改性纳米结晶纤维素对水性聚氨酯浸润性的研究  

Wetting Property of Modified Nanocrystalline Cellulose on Waterborne Polyurethane

作　　者：佘颖[1] 张浩[1] 宋舒苹[1] 陈鹤予[1] 蒲俊文[1] 

机构地区：[1]北京林业大学材料科学与技术学院,北京100083

出　　处：《林产化学与工业》2013年第2期77-80,共4页Chemistry and Industry of Forest Products

基　　金：林业公益性行业科研专项(201204702-B2);北京市自然科学基金资助项目(2112032)

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%。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.

关 键 词：纳米结晶纤维素 改性 浸润性 聚氨酯 接触角 

分 类 号：TQ35[化学工程] TS727[轻工技术与工程—制浆造纸工程]