HDPE中EUG含量的增加,结晶峰向低温方向移动,而HDPE含量的增加诱导EUG结晶温度提高。当二次升温时,当HDPE中的EUG添加量增大时,熔融峰向高温偏移,当HDPE的含量增大时,EUG的熔融峰向低温偏移。热力学测试和弯曲样品受热回复过程中,变形呈现3个温度区间分别为低温慢速区、中温快速回复区和高温下中速回复区。随着EUG含量的增加,区间转变向低温偏移,这是由于,低熔点EUG更容易发生受热活化回复现象,因此,调整共混比例可以控制形状回复速度,回复程度随加热温度而改变。 展开更多
关键词 形状回复 高密度聚乙烯 杜仲胶 共混 形状记忆
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氯化聚乙烯专用HDPE树脂L5200的工业化开发及应用
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作者 李朋朋 李国新 +1 位作者 高琳 张晋波 《石化技术》 CAS 2023年第9期22-24,共3页
通过对氯化聚乙烯专用高密度聚乙烯(HDPE)树脂市场产品研究、生产技术和下游用户需求调研,结合兰州石化淤浆法高密度聚乙烯装置实际,进行了氯化聚乙烯专用HDPE树脂L5200的工业化开发和加工应用。结果表明,氯化聚乙烯专用HDPE树脂L5200... 通过对氯化聚乙烯专用高密度聚乙烯(HDPE)树脂市场产品研究、生产技术和下游用户需求调研,结合兰州石化淤浆法高密度聚乙烯装置实际,进行了氯化聚乙烯专用HDPE树脂L5200的工业化开发和加工应用。结果表明,氯化聚乙烯专用HDPE树脂L5200质量控制指标合理,生产方案可行,开发的L5200产品可实现在西北区域的产业化应用,促进兰州石化生产装置降本增效和地方企业扩大生产规模,具有明显的经济和社会效益。 展开更多
关键词 氯化聚乙烯专用料 结构与性能 工业化开发 hdpe树脂
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Recycling and depolymerization of waste polyethylene terephthalate bottles by alcohol alkali hydrolysis 被引量:11
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作者 SUN Cong-hao CHEN Xiang-ping +1 位作者 ZHUO Qiang ZHOU Tao 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第3期543-549,共7页
In this work,a novel alcohol alkali hydrolysis method was explored for the preparation of terephthalic acid(TPA)from waste polyethylene terephthalate(PET).First,a series of single factor experiments on the depolymeriz... In this work,a novel alcohol alkali hydrolysis method was explored for the preparation of terephthalic acid(TPA)from waste polyethylene terephthalate(PET).First,a series of single factor experiments on the depolymerization rate of waste PET bottles and the yield of TPA were conducted to determine the optimized experimental conditions,in terms of reaction time,reaction temperature,dosage of ethylene glycol and sodium bicarbonate,amount of distilled water and stirring rate.Then IR spectra and elemental analysis were carried out for the characterization of obtained product.Under optimal experimental conditions,over 98%PET can be depolymerized into the target product(TPA)and the purity and yield of TPA are over 97%and 94%,respectively.Both the experimental and analytical results support a feasible process for the preparation of TPA from waste PET.It is expected that this alcohol alkali hydrolysis method can promise an effective way for the sustainable recycling of waste PET. 展开更多
关键词 waste polyethylene terephthalate terephthalic acid alcohol alkali hydrolysis ethylene glycol
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煅烧黑色页岩/HDPE复合材料及其电性能研究
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作者 韩松 彭锦雯 +3 位作者 黎玲 容北国 刘远立 邓卫星 《绝缘材料》 CAS 北大核心 2023年第10期43-49,共7页
为了解决黑色页岩(BS)在作为聚合物填料应用过程中与偶联剂相互作用差、所含硫元素在加工过程中异味重等问题,本研究对黑色页岩进行煅烧加工,利用XPS、FTIR、SEM等分析了煅烧对页岩组成和形貌的影响。随后制备了煅烧BS/高密度聚乙烯(HD... 为了解决黑色页岩(BS)在作为聚合物填料应用过程中与偶联剂相互作用差、所含硫元素在加工过程中异味重等问题,本研究对黑色页岩进行煅烧加工,利用XPS、FTIR、SEM等分析了煅烧对页岩组成和形貌的影响。随后制备了煅烧BS/高密度聚乙烯(HDPE)复合材料,并测试了复合材料的热学性能、力学性能和电学性能。结果表明:煅烧去除了BS中的有机质和硫铁矿,600℃下煅烧后BS的碳原子摩尔比由35.95%下降到6.98%,而硫原子摩尔比已经不可测出,页岩保持层状结构并有片层裂碎现象,且页岩层间距略有缩小。煅烧BS/HDPE复合材料的冲击强度比天然BS/HDPE的冲击强度提升显著,这是因为煅烧后的BS与HDPE之间存在大量的界面粘接,而天然BS与HDPE之间完全分离。煅烧BS/HDPE复合材料的体积电阻率维持在4.79×10^(16)Ω·cm及以上,表明煅烧BS的加入对复合材料的介电性能影响较小,复合材料拥有较好的电绝缘性能。 展开更多
关键词 黑色页岩 高密度聚乙烯 煅烧 冲击强度 体积电阻率
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Utilization of waste polyethylene terephthalate as a reducing agent in the reduction of iron ore composite pellets
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作者 Gkhan Polat Burak Birol Muhlis Nezihi Saridede 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2014年第8期748-754,共7页
The increasing consumption of plastics inevitably results in increasing amounts of waste plastics. Because of their long degradation periods, these wastes negatively affect the natural environment. Numerous studies ha... The increasing consumption of plastics inevitably results in increasing amounts of waste plastics. Because of their long degradation periods, these wastes negatively affect the natural environment. Numerous studies have been conducted to recycle and eliminate waste plastics. The potential for recycling waste plastics in the iron and steel industry has been underestimated; the high C and H contents of plastics may make them suitable as alternative reductants in the reduction process of iron ore. This study aims to substitute plastic wastes for coal in reduction melting process and to investigate their performance during reduction at high temperature. We used a common type of waste plastic, polyethylene terephthalate (PET), because of its high carbon and hydrogen contents. Composite pellets containing PET wastes, coke, and magnetite iron ore were reduced at selected temperatures of 1400 and 1450℃ for reduction time from 2 to 10 min to investigate the reduction melting behavior of these pellets. The results showed that an increased temperature and reduction time increased the reduction ratio of the pellets. The optimum experimental conditions for obtaining metallic iron (iron nuggets) were reduction at 1450℃ for 10 min using composite pellets containing 60% PET and 40% coke. 展开更多
关键词 polyethylene terephthalate (PET) waste recycling reducing agents iron ore pellets ore reduction
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A Starch-Based Biodegradable Polyethylene for Municipal Solid Waste Mitigation
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作者 Adedoyin Raheem Bolaji Aremo Mosobalaje Oyebamiji Adeoye 《Materials Sciences and Applications》 2017年第1期26-36,共11页
This work reports a method for reducing the longevity of the polymer content of Municipal Solid Wastes (MSW) in the environment. In this approach biodegradability was imparted on polyethylene, a popular, low-cost comm... This work reports a method for reducing the longevity of the polymer content of Municipal Solid Wastes (MSW) in the environment. In this approach biodegradability was imparted on polyethylene, a popular, low-cost commodity polymer, using starch additives. Corn starch and cassava starch in varying proportions were compounded with suitably prepared polyethylene powder and compression-moulded in steel dies. Alongside tensile test, biodegradability tests were carried out by burying samples for 28 days in two different soil types with different pH, fungi and bacteria load. Cassava starch additions were found to be better at imparting biodegradability. Also, alkaline soil types with higher bacteria load seemed a more favourable environment for accomplishing biodegradation in the starch-polyethylene composites. 展开更多
关键词 MUNICIPAL Solid waste polyethylene BIODEGRADATION Polymers
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Adsorption and Kinetic Study of Activated Carbon Produced from Post-Consumer Low-Density Polyethylene (LDPE) Wastes
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作者 Olajumoke Alabi-Babalola Elizabeth Aransiola Toyin Shittu 《Advances in Chemical Engineering and Science》 2021年第1期38-64,共27页
Post-consumer polymeric wastes in form of low-density polyethylene (LDPE) can now be considered suitable as a precursor for the synthesis of low-cost activated carbon (AC). This study produced AC from LDPE using sulph... Post-consumer polymeric wastes in form of low-density polyethylene (LDPE) can now be considered suitable as a precursor for the synthesis of low-cost activated carbon (AC). This study produced AC from LDPE using sulphuric acid (H<sub>2</sub>SO<sub>4</sub>) and potassium hydroxide (KOH) as the activating agent. The reaction conditions for pyrolysis were varied in the range of 0.50 - 2.00 M, 400<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span>C - 500<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span>C, and 45 - 60 minutes. Physico-chemical investigations reveal that AC yield is significantly dependent on both carbonization temperatures and time. The obtained optimum values of 446.50<span style="color:#4F4F4F;font-family:-apple-system, " font-size:16px;white-space:normal;background-color:#ffffff;"="">°</span>C and 51.09 mins gave a yield of 24% for the base-activated carbon. The high iodine numbers obtained strongly indicate the presence of large surface area and pore volumes is further confirmed using the Scanning Electron Microscopy (SEM) analysis which reveals the presence of pores on the external surface of the carbons. Fourier Transform Infrared Technique (FTIR) analysis further shows that the synthesized compounds are purely carbon with rich oxy-gen-surface complexes on the surface which is as a result of the introduction of the chemical oxidizing agents. The produced carbons were found to have high adsorption affinity for selected inorganic ions which are: Mn<sup>7+</sup>, Co<sup>2+</sup>, and Cr<sup>6+</sup>. Adsorption isotherm results show the adsorption process to be favourable with the Langmuir isotherm parameter RL having values of <1, while the Freudlich adsorption model was found to perfectly fit the data at selected adsorbent dosages and adsorbate concentrations. The pseu-do-second-order model provides the best correlation for the kinetic analysis. The acid-activated carbon was found to have better adsorption capacities than the base-activated carbon. 展开更多
关键词 Activated Carbon Low-Density polyethylene wastes PYROLYSIS Chemical Activation Optimization ADSORPTION
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地下室HDPE排水板绿色疏水系统研究应用
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作者 付正权 陈昌海 +2 位作者 陈俊 闵旭 王海江 《建筑技术开发》 2023年第S01期130-132,共3页
HDPE排水板,全称为高密度聚乙烯排水板,是一种用于建筑工程中地下水处理和排水的材料,它具有高密度、高强度、耐腐蚀、耐磨损等优良性能,HDPE排水板通常由一层厚度不等的高密度聚乙烯制成,表面覆盖有一系列大小不等、密度不同的圆形凹陷... HDPE排水板,全称为高密度聚乙烯排水板,是一种用于建筑工程中地下水处理和排水的材料,它具有高密度、高强度、耐腐蚀、耐磨损等优良性能,HDPE排水板通常由一层厚度不等的高密度聚乙烯制成,表面覆盖有一系列大小不等、密度不同的圆形凹陷,这些凹陷可在地下水流动时,将地下水快速引流到下方或侧方的排水管或出水口处,并能保护建筑物基础不受地下水的损害。在市政工程、居民小区、大型工厂等工程项目的地下排水中,HDPE排水板得到了广泛的应用和推广。 展开更多
关键词 hdpe 高密度聚乙烯 密度不同
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Optimization of Extrusion Process Parameters of Recycled High-Density Polyethylene-Thermoplastic Starch Composite for Fused Filament Fabrication
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作者 Grace Njeri Wamuti James Wamai Mwangi +2 位作者 Samuel Kabini Karanja Leif Micke Henning Zeidler 《Open Journal of Composite Materials》 2023年第4期69-86,共18页
High-density poly-ethylene (HDPE) is a nonbiodegradable recyclable plastic which is widely utilized in single use packaging applications. Consequently, it constitutes a significant amount of plastic waste found in lan... High-density poly-ethylene (HDPE) is a nonbiodegradable recyclable plastic which is widely utilized in single use packaging applications. Consequently, it constitutes a significant amount of plastic waste found in landfills. From literature, it has been shown that parts produced using composites of HDPE with carbohydrate-based polymers, such as thermoplastic starch (TPS), experience mechanical degradation through hydrolytic degradation process. The possible utilization of recycled-HDPE (rHDPE) and TPS composite in nonconventional manufacturing processes such as Fused filament fabrication (FFF) has however not been explored. This study explores the potential application of rHDPE and TPS composites in FFF and optimizes the extrusion process parameters used in rHDPE-TPS filament production process. Taguchi method was utilized to analyze the extrusion process. The extrusion process parameters studied were the spooling speed, extrusion speed and the extrusion temperatures. The response variable studied was the filament diameter. In this research, the maximum TPS content achieved during filament production was 40 wt%. This filament was however challenging to use in FFF printers due to frequent nozzle clogging. Printing was therefore done with filaments that contained 0 - 30 wt% TPS. The experimental results showed that the most significant parameter in extrusion process was the spooling speed, followed by extrusion speed. Extrusion temperature had the least significant influence on the filament diameter. It was observed that increase in TPS content resulted in reduced warping and increased rate of hydrolytic degradation. Mechanical properties of printed parts were investigated and the results showed that increasing TPS content resulted in reduction in tensile strength, reduction in compression strength and increase in stiffness. The findings of this research provide valuable insights to plastic recycling industries and researchers regarding the utilization of recycled HDPE and TPS composites as substitute materials in FFF. 展开更多
关键词 Additive Manufacturing (AM) Fused Filament Fabrication (FFF) High Density polyethylene (hdpe) Thermoplastic Starch (TPS) Bio-Composite
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基于废HDPE高环刚度双壁波纹管料的制备及性能
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作者 李湘 许剑宝 《现代塑料加工应用》 CAS 2023年第1期5-8,共4页
将废弃的高密度聚乙烯(HDPE)中空瓶(桶)通过分拣、带水破碎、清洗、脱水、过气流分选机等工艺处理,得到了HDPE中空破碎料。试验结果表明:处理后HDPE中空破碎料性能较好;桂墨粉比黑滑石粉更适合用于制备HDPE双壁波纹管料;添加废乙烯-辛... 将废弃的高密度聚乙烯(HDPE)中空瓶(桶)通过分拣、带水破碎、清洗、脱水、过气流分选机等工艺处理,得到了HDPE中空破碎料。试验结果表明:处理后HDPE中空破碎料性能较好;桂墨粉比黑滑石粉更适合用于制备HDPE双壁波纹管料;添加废乙烯-辛烯共聚物破碎料可以提高双壁波纹管的环柔性,但对其环刚度影响较大;再生线型低密度聚乙烯(LLDPE)可以明显提高HDPE复合材料的缺口冲击强度和断裂伸长率,当其质量分数为6%时,HDPE复合材料的缺口冲击强度和断裂伸长率分别为27.5 kJ/m^(2)和225.4%,由该复合材料挤出的双壁波纹管环刚度等级达到SN8级,且能通过环柔性测试。 展开更多
关键词 废高密度聚乙烯中空瓶(桶) 桂墨粉 双壁波纹管 环刚度 环柔性
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木粉/HDPE复合材料的力学性能与流动性能 被引量:29
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作者 朱晓群 周亨近 +2 位作者 魏浩 郑裕堃 张志龙 《北京化工大学学报(自然科学版)》 EI CAS CSCD 2001年第1期56-58,共3页
用木粉与高密度聚乙烯 (HDPE)复合制备了能代替木材的复合材料。考察了木粉含量、粒度、界面相容剂用量对复合材料力学性能、流动性的影响。结果表明 ,复合材料的弯曲强度随木粉含量的增加而提高 ,冲击强度随木粉含量的增加而下降 ;弯... 用木粉与高密度聚乙烯 (HDPE)复合制备了能代替木材的复合材料。考察了木粉含量、粒度、界面相容剂用量对复合材料力学性能、流动性的影响。结果表明 ,复合材料的弯曲强度随木粉含量的增加而提高 ,冲击强度随木粉含量的增加而下降 ;弯曲强度随木粉粒度减小显著降低 ,而冲击强度先有所升高而后降低 ;界面相容剂能有效改善材料的性能 ,其较佳用量约为 5 % (质量分数 ) 展开更多
关键词 高密度聚乙烯 木粉 界面相容剂 复合材料 力学性能 流动性能
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HDPE管道修复技术在大港南部油田的应用 被引量:14
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作者 刘碧峰 罗晓明 +2 位作者 马先平 纪朝凤 陈树宏 《油气储运》 CAS 北大核心 2010年第8期638-639,共2页
介绍了高密度聚乙烯(HDPE)管道修复技术的原理、性能特点、施工工艺,结合大港南部油田应用实践,分析了其对油田集输管道、供水管道修复的适用性和经济性。该技术很好地解决了腐蚀泄漏严重的旧管道修复利用问题,不仅延长了管道使用寿命... 介绍了高密度聚乙烯(HDPE)管道修复技术的原理、性能特点、施工工艺,结合大港南部油田应用实践,分析了其对油田集输管道、供水管道修复的适用性和经济性。该技术很好地解决了腐蚀泄漏严重的旧管道修复利用问题,不仅延长了管道使用寿命、节省了大量管道更换费用,而且可以实现不停产在线修复。同时总结了该技术的优势,提出了改进建议。 展开更多
关键词 腐蚀 泄漏 在线修复 输油管道 高密度聚乙烯(hdpe)
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废胶粉/HDPE热塑性弹性体的制备研究 被引量:14
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作者 王星义 王星 +1 位作者 罗玲 余自力 《塑料工业》 CAS CSCD 北大核心 2008年第8期20-22,29,共4页
考察了废胶粉粒径和用量、共混时间、温度以及EVA用量对废胶粉/高密度聚乙烯(WRP/HDPE)力学性能的影响。获得了制备性能良好的WRP/HDPE共混物的条件为:WRP/HDPE的质量比为50/25、共混时间为22 min、共混温度为170℃以及EVA用量为总质量... 考察了废胶粉粒径和用量、共混时间、温度以及EVA用量对废胶粉/高密度聚乙烯(WRP/HDPE)力学性能的影响。获得了制备性能良好的WRP/HDPE共混物的条件为:WRP/HDPE的质量比为50/25、共混时间为22 min、共混温度为170℃以及EVA用量为总质量的23%。共混材料的微观结构研究结果表明,EVA的加入增强了共混物之间的界面结合力,提高了共混物的物理机械性能。力学性能的研究表明,该共混材料可作为热塑弹性体使用。 展开更多
关键词 废胶粉 高密度聚乙烯 热塑性弹性体
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HDPE土工膜长期性能稳定性的研究进展 被引量:11
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作者 梁森荣 张澄博 +3 位作者 张永定 陈仲如 林涛 李洪艺 《环境科学与技术》 CAS CSCD 北大核心 2012年第9期77-81,102,共6页
垃圾填埋场底部高密度聚乙烯(HDPE)土工膜会因氧化降解而使防渗性能降低,对环境带来二次污染风险,因此,HDPE膜的长期稳定性是值得关注的问题,但国内相关研究甚少。HDPE膜的降解过程可分为3个阶段,主要受自身性质、温度、接触介质和衬垫... 垃圾填埋场底部高密度聚乙烯(HDPE)土工膜会因氧化降解而使防渗性能降低,对环境带来二次污染风险,因此,HDPE膜的长期稳定性是值得关注的问题,但国内相关研究甚少。HDPE膜的降解过程可分为3个阶段,主要受自身性质、温度、接触介质和衬垫结构等因素的影响。文章重点综述了国外研究HDPE膜长期稳定性的试验方法,归纳了相关的数学模型,并根据存在的问题提出了建议。室内试验一般采用老化试验,包括浸泡试验和模拟试验,二者均能加快HDPE膜的老化进程。前者一般将试样完全浸泡于研究介质中试验,试验值较为保守;后者将样品置于模拟的衬垫构造中试验,结果更接近实际。数学模型采用Arrhenius模型,精度和所需参数取决于老化试验,现阶段大部分计算结果较片面,完善试验是后续工作的重点。 展开更多
关键词 hdpe土工膜 长期稳定性 氧化降解 老化实验 Arrhenius模型
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