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木质素掺入聚苯乙烯制备可持续性高吸水性树脂的协同效应

Synergistic effect of lignin incorporation into polystyrene for producing sustainable superadsorbent.

作者信息

Ghavidel Nasim, Fatehi Pedram

机构信息

Green Processes Research Centre and Chemical Engineering Department, Lakehead University 955 Oliver Road Thunder Bay ON Canada P7B5E1

出版信息

RSC Adv. 2019 Jun 5;9(31):17639-17652. doi: 10.1039/c9ra02526j. eCollection 2019 Jun 4.

DOI:10.1039/c9ra02526j
PMID:35520539
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9064571/
Abstract

Lignin has gained intensive interest as an excellent raw material for the generation of advanced green products. Polystyrene (PS) is known for its worldwide application in water purification processes. To induce a sustainable PS, kraft lignin (KL) and polystyrene were polymerized free radical polymerization in a facile aqueous emulsion process. KL enhanced surface area and porosity of PS. The physicochemical properties of induced KL-PS were analyzed, and the fate of lignin in KL-PS was discussed fundamentally. Wettability and surface energy analyses were implemented to monitor the surface properties of KL, PS and KL-PS. Incorporation of KL in PS (40 wt%) boosted its surface energy and oxygen content, which led to KL-PS with better compatibility than PS with copper ions in aqueous systems. A quartz crystal microbalance with dissipation (QCM-D) confirmed the noticeably higher adsorption performance of copper ion on KL-PS than on PS and KL. The sorption mechanism, which was revealed by FTIR studies, was primarily attributed to the coordination of Cu(ii) and hydroxyl group of KL-PS as well as the quadrupolar system of KL-PS.

摘要

木质素作为一种用于生产先进绿色产品的优质原料，已引起广泛关注。聚苯乙烯（PS）在全球水净化过程中有着广泛应用。为了制备可持续的PS，在一种简便的水乳液工艺中，通过自由基聚合将硫酸盐木质素（KL）与聚苯乙烯进行聚合。KL增加了PS的表面积和孔隙率。对诱导生成的KL-PS的物理化学性质进行了分析，并从根本上探讨了木质素在KL-PS中的归宿。进行了润湿性和表面能分析，以监测KL、PS和KL-PS的表面性质。在PS中加入40 wt%的KL提高了其表面能和氧含量，这使得KL-PS在水体系中与铜离子的相容性比PS更好。带有耗散功能的石英晶体微天平（QCM-D）证实，铜离子在KL-PS上的吸附性能明显高于在PS和KL上的吸附性能。傅里叶变换红外光谱（FTIR）研究揭示的吸附机制主要归因于KL-PS中Cu（II）与羟基的配位以及KL-PS的四极体系。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ffb/9064571/0c8c721f22ac/c9ra02526j-f8.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2ffb/9064571/0c8c721f22ac/c9ra02526j-f8.jpg
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