<br>磺化木质素-淀粉聚合物的生成及其作为絮凝剂的用途,Biomacromolecules

当前位置： X-MOL 学术 › Biomacromolecules › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

磺化木质素-淀粉聚合物的生成及其作为絮凝剂的用途
Biomacromolecules ( IF 5.5 ) Pub Date : 2023-02-21 , DOI: 10.1021/acs.biomac.2c01437
Jonathan A Diaz-Baca ₁ , Ayyoub Salaghi ₁ , Pedram Fatehi ₁

Affiliation

本文报道了妥尔油木质素 (TOL)、淀粉和 2-甲基-2-丙烯-1-磺酸钠盐 (MPSA)（一种含磺酸盐的单体）在三组分体系中的聚合反应，以生成絮凝剂胶体系统。利用先进的¹ H、COSY、HSQC、HSQC-TOCSY 和 HMBC NMR 技术，证实 TOL 的酚基结构和淀粉的脱水葡萄糖单元通过单体共价聚合生成三嵌段共聚物。共聚物的分子量、回转半径和形状因子与木质素和淀粉的结构以及聚合结果基本上相关。通过石英晶体微天平耗散（QCM-D）分析研究了共聚物的沉积行为，表明具有较大分子量的共聚物（ALS-5）比具有较小分子量的共聚物沉积更多并生成更致密的吸附层固体表面上的重量。由于其较高的电荷密度、分子量和延伸的线圈状结构，无论搅拌和重力的程度如何，ALS-5 都能在胶体系统中产生更大的絮凝物和更快的沉降速度。这项工作的结果提供了一种制备木质素-淀粉聚合物的新方法，即在胶体体系中具有优异絮凝性能的可持续生物大分子。

"点击查看英文标题和摘要"

Generation of Sulfonated Lignin-Starch Polymer and Its Use As a Flocculant

This paper reports the polymerization of tall oil lignin (TOL), starch, and 2-methyl-2-propene-1-sulfonic acid sodium salt (MPSA), a sulfonate-containing monomer, in a three-component system to generate flocculants for colloidal systems. By utilizing the advanced ¹H, COSY, HSQC, HSQC-TOCSY, and HMBC NMR techniques, it was confirmed that the phenolic substructures of TOL and the anhydroglucose unit of starch were covalently polymerized by the monomer to generate the three-block copolymer. The molecular weight, radius of gyration, and shape factor of the copolymers were fundamentally correlated to the structure of lignin and starch, as well as the polymerization outcomes. The deposition behavior of the copolymer, studied by a quartz crystal microbalance with dissipation (QCM-D) analysis, revealed that the copolymer with a larger molecular weight (ALS-5) deposited more and generated more compact adlayer than the copolymer with a smaller molecular weight on a solid surface. Owing to its higher charge density, molecular weight, and extended coil-like structure, ALS-5 produced larger flocs with faster sedimentation in the colloidal systems, regardless of the extent of agitation and gravitational force. The results of this work provide a new approach to preparing a lignin-starch polymer, i.e., a sustainable biomacromolecule with excellent flocculation performance in colloidal systems.

更新日期：2023-02-21

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南