摘要
通过沉淀聚合,以异佛尔酮二异氰酸酯(IPDI)为单体,质量比为3:7的水与丙酮的混合溶液为溶剂,Si O2纳米颗粒为模板制备Si O2/聚脲复合微球,用Na OH溶液刻蚀掉Si O2后得到聚脲多孔微球。固定IPDI用量,改变模板Si O2纳米颗粒的用量制取聚脲多孔微球,用扫描电子显微镜观察微球的形貌,并对聚脲多孔微球的粒径、单分散性进行了测算。结果表明,不加Si O2纳米颗粒制得的实心聚脲微球粒径不均一,加入Si O2纳米颗粒后,制得的聚多孔脲微球的粒径增大,单分散性提高。
Highly uniform porous polyurea microspheres were prepared through precipitation polymerization using isophorone diisocyanate（ IPDI） as monomer and SiO2 nanoparticles as template in the mixture of H2O / acetone at mass ratio of 3/7,and followed by removing SiO2 nanoparticles using Na OH solution. The amount of SiO2 in the polymerization reaction was changed and IPDI content was constant. The morphology of the microspheres was observed by scanning electron microscopy（ SEM）. Particle size and its distribution of porous polyurea microspheres prepared in the different conditions were examined. Results indicated that the polyurea microspheres prepared without SiO2 nanoparticles addition was not uniform.The uniform polyurea porous microspheres could be obtained with the addition of SiO2 nanoparticles,and the size of the microspheres increased.
出处
《山东化工》
CAS
2015年第4期3-5,共3页
Shandong Chemical Industry
基金
国家自然科学基金资助项目(51473066)
