环氧大豆油多元醇改性磺酸型水性聚氨酯合成与性能研究  

Synthesis and Properties of Sulfonated Waterborne Polyurethane Modified by ESO-based Polyols

作　　者：盛松松 蒋平平 张萍波 高学文 唐敏艳 俞晓琴 包燕敏 

机构地区：[1]食品胶体与生物技术教育部重点实验室江南大学化学与材料工程学院,无锡214122 [2]嘉和实业(苏州)有限公司,苏州215021 [3]昆山嘉力普制版粘合剂油墨有限公司,昆山215300

出　　处：《高分子学报》2016年第11期1587-1593,共7页Acta Polymerica Sinica

基　　金：江苏省产学研联合创新资金项目(项目号BY2014023-08)资助

摘　　要：用2-乙基己醇(异辛醇)对环氧大豆油进行开环,生成环氧大豆油多元醇,并利用其对由异佛尔酮二异氰酸酯(IPDI)、聚己内酯二元醇(PCL)和乙二胺基乙磺酸钠(AAS)为主要合成原料的磺酸型水性聚氨酯(SWPU)进行改性,考察了不同多元醇含量对磺酸型水性聚氨酯乳液以及胶膜性能的影响.首先,通过FTIR和1H-NMR证实了环氧大豆油多元醇的合成;然后经过粒径测试、耐水性测试、接触角测试、机械性能测试、TG测试等检测表明:磺酸型水性聚氨酯成功合成,随着多元醇含量的增加,水性聚氨酯乳液粒径逐渐增大;胶膜的吸水率逐渐减小,并趋于平缓;力学性能拉伸强度逐渐增强,而断裂伸长率下降.但当环氧大豆油多元醇添加量过大时,导致最后乳液无法分散,乳化失败.当多元醇含量与PCL质量比为0.2时,胶膜吸水率由50.14%减小至12.27%,接触角为103.3°,拉伸强度由8.16 MPa增至21.77 MPa.通过TG表明,分子结构中多元醇的引入,胶膜的耐热性有明显提高.Polyols based epoxidized soybean oil was synthesized by ring-opening addition reaction of epoxidized soybean oil with 2-ethyl hexanol （isooctanol）. Then sulfonated waterborne polyurethane was synthesized using isophorone diisocyanate （IPDI）, polycaprolactone diol （PCL）, ethylenediamine sodium acetate （AAS） and the ESO-based polyols, and the film had been fabricated successfully by using the obtained waterborne polyurethane as the binder. Polyols was characterized by FTIR and 1H-NMR, which indicated polyols was successfully synthesized in the experiment. Influence of the content of polyols on the properties of sulfonated waterborne polyurethane emulsions and their films was evaluated by a series of measurements, including particle size test, water absorption test, static contact angle test, mechanical performance test and TGA. The results showed that the sulfonated waterborne polyurethane modified by ESO-based polyols had been successfully synthesized confirmed by FTIR,and with the increase of the content of polyols,the particle size of the sulfonated waterborne polyurethane emulsion increased gradually,the water absorption of the film decreased and then flatten out when the content of polyols continued to increase during the fabrication of the modified sulfonated waterborne polyurethane. Furthermore, the tensile strength of the film of sulfonated waterborne polyurethane increased, and elongation at break decreased with the increase of the content of polyols. However, too large amount of polyols in the synthesis process of sulfonated waterborne polyurethane would result in destabitization of the emulsion dispersion and lead to failure of the emulsion at last. The film of sulfonated waterborne polyurethane presented the superior performance when the mass ratio of polyols and PCL was 0.2. Water absorption rate of the film decreased from 50. 14% to 12.27% ,the water contact angle came to 103.3~, and the tensile strength increased greatly from 8.16 MPa to 21.77 MPa as the mass ratio of polyols and PCL

关 键 词：磺酸型水性聚氨酯 环氧大豆油 力学性能 接触角 热重分析 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]