中国塑料

中国塑料 ›› 2017, Vol. 31 ›› Issue (03): 53-57 .DOI: 10.19491/j.issn.1001-9278.2017.03.010

• 材料与性能 • 上一篇    下一篇

秸秆粉的改性及其表面极性对木塑复合材料界面的影响

王光照1,姜洪丽2,程文家2   

  1. 1. 泰山医学院化工学院2. 泰山医学院化学与制药工程学院
  • 收稿日期:2016-10-17 修回日期:2016-12-05 出版日期:2017-03-26 发布日期:2017-03-26

Effects of Modified Wheat Straw Powders and Their Surface Polarity on Interface of Wood-plastics Composites

  • Received:2016-10-17 Revised:2016-12-05 Online:2017-03-26 Published:2017-03-26

摘要： 通过接枝苯乙烯对秸秆粉表面进行改性，采用毛细管上升法测定了秸秆粉、改性秸秆粉的表面接触角，依据Washburn方程和Owens法，求解2种秸秆粉的表面自由能及其极性和非极性分量，并通过电子拉伸试验机、扫描电子显微镜研究了不同秸秆粉对木塑复合材料力学性能、微观形貌的影响。结果表明，改性秸秆粉的表面自由能为24.77 mN/m，体现分子色散力的非极性分量为19.79 mN/m；而秸秆粉的表面自由能为18.90 mN/m，其非极性分量为3.75 mN/m，说明接枝共聚可有效地改善秸秆粉的表面极性；与聚合物复合时，改性秸秆粉比秸秆粉具有更好的界面融合性，改性秸秆粉在基体中的分散性优于秸秆粉。

关键词: 表面接触角, 表面自由能, 界面融合, 分散性

Abstract: Wheat straw powders (WSP) were surface-modified by grafting with styrene. Contact angles were measured by a capillary rise method for the WSP before and after surface modification, and then the surface free energy was evaluated by the Washburn equation according to Owens’ method. The results indicated that the modified WSP achieved 24.77 mN·m-1 in surface free energy as well as 19.79 mN·m-1 in its nonpolar part, whereas the pristine WSP only obtained 18.90 mN·m-1 and 3.75 mN·m-1 for these two parameters. This implicates that graft modification is a useful means for nonpolarization of WSP. Moreover, SEM observation confirmed that the modified WSP had better interfacial compatibility with thermoplastics.

Key words: surface contact angles, surface free energy, interfacial compatibility, dispersion

京公网安备11010802034965号　 京ICP备13020181号-2
《中国塑料》编辑部 ©2008-2023 版权所有
地址:北京市海淀区阜成路11号　邮编：100048
编辑部：010-68985541　联系信箱：cp@plaschina.com.cn
广告部/发行部：010-68985253　本系统由北京玛格泰克科技发展有限公司设计开发