新材料与新技术

PA6/磺化石墨烯功能微球的制备及性能研究

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  • 1.浙江工业大学材料科学与工程学院,杭州310014;
    2.华东理工大学材料科学与工程学院,上海200237
王钒丞(1994-),硕士研究生,主要研究方向为聚酰胺微球复合材料。

收稿日期: 2019-11-05

  修回日期: 2020-12-27

  网络出版日期: 2021-05-10

基金资助

国家自然基金面上项目(51873193);国家重点研发计划重点项目(2017YFB0307503);国际合作专项(2016YFE0133200)

Preparation and characterization of PA6/SG functional microsphere

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  • 1. College of Materials Science and Engineering,Zhejiang University of Technology, Hangzhou 310014;
    2. School of Materials and Science and Engineering,East China University of Science and Technology,Shanghai 200237

Received date: 2019-11-05

  Revised date: 2020-12-27

  Online published: 2021-05-10

摘要

以己内酰胺(CL)、聚苯乙烯(PS)、磺化石墨烯(SG)为主要原料,通过阴离子聚合反应诱导相分离的方法,制备得到了一系列粒径可控的PA6/SG杂化微球。SG在PS的存在下,选择性分散在CL单体中,形成CL/PS/SG悬浮液;再通过CL原位阴离子聚合制备PA6/PS/SG合金,利用甲苯除去PS相后可以获得粒径分布在10~50μm的PA6/SG微球。扫描电镜及粒径测试结果表明,PS及SG含量可以影响PA6微球的形貌及尺寸。通过透射电镜可确定SG选择性分散在了PA6相中,同时SG的加入可有效地改善PA6的热稳定性、结晶性、熔融性能和烧结性能,并且适用于3D打印激光烧结领域。

本文引用格式

王钒丞, 温兴翰, 李明沛, 李玉林, 吴波震 . PA6/磺化石墨烯功能微球的制备及性能研究[J]. 化工新型材料, 2021 , 49(3) : 83 -89 . DOI: 10.19817/j.cnki.issn 1006-3536.2021.03.019

Abstract

Nylon is one of the most widely used engineering plastics due to their combinative merits,including light density,good strength and durable toughness,chemical resistance.These advantages make nylon as an ideal candidate for 3D printing through selective laser sintering technology (SLS).In this case,how to develop nylon microspheres with controllable size and good processability is determinant for their SLS 3D printing application.A kind of sulfonated graphene-hybridized polyamide 6 (PA6/SG) functional microspheres with adjustable diameters were fabricated via reaction induced phase separation technique.SG was firstly dispersed in caprolactam monomer (CL) in the presence of polystyrene (PS) to form CL/PS/SGsolution.CL was then in-situ polymerized into PA6/PS/SG composite.Scanning Electron Microscopy (SEM) images indicated that the shape and morphology of the PA6 microspheres in the PA6/PS/SG alloy can be mediated through controlling the degree of phase inversion and content of SG.After PS removal by toluene,PA6/SG microspheres with controllable size (10~50μm) and narrow size distribution were obtained.Transmission Electron Microscopy (TEM) images shown a successful incorporation of SG in PA6/SG microspheres,which improved the crystallization and melting properties,as well as thermal stability,enabling a wide sintering window which was good for selective laser sintering 3D printing applications.

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