柠檬酸化壳寡糖改性水性聚氨酯的合成与性能  

Synthesis and Properties of Chitosan-Citrate Based Waterborne Polyurethane

作　　者：任龙芳 赵永霞[1,2] 强涛涛 赵丹妮[1] Xiaowei Chen;Shangtao Chen;Lingpu Meng;Yanfang Wang(National Synchrotron Radiation Lab,Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film,CAS Key Laboratory of Soft Matter Chemistry,University of Science and Technology of China,Hefei 230029,China;SINOPAC Research Institute of Petroleum Processing,Beijing 102206,China)

机构地区：[1]陕西科技大学轻工科学与工程学院中国轻工业皮革清洁生产重点实验室,陕西西安710021 [2]轻化工程国家级实验教学示范中心(陕西科技大学),陕西西安710021

出　　处：《高分子材料科学与工程》2019年第5期7-12,19,共7页Polymer Materials Science & Engineering

基　　金：陕西省科技计划项目(2018JM5164);陕西高校青年创新团队;陕西高校新型智库

摘　　要：以异佛尔酮二异氰酸酯(IPDI)与聚四氢呋喃醚二醇(PTMG-2000)为主要原料,二羟甲基丙酸(DMPA)为亲水扩链剂,柠檬酸化壳寡糖(CA-COS)为改性剂,合成了柠檬酸化壳寡糖型水性聚氨酯(CCOS-WPU)。以乳液和胶膜的基本性能为指标,对反应条件进行了优化,通过傅里叶变换红外光谱对胶膜的结构进行了表征,用X射线衍射和热重分析对胶膜的结晶度和热稳定性进行了分析。结果表明,当n(NCO)∶n(OH)为4∶1,DMPA用量为5.0%,CA-COS用量为1.0%时,CCOS-WPU乳液粒径为57.57 nm,CCOS-WPU乳液及胶膜的综合性能较好,相比未改性的WPU,胶膜的拉伸强度从15.84 MPa提高到16.34 MPa,CA-COS的加入可使聚氨酯的结晶能力下降,耐热性明显提高。Chitosan-citrate based waterborne polyurethane(CCOS-WPU)emulsion was prepared with isophorone diisocyanate(IPDI)and poly tetrahydrofuran ether glycol(PTMG)as main raw material,dimethylolpropionic acid(DMPA)as hydrophilic chain extender,chitosan citrate(CA-COS)as modifier.Based on the basic properties of emulsions and films,the reaction conditions were optimized.The structure of film was characterized by FT-IR and the crystallinity and thermal stability of WPU and CCOS-WPU films were studied by X-ray diffraction(XRD)and thermogravimetric analysis(TGA).The results show that the comprehensive properties of CCOS-WPU emulsions and films are better when the n(NCO)∶n(OH)is 4∶1,the dosage of DMPA is 5.0%and CA-CCOS dosage is 1.0%.The particle size of CCOS-WPU emulsion is 57.57 nm.Compared with non-modified WPU,the tensile strength of CCOS-WPU film increases to 16.34 MPa from 15.84 MPa.Meanwhile,the addition of CA-COS can significantly improve the heat resistance and decrease the crystallinity of CCOS-WPU films.

关 键 词：柠檬酸化壳寡糖 水性聚氨酯 合成 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]