文献类型：期刊文献

中文题名：超滤膜分级对木质素磺酸盐作为抑尘剂性能的影响

英文题名：Effect of Ultrafiltration Fractionation on Performance of Lignosulfonate as Dust Suppressant

作者：江昕昳[1] 王冠华[1,2] 杭家慧[1] 王丹[3] 司传领[1]

第一作者：江昕昳

机构：[1]天津科技大学造纸学院天津市制浆造纸重点实验室;[2]浙江科技学院浙江省废弃生物质循环利用与生态处理技术重点实验室;[3]中国林业科学研究院林产化学工业研究所国家林业局林产化学工程重点开放性实验室

年份：2017

卷号：37

期号：6

起止页码：133-140

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：天津科技大学大学生创新创业训练计划项目(201610057119);天津市制浆造纸重点实验室开放基金(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)

语种：中文

中文关键词：木质素磺酸盐;分子质量;分级;抑尘性能

外文关键词：lignosulfonate ; molecular weight ; fractionation; performance of dust suppressant

分类号：TQ35

摘要：采用截留分子质量为6 000和20 000 u的两种超滤膜对木质素磺酸盐进行过滤分级,获得3种不同分子质量木质素磺酸盐级分(LG-1、LG-2和LG-3),分析了各级分的得率、纯度、分子质量及亲水基团含量,并考察了各级分作为抑尘剂的性能差异。结果表明:通过超滤膜过滤可以对木质素磺酸盐进行有效分级,LG-1、LG-2和LG-3的得率分别为58.32%、24.50%和17.18%,重均相对分子质量分别为4 841,15 239和37 768,分散度(M_w/M_n)分别为2.78、2.40和2.06。随着木质素磺酸盐级分相对分子质量增加,灰分含量降低,总糖含量增加;同时磺酸基团含量降低。超滤膜分级对木质素磺酸盐作为抑尘剂的性能具有显著的影响,随着截留分子质量的增加,木质素磺酸盐吸湿能力、抗压及抗风蚀能力都有所提高,分别提高了96.43%、55.11%和63.07%,表明高分子质量木质素磺酸盐级分(LG-3)作为抑尘剂表现出更好的性能。SEM分析表明,喷洒木质素磺酸盐溶液后,沙粒之间有粘结层,表现出一定的粘结性和结壳性,且截留分子质量越大粘结现象越明显。
Three lignosulfonate fractions （LG-1, LG-2 and LG-3 ） were obtained by ultrafiltration with two cut-off molecular weight membrane of 6 000 and 20 000 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 uhrafiltration 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 4 841, 15 239 and 37 768 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% and63.07%, 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.