高分子改性碳黑水相分散稳定性的动态光散射分析  

Dynamic light scattering analysis of the dispersion stability in water phase of polymer modified carbon black

作　　者：娄本浊[1] 

机构地区：[1]陕西理工学院物理与电信工程学院,陕西汉中723000

出　　处：《陕西理工学院学报（自然科学版）》2014年第4期41-45,共5页Journal of Shananxi University of Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(41105107);陕西省自然科学基础研究计划项目(2012JM5014);陕西省教育厅科学研究计划项目(2013JK0617)

摘　　要：利用动态光散射法测量并分析了改性碳黑在水相中的分散稳定性。研究结果表明:用PHS-T改性的纳米碳黑虽能稳定分散于水相中,但此时改性碳黑粒径较大;而在水相中PHS-b-PSt-T或PHS-b-PAA-T改性纳米碳黑比PHS-T改性纳米碳黑的分散稳定性高,且粒径也更小,其原因是共聚物PHS-b-PSt-T与PHS-b-PAA-T的链段间氢键作用力较弱且其分子量较小,降低了碳黑表面链段间彼此缠绕的可能性,使改性碳黑的聚集现象不明显,所以能得到粒径较小且分布稳定的结果。The dispersion stability in water phase of the polymer modified carbon black is analyzed by dynamic light scattering method. The results show that the PHS-T modified carbon black can be dispersed steadily in water phase,but its size is larger. However,the dispersion stability in water phase of PHS-b-PSt-T or PHS-b-PAA-T carbon black is much better than that of PHS-T modified carbon black and their sizes are smaller. This is because the weak hydrogen bond between segments and the small molecular weight of PHS-b-PSt-T or PHS-b-PAA-T reduce the possibility of winding between segments and then the carbon black particle aggregation becomes non-significant,so the particle size is smaller and has a stable distribution.

关 键 词：动态光散射 粒径测量 高分子改性碳黑 分散稳定性 水相 

分 类 号：TQ645.9[化学工程—精细化工]