高耐静水压水性聚氨酯的制备及其有机硅改性  

Preparation and silicone modification of waterborne polyurethane with high hydrostatic pressure resistance

作　　者：沈麟泷 王成龙[1,2] 宋瑶瑶 盛霞 章梅 郑今欢[1,2] SHEN Linlong;WANG Chenglong;SONG Yaoyao;SHENG Xia;ZHANG Mei;ZHENG Jinhuan(Engineering Research Center for Eco-Dyeing&Finishing of Textiles,Ministry of Education,Zhejiang Sci-Tech University,Hangzhou310018,China;Engineering Research Center for Green and Low-carbon Dyeing&Finishing,Zhejiang Sci-Tech University,Hangzhou310018,China;Soyang Technical Textile(Zhejiang)Co.,Ltd.,Haining 314400,China)

机构地区：[1]浙江理工大学生态染整技术教育部工程研究中心,杭州310018 [2]浙江理工大学绿色低碳染整技术浙江省工程研究中心,杭州310018 [3]浙江亦阳新材料有限公司,海宁314400

出　　处：《浙江理工大学学报（自然科学版）》2022年第4期542-549,共8页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：浙江省基础公益研究计划(LGF21E030004)。

摘　　要：为进一步提高水性聚氨酯涂层织物的耐静水压特性,采用聚丙二醇(PPG)和聚四氢呋喃醚二醇(PTMEG)为混合软段,二羟甲基丁酸(DMBA)为亲水扩链剂,异佛尔酮二异氰酸酯(IPDI)为硬段,制备高耐静水压水性聚氨酯涂层剂,并采用双端羟丙基聚硅氧烷(DHPDMS)对其进行改性,制备有机硅改性水性聚氨酯涂层剂;利用红外光谱仪、X射线光电子能谱仪、视频接触角测定仪、万能材料试验机和渗水性测定仪对涂层剂的结构和性能进行分析,探讨初始R值、软段比例、DHPDMS用量对水性聚氨酯及改性涂层剂力学性能和耐静水压性能的影响。结果表明:当反应体系初始R值为1.5,PPG/PTMEG软段比例为1∶2,DHPDMS质量分数为5.0%时,涂层织物的耐静水压值可达7500 mmH_(2)O;与未改性的水性聚氨酯相比,采用有机硅改性水性聚氨酯可进一步提高胶膜的力学性能和涂层织物的耐静水压性能。该有机硅改性水性聚氨酯涂层剂可在一定程度上改善传统水性聚氨酯涂层织物耐静水压差的缺点,为开发高档户外帐篷布产品提供了理论参考。In order to further promote the hydrostatic pressure resistance of waterborne polyurethane coated fabric,polypropylene glycol(PPG)and polytetrahydrofuran(PTMEG)were used as mixed soft segments,dimethylol butyric acid(DMBA)was used as the hydrophilic chain extender,isophorone diisocyanate(IPDI)was used as the hard segment to prepare waterborne polyurethane coating agent with high hydrostatic pressure resistance.Double-terminated hydroxypropyl polysiloxane(DHPDMS)was employed to modify it,to prepare silicone modified waterborne polyurethane coating agent.The structure and properties of the coating agent were tested by FT-IR,XPS,video contact angle tester,universal material testing machine and water permeability tester.The effects of initial R value,soft segment ratio and DHPDMS mass fraction on the mechanical properties and hydrostatic pressure resistance of waterborne polyurethane and modified coating agent were discussed.The results showed that:when the initial R value of the reaction system was 1.5,the ratio of PPG/PTMEG was 1:2,the DHPDMS mass fraction was 5.0%,and the hydrostatic pressure resistance of coated fabric was up to 7500 mmH_(2)O.Compared with unmodified waterborne polyurethane,silicone-modified waterborne polyurethane can further improve the mechanical properties of coating and hydrostatic pressure resistance of coated fabrics.This silicone-modified waterborne polyurethane coating agent can improve the poor hydrostatic pressure resistance of traditional waterborne polyurethane coated fabric providing a theoretical reference for the development of high-grade outdoor tent fabric products.

关 键 词：有机硅改性 织物涂层剂 水性聚氨酯 耐静水压 防水性能 软段结构 

分 类 号：TS195.597[轻工技术与工程—纺织化学与染整工程]