林产化学与工业2017，Vol.37Issue(6)：133-140,8.DOI:10.3969/j.issn.0253-2417.2017.06.018
超滤膜分级对木质素磺酸盐作为抑尘剂性能的影响
Effect of Ultrafiltration Fractionation on Performance of Lignosulfonate as Dust Suppressant
摘要
Abstract
Three lignosulfonate fractions ( LG-1, LG-2 and LG-3 ) were obtained by ultrafiltration with two cut-off molecular weight membrane of 6000 and 20000 u. The yield, purity, molecular weight and hydrophilic group content of lignosulfonate fractions were characterized and the performances of lignosulfonate fractions as dust suppressant were also compared. The results showed that ultrafiltration could effectively fractionate the lignosulfonate and the yields of LG-1, LG-2 and LG-3 were 58. 32% , 24. 50% and 17. 18% , respectively. The weight average molecular weights of the three fractions were 4841, 15239 and 37768 and the polydispersities were 2. 78, 2. 40 and 2. 06, respectively. With the increase of lignosulfonate molecular weight, the ash and sulfonic acid group content decreased while the total sugar content increased. The ultrafiltration fractionation had significant effects on the performance of lignosulfonate as dust suppressant. With the increase of molecular weight cut-off, the water absorption capacity, compression strength and anti-wind erosion ability of lignosulfonate increased by 96. 43% , 55. 11% and 63. 07% , respectively, which suggested that lignosulfonate fraction LG-3 with higher molecular weight performed better as dust suppressant. SEM analysis suggested that after spraying of lignosulfonate solution, a bonding layer was formed between sand grains and played the role of cohesiveness and incrustation for the sand grains. Moreover, the phenomenon was more obvious with the increase of lignosulfonate molecular weight.关键词
木质素磺酸盐/分子质量/分级/抑尘性能Key words
lignosulfonate/molecular weight/fractionation/performance of dust suppressant分类
化学化工引用本文复制引用
江昕昳,王冠华,杭家慧,王丹,司传领..超滤膜分级对木质素磺酸盐作为抑尘剂性能的影响[J].林产化学与工业,2017,37(6):133-140,8.基金项目
天津科技大学大学生创新创业训练计划项目(201610057119) （201610057119）
天津市制浆造纸重点实验室开放基金(201607) （201607）
浙江省废弃生物质循环利用与生态处理技术重点实验室开放基金(2016REWB21) （2016REWB21）
