文章摘要
张光华,杨冬冬,杜伦.两种不同羧酸单体的两性聚羧酸盐水煤浆分散剂的制备及性能对比[J].精细化工,2020,37(11):
两种不同羧酸单体的两性聚羧酸盐水煤浆分散剂的制备及性能对比
Preparation and performance comparison of two amphoteric polycarboxylate salt coal slurry dispersants with different carboxylic acid monomers
投稿时间:2020-06-05  修订日期:2020-07-21
DOI:
中文关键词: 羧酸单体  阳离子  两性聚羧酸盐分散剂  水煤浆  表观黏度  稳定性  功能材料
英文关键词: Carboxylic acid monomer  cation  Amphoteric Polycarboxylate Dispersant  Coal water slurry  Apparent viscosity  stability  stability  functional materials
基金项目:
作者单位E-mail
张光华 陕西科技大学陕西省轻化工助剂重点实验室 zhanggh@sust.edu.cn 
杨冬冬 陕西科技大学陕西省轻化工助剂重点实验室  
杜伦 陕西科技大学陕西省轻化工助剂重点实验室  
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中文摘要:
      以烯丙基醇聚氧乙烯醚500(APEG-500)、羧酸单体 (丙烯酸和衣康酸)、二甲基二烯丙基氯化铵(DMDAAC)等为原料,合成了具有不同羧酸单体的两性聚羧酸盐水煤浆分散剂。采用FTIR、1HNMR对分散剂的结构进行表征,并结合水煤浆黏度、XPS、Zeta电位、接触角、稳定性等测试,讨论了不同羧酸单体对分散剂的分散性能的影响,探究了分散剂与煤粒表面的作用机理。结果表明:当DMDAAC用量为单体质量之和的6.0%时 ,两性聚羧酸盐分散剂对水煤浆的表观黏度降低效果优于阴离子型的聚羧酸盐分散剂;羧酸单体为衣康酸的分散剂性能更优,使陕西榆林煤最大固体质量分数达到66.5%,Zeta电位由-20.8 mV变化到-31.9 mV,吸附膜厚度和饱和吸附量分别为2.56 nm和3.23 mg/g,对煤粒的润湿性更好,浆体的稳定性显著提高,表明双羧基比单羧基更能提高分散剂性能。
英文摘要:
      Amphoteric polycarboxylate brine coal slurry dispersant with different carboxylic acid monomers were synthesized as allyl alcohol polyoxyethylene ether 500 (APEG-500), carboxylic acid monomers(Acrylic and Itaconic Acid), dimethyl diallyl ammonium chloride (DMDAAC) and other raw materials. FTIR and 1HNMR were used to characterize the dispersant. The dispersant’s dispersion performance and its mechanism of action were tested by the viscosity of coal water slurry, XPS, Zeta potential, contact angle, stability, etc. The results show that when the amount of DMDAAC was 6.0% of the total mass of monomers, the effect of amphoteric polycarboxylate dispersant on reducing the apparent viscosity of coal water slurry was better than that of anionic dispersant; the performance of carboxylic acid monomer as itaconic acid was notable, the maximum solid mass fraction of Yulin coal in Shaanxi reaches 66.53%, the Zeta potential changes from -20.8 mV to -31.9 mV, the thickness of the film and the saturated adsorption capacity were 2.56 nm and 3.23 mg/g respectively, the wettability of the coal particles was better, and the stability of the slurry was significantly improved. Indicating that the dicarboxyl group can improve the performance of the dispersant more than the monocarboxyl group.
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