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林产化学与工业 ›› 2017, Vol. 37 ›› Issue (6): 133-140.doi: 10.3969/j.issn.0253-2417.2017.06.018

• 研究报告 • 上一篇    

超滤膜分级对木质素磺酸盐作为抑尘剂性能的影响

江昕昳1, 王冠华1,2, 杭家慧1, 王丹3, 司传领1   

  1. 1. 天津科技大学 造纸学院;天津市制浆造纸重点实验室, 天津 300457;
    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, 浙江 杭州 310023;
    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, 江苏 南京 210042
  • 收稿日期:2017-05-08 出版日期:2017-12-25 发布日期:2018-01-05
  • 通讯作者: 王冠华,助理研究员,博士,主要从事木质素高值化利用研究;E-mail:ghwang@tust.edu.cn E-mail:ghwang@tust.edu.cn
  • 作者简介:江昕昳(1996-),女,四川成都人,本科生,研究方向为生物质精炼
  • 基金资助:
    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)

Effect of Ultrafiltration Fractionation on Performance of Lignosulfonate as Dust Suppressant

JIANG Xinyi1, WANG Guanhua1,2, HANG Jiahui1, WANG Dan3, SI Chuanling1   

  1. 1. Tianjin Key Laboratory of Pulp & Paper;College of Paper Making Science and Technology, Tianjin University of Science and Technology, Tianjin 300457, China;
    2. Key Laboratory of Recycling and Eco-treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science and Technology, Hangzhou 310023, China;
    3. Institute of Chemical Industry of Forest Products, CAF;Key and Open Lab. of Forest Chemical Engineering, SFA, Nanjing 210042, China
  • Received:2017-05-08 Online:2017-12-25 Published:2018-01-05

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(Mw/Mn)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。

关键词: 木质素磺酸盐, 分子质量, 分级, 抑尘性能

Abstract: 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 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 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% 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.

Key words: lignosulfonate, molecular weight, fractionation, performance of dust suppressant

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