羧基/磺酸基含量对聚羧酸盐水煤浆分散剂性能的影响  

Influence of —COO^(-1)/—SO_3^(-1) ratio to polycarboxylate dispersants on dispersity of CWS

作　　者：王睿[1] 张光华[1] 朱军峰[1] 何志琴[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,西安710021

出　　处：《功能材料》2016年第3期115-119,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21176148;21303098);陕西省科技攻关资助项目(2014K10-01);陕西省科技厅自然科学基金资助项目(2014JM2040)

摘　　要：以甲基丙烯酸(MAA)、烯丙基磺酸钠(SAS)按一定比例合成了5种含有不同—COO^(-1)/—SO_3^(-1)比值的聚羧酸盐水煤浆分散剂PMAS系列。并通过红外光谱(FT-IR)、凝胶渗透色谱(GPC)进行了表征。并将其作用于彬长煤制浆,在用量0.4%(质量分数)时,水煤浆浆浓为65%时,考察了浆体的表观黏度与—COO^(-1)/—SO_3^(-1)比值的关系,在不同浓度下的zeta电位以及pH值对水煤浆应用的影响等。结果表明,当—COO^(-1)/—SO_3^(-1)比值为约3.238时,浆体的表观粘度最低,稳定性理想,此时浆体的zeta电位能达到-38mV,水煤浆粘度随着pH值的增大逐渐降低,当pH值大于10时水煤浆粘度趋于稳定。Using methacrylic acid(MAA),allyl sulfonate(SAS)prepared five kinds of anionic CWS dispersants PMAS,with different—COO^(-1)/—SO_3^(-1) ratio.Their structures,molecular weights and distributions were characterized and analyzed by FT-IR,gel permeation chromatography(GPC).The relation between —COO^(-1)/—SO_3^(-1) ratio with apparent viscosity,zeta potential and stability of the slurry were investigated,when the dispersants were used for Binchang coal to prepare CWS with 65wt% solid content and 0.4wt% dosage solid content.And the effect of pH on coal water slurry applications.was discussed.It showed the synthesized PC dispersant under the—COO^(-1)/—SO_3^(-1) ratio of 3.238,the CWS exhibited optimized apparent viscosity and stability,zeta potential can reach-38 mV.The coal water slurry apparent viscosity gradually reduced with the increase of pH,and went to stability when pH greater than 10.

关 键 词：聚羧酸盐 分散 羧基 磺酸基 PH值 

分 类 号：TQ536.9[化学工程—煤化学工程]