PDMS改性蓖麻油基水性聚氨酯的制备及防污性能  

Preparation and antifouling performance of castor oil based waterborne polyurethane modified by PDMS

作　　者：吕斌 张鹤年 高党鸽 LYU Bin;ZHANG Henian;GAO Dangge(College of Bioresources Chemical&Materials Engineering,Shaanxi University of Science&Technology,Xi'an 710021,Shaanxi,China;Xi'an Key Laboratory of Green Chemicals and Functional Materials,Xi'an 710021,Shaanxi,China;National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science&Technology,Xi'an 710021,Shaanxi,China)

机构地区：[1]陕西科技大学轻工科学与工程学院,陕西西安710021 [2]西安市绿色化学品与功能材料重点实验室,西安710021 [3]陕西科技大学轻化工程国家级实验教学示范中心,陕西西安710021

出　　处：《精细化工》2022年第3期541-547,共7页Fine Chemicals

基　　金：陕西省重点研发计划(2020GY-258);陕西省创新能力支撑计划(2021TD-16)。

摘　　要：二甲基二甲氧基硅烷通过水解缩合反应合成了聚二甲基硅氧烷(PDMS),将PDMS引入到蓖麻油基水性聚氨酯(CWPU-SOP)中,制备出PDMS改性的蓖麻油基水性聚氨酯乳液(PDMS/CWPU-SOP)。采用FTIR、TEM、SEM对样品进行了表征,测试了PDMS/CWPU-SOP薄膜的水接触角、耐水性、防污性能和机械性能,探讨了其防污机理。结果表明,与CWPU-SOP薄膜相比,当PDMS含量(以除去PDMS、水、丙酮外所有物质的质量计)为8%时,制备的PDMS/CWPU-SOP8薄膜的水接触角由85°升至110°,吸水率由23.1%下降至15.3%,PDMS的引入提高了CWPU-SOP薄膜的疏水性和耐水性。此外,不同酸碱性液滴在PDMS/CWPU-SOP8薄膜表面可自由滚落且不留痕迹,表明PDMS/CWPU-SOP8薄膜具有一定的防污性能。Polydimethylsiloxane(PDMS)was synthesized by hydrolysis condensation reaction of dimethyldimethoxysilane and then introduced into castor oil-based waterborne polyurethane(CWPU-SOP)to prepare PDMS modified castor oil-based waterborne polyurethane emulsion(PDMS/CWPU-SOP).The samples were characterized by FTIR,TEM and SEM.The water contact angle,water resistance,antifouling performance and mechanical properties of PDMS/CWPU-SOP films were tested.The antifouling mechanism was discussed.The results showed that compared with those of CWPU-SOP film,the water contact angle of PDMS/CWPU-SOP8 film with PDMS content(based on the mass of all substances excluding PDMS,water and acetone)of 8% increased from 85°to 110°,and the water absorption decreased from 23.1% to 15.3%.The introduction of PDMS improved the film’s hydrophobicity and water resistance.In addition,droplets with different acid and alkaline could roll freely on the surface of PDMS/CWPU-SOP8 film without leaving any trace,indicating that PDMS/CWPU-SOP8 film had certain antifouling performance.

关 键 词：蓖麻油基水性聚氨酯 聚二甲基硅氧烷 耐水性 防污性能 功能材料 

分 类 号：TQ630.43[化学工程—精细化工]