CAJ | 학술논문

通过聚丙烯酰胺（PAM）微凝胶与羟甲基二甲胺进行Mannich反应,再与十二烷基溴进行季铵化反应,在磷钨酸水溶液中进行离子交换反应,成功制备了负载磷钨酸季铵盐催化剂的CPAM/PWA复合微球.通过红外光谱、光电子能谱、扫描电子显微镜等手段对复合微球进行表征,并研究了反应过程中不同反应条件对复合微球形貌及组成产生的影响。结果表明,所得CPAM/PWA复合微球表面光滑、球形保持;随着修饰程度提高,复合微球溶胀度变小;PAM与羟甲基二甲胺的配比是决定磷钨酸负载量的关键因素;该配比不仅影响复合微球对磷钨酸阴离子负载量,而且影响复合微球的溶胀性.
통과취병희선알（PAM）미응효여간갑기이갑알진행Mannich반응,재여십이완기추진행계안화반응,재린오산수용액중진행리자교환반응,성공제비료부재린오산계안염최화제적CPAM/PWA복합미구.통과홍외광보、광전자능보、소묘전자현미경등수단대복합미구진행표정,병연구료반응과정중불동반응조건대복합미구형모급조성산생적영향。결과표명,소득CPAM/PWA복합미구표면광활、구형보지;수착수식정도제고,복합미구용창도변소;PAM여간갑기이갑알적배비시결정린오산부재량적관건인소;해배비불부영향복합미구대린오산음리자부재량,이차영향복합미구적용창성.
Quaternary PAM microgel(CPAM) was synthesized by reaction of PAM microgel with hydroxymethyl dimethylammonia through Mannich reaction,and dodecyl bromide.The CPAM / PWA composites microspheres were obtained by ion-exchange of those quaterised microspheres(CPAM) in the HPW aqueous solution.The morphologies and compositions of the CPAM / PWA composite microspheres,as well as the effects of reaction conditions,were investigated by scanning electron microscopy(SEM),thermogravimetric analysis(TGA),X-ray photoelectron spectra(XPS) and Fouier transform infrared spectroscopy(FT-IR),respectively.The results indicate that the CPAM / PWA composite microspheres exhibit smooth surface and unchanged spherical shape,and swelling degree decreases with quaternary modification.The ratio of PAM to hydroxymethyl dimethylammonia is a key factor to affect not only the HPW loading,but also the swelling degree of CPAM / PWA composites microspheres.