摘要
以甲氧基聚乙二醇(MPEG,氧乙烯单元数为11,23)和甲基丙烯酸(MAA)为原料制得甲氧基聚乙二醇甲基丙烯酸酯化单体(MAAMPEG);再以该酯化单体、甲基丙烯酸和2-丙烯酰胺-2-甲基丙磺酸(AMPS)为原料,制得具有不同长度侧链的梳形聚羧酸盐(PC)分散剂AMPS/MAA/MAAMPEG(AMAPEG)。利用核磁共振氢谱(~1 H-NMR)、红外光谱仪(FT-IR)、凝胶渗透色谱仪(GPC)对分散剂分子的结构、分子质量及分布进行了表征;并将其和工业分散剂萘磺酸盐(NSF)用于彬长煤制水煤浆,结果表明,所得目标聚合物的Mw为2×10~4~3×10~4,分子量分散系数D在约为1.3,煤质量浓度为65%时,最佳用量为0.4%,浆体粘度约为447mPa·s,zeta电位达到-56mV,比萘磺酸盐具有良好的润湿效果,更好的降粘分散和稳定作用。
The methoxy polyethylene glycol methacrylate ester monomer （MAAMPEG） was prepared by methoxy polyethylene glycol （MPEG, ethylene oxide units of 11, 23） and methacrylic acid （MAA） as raw ma-terials. Comb-like polycarboxylate （PC） dispersants AMPS / MAA /MAAMPEG （AMAPEG） bearing side chains of different lengths were prepared using the esterification monomer, methacrylic acid,and 2-acrylamido- 2-methyl propane sulfonic acid （AMPS）. The structure, molecular weight and distribution of the polycarboxylate were characterized by infrared spectroscopy （FT-IR） , nuclear magnetic resonance spectroscopy C1 H-NMR） 9 gel permeation chromatography （GPC）. The PCs and naphthalene sulfonate （NSF） were applied to make Binchang coal-water slurry （CWS）. The results show that the Mw of the PC is 2 × 104 -3 × 104 and the dispersion coefficient D is about 1. 3. When the optimum dosage of dispersant is 0. 4 % 9 the highest concentration of CWS can reach 65 % , the viscosity slurry is about 447 mPa , s and zeta potential is -56 mV. The PC shows better wetting property and better dispersion viscosity as well as stability than the NSF disper-sant.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2017年第5期5205-5210,共6页
Journal of Functional Materials
基金
国家自然科学基金资助项目(21303098)
陕西省自然科学基金资助项目(2014JM2040)
陕西科技大学博士科研启动资助项目(BJ13-04)
关键词
聚羧酸盐
2-丙烯酰胺-2-甲基丙磺酸
甲氧基聚乙二醇
水煤浆
分散剂
polycarboxylates
2-acrylamide-2-methylpropanesulfonic acid
methoxy polyethylene glycol
coal-water slurry
dispersant
