有机阳离子辅助剥离滑石及PE/滑石复合材料力学性能研究  

Study on the Exfoliation of Talc Powder Assisted by Organic Cations and the Mechanical Properties of PE/Talc Composites

作　　者：钟力 邹正光[1] ZHONG Li;ZOU Zheng-guang(College of Materials Science and Engineering,Guilin University of Technology,Guilin 541000,China)

机构地区：[1]桂林理工大学材料科学与工程学院,广西桂林541000

出　　处：《塑料科技》2021年第12期50-54,共5页Plastics Science and Technology

摘　　要：通过多步插层反应成功剥离滑石粉,探究三乙醇胺阳离子对滑石片层剥离效果的影响。通过改性前后滑石粉与聚乙烯(PE),制备PE/滑石复合材料,并探究PE/滑石复合材料的力学性能。结果表明:通过有机分子插层成功剥离滑石粉,滑石比表面积从4.21 m^(2)/g增至30.97 m^(2)/g,有利于滑石在有机基体中更好地分散。通过三乙醇胺阳离子改性滑石,可以将难以直接插层的乙酸铵分子插入滑石层间。当加入剥离滑石,复合材料具有更高的拉伸强度与弯曲强度。滑石掺入量为30%时,与PE/未改性滑石相比,复合材料的拉伸强度提高0.56 MPa,弯曲强度提高1.06 MPa,这与滑石和基体的接触面积及滑石在基体中的分散程度密切相关。The talc powder was successfully exfoliated through multi-step intercalation reaction.The influence of triethanolamine cation on the exfoliation effect of talc was explored.PE/talc composites were prepared by talc powder and polyethylene(PE)before and after modification,and the mechanical properties of PE/talc composites were explored.The results show that the talc powder is successfully exfoliated by organic molecular intercalation,and the specific surface area of talc increases from 4.21 m^(2)/g to 30.97 m^(2)/g,which is conducive to the better dispersion of talc in the organic matrix.The ammonium acetate molecules which are difficult to directly intercalate can be inserted into the interlayer of modified talc by triethanolamine cation.When the exfoliated talc is added,the composites have higher tensile strength and bending strength.When the talc content is 30%,compared with PE/unmodified talc,the tensile strength of the composite increases by 0.56 MPa and the flexural strength increases by 1.06 MPa,which is closely related to the contact area between talc and matrix and the dispersion degree of talc in the matrix.

关 键 词：天然滑石 有机插层 剥离 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ325.12[化学工程—合成树脂塑料工业]