聚苯硫醚负载离子液体的合成与表征研究

Study on synthesis and characterization of polyphenylene sulfide supported ionic liquids

通过超高性能纤维聚苯硫醚(PPS)高分子链上改进的Blanc反应,制备了一种新型的催化剂载体材料氯甲基化PPS纤维(CM-PPSF),并初步探讨了其作为离子液体载体的性能。分别考察了反应温度、时间和底物浓度等,对PPS纤维氯甲基功能化修饰度的影响;并利用元素分析、傅里叶变换红外光谱(FT-IR)和扫描电镜(SEM)等检测手段,对氯甲基化前后的纤维试样进行了结构与性能的表征。结果表明,以1,2-二氯乙烷为溶胀剂,氯甲醚为氯甲基化试剂,四氯化锡作为催化剂,60℃下反应72 h,纤维增重达12.5%,氯甲基含量可达2.29 mmol/g;在此基础上制备出纤维固载咪唑基离子液体。上述CM-PPSF制备过程简单,功能基含量高,且便于催化剂的固载化,将其用作一类新型的载体材料,为设计新型固载催化剂提供了思路,具有广阔的研究空间和显著的创新性。

In this paper, chloromethylated PPS fber （CM-PPSf） which is a new catalyst carrier material was prepared through the Blanc reaction on the ultra-high performance fber polyphenylene sulfde （PPS） polymer chain. And its performance as an ionic liquid carrier was preliminarily studied too. This paper investigated the effects of reaction temperature, time and substrate concentration on the functional modifcation of PPS fber chloromethyl, and used detection means of elemental analysis, fourier transform infrared spectroscopy （fT-IR） and scanning electron microscopy （SEM） to characterizes the structure and properties of the fber sample before and after chloromethylation. The results showed that using 1,2-dichloroethane as the swelling agent, using chloromethyl ether as the chloromethylation reagent, and use tin tetrachloride as the catalyst, and then carried out reaction at 60 ℃ for 72 h, through the above process, the fber weight gain 12.5% and the chloromethyl content reachs 2.29 mmol/g. finally, the fber imidazolium imidazolyl ionic liquid was prepared on this basis. CM-PPSf has a simple preparation process, high functional group content, and facilitates the immobilization of the catalyst. CM-PPSf can be used as a new type of carrier material, which provides a new idea for designing new supported catalysts with broad research space and remarkable innovation.