Effect of triple modification on structure and properties of sesbania gum

IF 3.1 3区化学 Q2 POLYMER SCIENCE

Polymer Bulletin Pub Date : 2024-09-30 DOI:10.1007/s00289-024-05513-5

Hongbo Tang, Wen Zhang, Yanping Li, Xiaojun Liu

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Abstract

Sesbania gum (SG), as a natural polymer, was modified by combining acidolysis, hydroxypropylation and esterification of chlorosulfonic acid to well adjust its properties. The acidolysis and esterification lowered the swelling capacity of SG; while, the hydroxypropylation increased the swelling capacity of SG. The peak intensity of CH₂ groups was evidently influenced by the esterification, but was hardly affected by the acidolysis and hydroxypropylation. SG was a strip-shaped semi-crystalline polymer. The acidolysis and esterification were mainly accomplished on large particles. The effect of acidolysis and esterification on the key thermodynamic parameters was contrary to that of hydroxypropylation. The hydroxypropylation decreased the thermal stability of SG; while, the acidolysis and esterification raised its thermal stability. The onset decomposition temperature and melting enthalpy were distinctly reduced by the esterification. The removal rate of Zn²⁺ by sulfonated hydroxypropyl acidolysis sesbania gum (SHASG) could reach 75.5%.

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三重改性对芝麻胶结构和特性的影响

芝麻胶（SG）是一种天然聚合物，通过结合氯磺酸的酸解、羟丙基化和酯化对其进行改性，可以很好地调整其特性。酸解和酯化降低了 SG 的溶胀能力，而羟丙基化则提高了 SG 的溶胀能力。CH2基团的峰值强度明显受到酯化作用的影响，但几乎不受酸解作用和羟丙基化作用的影响。SG 是一种条状半结晶聚合物。酸解和酯化主要在大颗粒上完成。酸解和酯化对关键热力学参数的影响与羟丙基化相反。羟丙基化降低了 SG 的热稳定性，而酸解和酯化则提高了其热稳定性。酯化作用明显降低了起始分解温度和熔化焓。磺化羟丙基酸解芝麻胶（SHASG）对 Zn2+ 的去除率可达 75.5%。

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来源期刊

Polymer Bulletin 化学-高分子科学

CiteScore

6.00

自引率

6.20%

发文量

审稿时长

5.5 months

期刊介绍： "Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad. "Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."