CAJ | 학술논문

以甲基丙烯酸（MAA）和4种不同侧链长度的甲氧基聚乙二醇（MPEG相对分子质量分别为350，500，750，1000）先聚合得到酯化大单体（MPEGMAA），再以甲基丙烯酸，烯丙基磺酸钠（SAS）为单体，在引发剂过硫酸钾，阻聚剂对苯二酚作用下聚合得到4种具有不同侧链长度的聚羧酸盐分散剂。通过红外（FT-IR）、核磁共振氢谱（1H NMR）和凝胶渗透色谱（GPC）对聚合物的结构、相对分子质量及其分布进行了表征和分析，并将其作用于彬长煤制浆，考察了浆体的表观黏度、流变性、zeta 电位、吸附性以及最大成浆浓度和稳定性，测定其与煤的接触角，并通过X射线光电子能谱（XPS）分析，得出煤粒表面吸附分散剂后的吸附层厚度为6.12 nm。结果表明，侧链长度为SAS/MAA/MPEGMAA750的聚羧酸盐分散剂具有良好的润湿和吸附效果，对彬长煤具有更好的降黏、分散和稳定作用。
이갑기병희산（MAA）화4충불동측련장도적갑양기취을이순（MPEG상대분자질량분별위350，500，750，1000）선취합득도지화대단체（MPEGMAA），재이갑기병희산，희병기광산납（SAS）위단체，재인발제과류산갑，조취제대분이분작용하취합득도4충구유불동측련장도적취최산염분산제。통과홍외（FT-IR）、핵자공진경보（1H NMR）화응효삼투색보（GPC）대취합물적결구、상대분자질량급기분포진행료표정화분석，병장기작용우빈장매제장，고찰료장체적표관점도、류변성、zeta 전위、흡부성이급최대성장농도화은정성，측정기여매적접촉각，병통과X사선광전자능보（XPS）분석，득출매립표면흡부분산제후적흡부층후도위6.12 nm。결과표명，측련장도위SAS/MAA/MPEGMAA750적취최산염분산제구유량호적윤습화흡부효과，대빈장매구유경호적강점、분산화은정작용。
The esterified macromonmer (MPEGMAA) was obtained by esterification of methoxy polyethylene glycol (MPEG) with four kinds of different side chain lengths and methacrylic acid (MAA). Four kinds of different side chain lengths of polycarboxylate dispersants were prepared from esterified macromonmer (MPEGMAA), methacrylic acid (MAA), allyl sulfonate (SAS) as monomers, potassium persulfate (K2S2O8) as initiator and hydroquinone as inhibitor. Their structures, molecular weights and distributions were characterized and analyzed by FT-IR, 1H NMR and gel permeation chromatography (GPC). The dispersants were used for Binchang coal, and apparent viscosity, rheology, zeta potential, adsorption, maximum slurry concentration and stability of the slurry were investigated. The contact angles between coal surface and dispersant were measured, and the surface of coal particles after adsorbing the dispersant with was analyzed with X-ray photoelectron spectroscopy (XPS), with the thickness of adsorption layer of 6.12 nm. The polycarboxylate dispersant with the length of side chain SAS/MAA/MPEGMAA750 showed good wetting and adsorption, as well as better function of viscosity reduction, dispersion and stabilization on Binchang coal.