阳离子球形聚电解质刷制备及其助留助滤性能分析

采用光乳液聚合法制得新型阳离子球形聚电解质刷（CSPBs）。先按照朔滕-鲍曼反应机理用甲甚丙烯酰氯和2-羟基-2-甲基苯丙酮制备光引发剂,之后将光引发剂负载在聚苯乙烯微球表面,最后将二甲基二烯丙基氯化铵（DMDAAC）接枝到带有光引发剂的微球表面。运用透射电子显微镜观察合成的CSPBs,其外观形貌均呈圆球形,平均粒径约为170nm。将合成的CSPBs作为助留助滤剂应用在造纸上,通过动态滤水实验对其助留助滤性能进行分析,实验表明：当其添加量为0.04wt%时得到最短的滤水时间（23.2s）;当其添加量为0.035wt%时,其最佳纸浆首程留着率（FPR）为70.89%。

Preparation and Performance of Cationic Spherical Polyelectrolyte Brushes as Retention and Drainage Aid in Papermaking

Novel cationic spherical polyelectrolyte brushes（CSPBs） were prepared by photoemulsion polymerization.Dimethyl diallyl ammonium chloride（DMDAAC） was grafted onto the surface of polystyrene particles bearing a thin layer of photo initiator that was prepared by Schotten-Baumann reaction of 2-hydroxy-2-methyl propiophenone and methacryloyl chloride. Transmission electron microscopy（TEM） was used to analyze the size and shape of CSPBs,the average diameter of these particles with uniform spherical structure was 170nm.A link to the use of this system as a model for retention and drainage aid in the papermaking process was described.Dynamic drainage experiment indicates that the shortest drainage time is 23.2s when the percentage of the aid is 0.04 wt%.The retention effect of the aid is tested that the highest of the first-pass retention is 70.89%when the percentage of the aid is 0.035 wt%.