中国塑料 ›› 2022, Vol. 36 ›› Issue (11): 67-72.DOI: 10.19491/j.issn.1001-9278.2022.11.010

• 材料与性能 • 上一篇    下一篇

环氧树脂/纳米纤维素复合材料的制备与性能研究

张克宏(), 褚承祥, 刘孝龙   

  1. 安徽农业大学轻纺工程与艺术学院,安徽 合肥 230036
  • 收稿日期:2022-08-14 出版日期:2022-11-26 发布日期:2022-11-25
  • 作者简介:张克宏(1977—),男,副教授,从事聚合物功能材料研究,zkh@ahau.edu.cn
  • 基金资助:
    安徽省自然科学基金面上项目(1908085ME154);近海流域环境测控治理福建省高校重点实验室2020年度开放课题(S1?KF2003);安徽省级教学示范课《包装材料学》(2020SJJXSFK09)

Preparation and properties of epoxy resin/cellulose nanofiber composites

ZHANG Kehong(), CHU Chengxiang, LIU Xiaolong   

  1. Textile Engineering and Academy of Art,Anhui Agricultural University,Hefei 230036,China
  • Received:2022-08-14 Online:2022-11-26 Published:2022-11-25

摘要:

以木粉为原料制备纳米纤维素(CNF),经甲基丙烯酸缩水甘油酯(GMA)改性后采用溶液共混法与环氧树脂(EP)复合,制得EP/CNF⁃GMA复合材料;通过对EP/CNF、EP/CNF⁃GMA复合材料力学性能、透光性能、亲水性、热稳定性和微观结构的表征,研究了CNF和GMA含量对复合材料性能的影响及其机理。结果表明,EP/CNF复合材料的拉伸强度、断裂伸长率、透光率随CNF含量的增大呈先增后减的变化趋势,亲水性随CNF含量的增大而增大;CNF含量为0.6 %(质量分数,下同)时,EP/CNF复合材料性能最优,拉伸强度为32.166 MPa,断裂伸长率为20.995 %,600 nm处透光率为79.8 %,接触角为77.34°。经GMA改性后,CNF与EP的相容性得到了改善,提升了EP/CNF复合材料的力学性能和热稳定性;随GMA含量的增加,EP/CNF⁃GMA复合材料的拉伸强度、断裂伸长率、透光率和亲水性均发生变化;GMA含量为4.8 %时EP/CNF⁃GMA复合材料性能最佳,拉伸强度为57.933 MPa,断裂伸长率为18.762 %,600 nm处透光率为86.3 %,接触角为81.42 °。

关键词: 纳米纤维素, 环氧树脂, 甲基丙烯酸缩水甘油酯, 复合材料

Abstract:

Cellulose nanofibers (CNF) were prepared using wood powders as a raw material, and then the epoxy (EP)⁃based composites with the glycidyl methacrylate (GMA)⁃modified CNF were prepared using a solution casting method. The effect of CNF and GMA contents on the properties and mechanisms of the composites were investigated through characterizing their mechanical properties, light transmission properties, hydrophilic properties, thermal stability, and microstructure. The results indicated that the EP/CNF composites exhibited an increase at first and then a decrease in tensile strength, elongation at break, and light transmittance with an increase in the CNF content, and their hydrophilic property increased with the CNF content. The EP/CNF composites obtained optimal performance at a CNF content of 0.6 wt%, resulting in tensile strength of 32.166 MPa, elongation at break of 20.995 %, and light transmittance of 79.8 % at 600 nm, and a contact angle of 77.34°. The compatibility between the GMA⁃modified CNF and EP was improved, leading to an enhancement in the mechanical properties and thermal stability of the composites. Their tensile strength, elongation at break, light transmittance, and hydrophilic property varied with an increase in the GMA content. The EP/GMA⁃modified CNF composites exhibited optimal performance at a GMA content of 4.8 wt%, resulting in tensile strength of 57.933 MPa, elongation at break of 18.762 %, light transmittance of 86.3 % at 600 nm, and a contact angle of 81.42°.

Key words: cellulose nanofiber, epoxy resin, glycidyl methacrylate, composite

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