摘要
以天然玉米淀粉为主链,与3种单体进行接枝共聚,制备出一种新型淀粉接枝共聚物。将它作为分散剂应用于神华煤制备水煤浆,并和萘系分散剂进行对比。探讨改性淀粉对浆体的表观黏度、流变性及吸附量的影响。该分散剂用量为0.4%时,可以制备66%浓度的水煤浆,表观黏度为943 m Pa·s,符合国家标准;改性淀粉在神华煤表面的饱和吸附量为2.61 mg/g,比萘系分散剂具有更好的分散、稳定和降黏作用。结合改性淀粉和神华煤的结构特点,阐述了吸附作用机理。
A new starch graft copolymer was synthesized by using starch as the main raw material and polymerizing with three monomers,acrylic acid,sodium styrene sulfonate and maleic acid-polyethylene glycol monoester,using sodium bisulfite and potassium persulfate redox system.The performance of Shenhua coal water slurry prepared with this modified starch-based coal water slurry dispersant was compared with that of naphthalene dispersant.The results showed that the highest concentration of slurry could reach 66%when the dosage was 0.4%.The prepared slurry had excellent dispersibility and apparent viscosity of 943 m Pa·s,which was better than naphthalene dispersant.The saturated adsorption capacity of the modified starch-based coal water slurry dispersant on Shenhua coal was 2.61 mg/g,which was higher than that of naphthalene dispersant(1.88 mg/g).Combining with the structural characteristics of the dispersant and Shenhua coal,the adsorption mechanism was expounded.
作者
朱妞
张光华
赵方
ZHU Niu;ZHANG Guang-hua;ZHAO Fang(Xi’an Medical University,Shaanxi Xi'an 710021,China;Shaanxi University of Science and Technology,Shaanxi Xi'an 710021,China)
出处
《当代化工》
CAS
2019年第9期1979-1982,共4页
Contemporary Chemical Industry
基金
国家自然科学基金项目,项目号:21176148
陕西省科学技术研究发展计划项目,项目号:2009K02-06
关键词
淀粉
接枝共聚
水煤浆
分散剂
环保
Starch
Graft copolymerization
Coal water slurry
Dispersant
Environmental protection
作者简介
朱妞(1983-),女,湖南省邵阳市人,讲师,博士,2017年毕业于陕西科技大学应用化学专业,研究方向:功能高分子材料合成、改性、机理及应用。E-mail:suro@xiyi.edu.cn。
