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林产化学与工业 ›› 2013, Vol. 33 ›› Issue (2): 77-80.doi: 10.3969/j.issn.0253-2417.2013.02.013

• 研究报告 • 上一篇    下一篇

改性纳米结晶纤维素对水性聚氨酯浸润性的研究

佘颖, 张浩, 宋舒苹, 陈鹤予, 蒲俊文   

  1. 北京林业大学 材料科学与技术学院, 北京 100083
  • 收稿日期:2012-03-19 修回日期:1900-01-01 出版日期:2013-04-30 发布日期:2013-04-30
  • 通讯作者: 蒲俊文,教授,博士生导师,从事纳米纤维素等方面研究;E-mail:pujunwen@126.com。

Wetting Property of Modified Nanocrystalline Cellulose on Waterborne Polyurethane

SHE Ying, ZHANG Hao, SONG Shu-ping, CHEN He-yu, PU Jun-wen   

  1. College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China
  • Received:2012-03-19 Revised:1900-01-01 Online:2013-04-30 Published:2013-04-30

摘要: 利用硅烷偶联剂对纳米结晶纤维素(NCC)进行表面改性以提高其对水性聚氨酯的浸润性,并以改性NCC关于水性聚氨酯的接触角为主要依据,研究了NCC表面改性对浸润性影响规律。实验以硅烷偶联剂SCA-1、SCA-2、SCA-3为改性剂,以水性聚氨酯为有机相。结果表明: 1)SCA-1、SCA-2、SCA-3中不同的疏水性基团,能使改性NCC关于水性聚氨酯的浸润能力产生不同程度的提高; 2)SCA-3结构中的环氧基团空间位阻效应明显,SCA-3用量8 %时可使改性后的NCC对水性聚氨酯浸润性提高37.7 %。

关键词: 纳米结晶纤维素, 改性, 浸润性, 聚氨酯, 接触角

Abstract: The wetting property of surface modified nanocrystalline cellulose (NCC) by silane coupling agent (SCA-1, SCA-2, and SCA-3) on waterborne polyurethane was improved in this study. The contact angle was selected to estimate the wetting effects of modified NCC on waterborne polyurethane. The results indicated that all the different lipophilic groups of SCA-1, SCA-2, and SCA-3 could lead to the improvements of wetting property between NCC and waterborne polyurethane. The wetting property of NCC modified by SCA-3 increased significantly by 37.7% due to the steric hinerance of epoxide groups. This was higher than that of SCA-1 and SCA-2.

Key words: nanocrystalline cellulose, modification, wetting property, polyurethane, contact angle

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