木质素磺酸钙/海藻酸钠渗透汽化膜的制备及性能调控

doi:10.16085/j.issn.1000-6613.2020-2544

化工进展 ›› 2021, Vol. 40 ›› Issue (S1): 311-318.DOI: 10.16085/j.issn.1000-6613.2020-2544

木质素磺酸钙/海藻酸钠渗透汽化膜的制备及性能调控

李赛赛¹(), 詹硕¹, 李继定², 何静¹, 王璐莹¹()

^1.北京林业大学林木生物质化学北京市重点实验室，北京 100083
^2.清华大学化学工程国家重点实验室，北京 100084

收稿日期:2020-12-21 修回日期:2021-03-15 出版日期:2021-10-25 发布日期:2021-11-09
通讯作者: 王璐莹
作者简介:李赛赛（1994—），女，博士研究生，研究方向为分离膜。E-mail：2681718092@qq.com。
基金资助:
国家自然科学基金(21736001);中央高校基本科研业务费专项资金(2019ZY01);北京林业大学“国家级大学生创新创业训练计划”(201810022056)

Preparation and performance control of calcium lignosulfonate/sodium alginate pervaporation membrane

LI Saisai¹(), ZHAN Shuo¹, LI Jiding², HE Jing¹, WANG Luying¹()

^1.Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
^2.State Key Laboratory of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received:2020-12-21 Revised:2021-03-15 Online:2021-10-25 Published:2021-11-09
Contact: WANG Luying

摘要/Abstract

摘要：

当前石化资源遇到储量有限、利用过程对环境不友好等挑战，生物质燃料乙醇作为一种替代性能源崭露头角。渗透汽化是一种分离乙醇的方式，节能、环保，开发天然高选择性渗透汽化膜成为研究热点之一。本文提出利用木质素磺酸钙（CaLS）的亲水性和成膜性，将其与天然多糖海藻酸钠（SA）进行共混，制备了不同CaLS含量的CaLS/SA交联膜。采用傅里叶红外、X射线衍射、接触角和扫描电子显微镜等方法对交联膜进行了表征和分析。结果表明，CaLS能与SA充分均匀混合，并且CaLS的加入能提高SA膜的亲水性。进一步考察了CaLS添加量和操作温度对10%水含量的乙醇溶液分离性能的影响，当CaLS/SA质量比为5%时，CaLS/SA交联膜分离因子达到2872，渗透通量达到796g/(m² · h)，较纯SA膜分别提高了160%和70%，证实了CaLS在膜分离领域的应用潜力。

关键词: 海藻酸钠, 木质素磺酸钙, 膜, 渗透蒸发, 醇

Abstract:

At present, petrochemical resources are subject to challenges such as limited reserves and environmentally unfriendly utilization process. Biomass fuel ethanol can begin to emerge as an alternative energy source. Pervaporation is a way to separate ethanol, which is energy-saving and environmentally friendly. The development of natural highly selective pervaporation membranes has become one of the research hotspots This project proposes to utilize the hydrophilicity and membrane-forming properties of calcium lignosulfonate (CaLS), it was blended with natural polysaccharide sodium alginate (SA) to prepare CaLS/SA blend membranes with different CaLS content. The blend membrane was characterized and analyzed by Fourier transform infrared, X-ray diffraction, contact angle and scanning electron microscope methods. Analysis shows that CaLS and SA are fully and uniformly mixed, and the introduction of CaLS can improve the hydrophilicity of the SA membrane. The effects of CaLS content and operating temperature on the separation performance of ethanol solution with 10% water content were further investigated. The results show that when mass ratio of CaLS/SA is 5%, the separation factor of CaLS/SA blend membrane reaches 2872 and the permeation flux reaches 796g/(m² · h), which is 160% and 70% higher than pure SA membrane respectively, confirming the calcium lignosulfonate application potential in the field of membrane separation.

Key words: sodium alginate, calcium lignosulfonate, membrane, pervaporation, alcohol

中图分类号:

TQ028.4

李赛赛, 詹硕, 李继定, 何静, 王璐莹. 木质素磺酸钙/海藻酸钠渗透汽化膜的制备及性能调控[J]. 化工进展, 2021, 40(S1): 311-318.

LI Saisai, ZHAN Shuo, LI Jiding, HE Jing, WANG Luying. Preparation and performance control of calcium lignosulfonate/sodium alginate pervaporation membrane[J]. Chemical Industry and Engineering Progress, 2021, 40(S1): 311-318.

图/表 10

图1 木质素磺酸钙分子示意图

图2 SA膜和CaLS/SA交联膜的XRD和红外谱图

图3 膜表面和断面电镜图

图4 不同CaLS添加量的CaLS/SA膜的水接触角

图5 纯SA膜和CaLS/SA交联膜（CaLS添加量为5%）在不同乙醇浓度的溶胀度

图6 不同CaLS含量的交联膜的渗透汽化性能

图7 操作温度对纯SA膜和CaLS/SA交联膜渗透汽化性能的影响

图8 操作温度对CaLS/SA交联膜料液各分通量的影响

图9 纯SA膜和CaLS/SA交联膜的Arrhenius图

表1 改性SA渗透汽化膜脱水性能比较

膜	料液温度/℃	乙醇体积分数/%	渗透通量/g · m^-2 · h^-1	分离因子	PSI/10⁵	文献
SA-MoS₂	90	76	1839	1229	22.58	［17］
SA-GO	90	76	1604	1559	24.99	［18］
SA-PAA-Fe₃O₄	90	76	1634	1044	17.04	［19］
SA-ZIF-L	90	76	1218	1840	22.40	［20］
SA-AC	87.5	70	240	4044	9.70	［21］
SA-CaLS	70	90	796.5	2872	22.9	本文

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木质素磺酸钙/海藻酸钠渗透汽化膜的制备及性能调控

Preparation and performance control of calcium lignosulfonate/sodium alginate pervaporation membrane

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