论文部分内容阅读
采用乙二胺部分还原修饰氧化石墨烯(GO)获得EGO,作为改性剂,以异氟尔酮二异氰酸酯、聚醚二元醇、羟基硅油(HPMS)、二羟甲基丙酸等主要原料首先合成含硅线性聚氨酯(HPMS/LPU),然后将其接枝在实验室自制多羟基超支化聚氨酯核(HBPU-0)上,最后与EGO反应,制备了乙二胺化GO改性的含硅超支化聚氨酯(EGO-HPMS/HBPU)。利用FTIR、Raman、XRD、XPS、TEM、AFM、SEM、TG等分别对EGO-HPMS/HBPU三元复合乳液及其胶膜形貌和性能进行了表征,并研究了EGO与羟基硅油含量对EGO-HPMS/HBPU复合材料综合性能的影响。结果表明,当添加0.5 wt%EGO时,变量为HPMS时,EGO在聚氨酯基体中稳定分散,与单一改性材料相比,其协同改性复合材料EGO-4wt%HPMS/HBPU综合性质最佳,此时,其不同失重条件下热解温度的提高展示材料好的稳定性,24 h吸水率降至5.13%,水接触角为101.3°,EGO-4wt%HPMS/HBPU的拉伸强度与断裂伸长率分别为11.18 MPa,553.2%,获得了疏水手感光滑柔软的复合产品。
Ethylenediamine partial reduction modified graphene oxide (GO) to obtain EGO as a modifier, with isophorone diisocyanate, polyether glycol, hydroxy silicone oil (HPMS), dimethylolpropionic acid and other major raw materials First, silicon-containing linear polyurethane (HPMS / LPU) was synthesized, which was then grafted on a lab-made polyhydroxy hyperbranched polyurethane core (HBPU-0) and finally reacted with EGO to prepare ethylenediamine- Silicon Hyperbranched Polyurethane (EGO-HPMS / HBPU). The morphology and properties of EGO-HPMS / HBPU ternary composite emulsion and its films were characterized by FTIR, Raman, XRD, XPS, TEM, AFM, SEM and TG. -HPMS / HBPU composites. The results showed that when 0.5wt% EGO was added, EGO was dispersed stably in polyurethane matrix when HPMS was used. Compared with single modification, EGO-4wt% HPMS / HBPU had the best comprehensive properties. At this time, the improvement of pyrolysis temperature under different weightlessness conditions shows the good stability of the material, the water absorption decreases to 5.13% in 24 h and the water contact angle is 101.3 °. The tensile strength and elongation at break of EGO-4wt% HPMS / HBPU The length rates were 11.18 MPa and 553.2%, respectively, and a composite product with a smooth and soft hydrophobic surface was obtained.