碱性蛋白酶含量对天然橡胶结构和性能的影响

IF 3.1 4区工程技术 Q2 POLYMER SCIENCE

Polymers for Advanced Technologies Pub Date : 2024-08-12 DOI:10.1002/pat.6549

Qinglong Qu, Xianning Wang, Shuo Liu, Jiyuan Cui, Zhenxiang Xin, Hongzhen Wang, Shuqiang Ding

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引用次数: 0

摘要

天然橡胶的凝固技术对天然橡胶的性能有着重要影响。碱性蛋白酶固化技术因其固化效果好、硫化性能优异、污染小等优点受到国内外研究人员的高度重视。本研究考察了碱性蛋白酶固化技术和酶用量对天然橡胶结构和性能的影响，并与甲酸固化技术进行了比较。固态核磁共振结果表明，增加酶用量会增加生橡胶中的分子链缠结。凝胶含量测试结果表明，添加碱性蛋白酶后，天然网络结构（即凝胶）有所增加。硫化特性测试结果表明，碱性蛋白酶的加入大大缩短了正硫化时间。在酶用量为 0.07% 时，Mw 最大。机械性能测试结果表明，酶用量为 0.07% 时，机械性能最好。此外，随着碱性蛋白酶用量的增加，天然橡胶的阿克隆磨耗量减少，当酶用量为 0.07% 时，阿克隆磨耗量最小。

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Effect of alkaline protease content on the structure and properties of natural rubber

The solidification technology of natural rubber exerts a significant impact on the properties of natural rubber. The solidification technology of alkaline protease has been highly valued by researchers at home and abroad because of its good solidification effect, excellent vulcanization performance, and low pollution. In this study, the effects of alkaline protease solidification technology and enzyme dosage on the structure and properties of natural rubber were investigated and compared with those of formic acid solidification technology. The solid‐state NMR results showed that increasing the enzyme dosage increased the molecular chain entanglements in the raw rubber. The gel content test results showed that the natural network structures (i.e. gels) increased after the addition of alkaline protease. The test results of the vulcanization characteristics showed that the addition of alkaline protease significantly shortened the positive vulcanization time. The Mw was the largest at an enzyme dosage of 0.07%. The test results for mechanical properties showed that the mechanical properties were best when the enzyme dosage was 0.07%. In addition, as the alkaline protease dosage increased, the Akron abrasion volume of natural rubber decreased, and the Akron abrasion volume was the lowest at an enzyme dosage of 0.07%.

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来源期刊

Polymers for Advanced Technologies 工程技术-高分子科学

CiteScore

6.20

自引率

5.90%

发文量

337

审稿时长

2.1 months

期刊介绍： Polymers for Advanced Technologies is published in response to recent significant changes in the patterns of materials research and development. Worldwide attention has been focused on the critical importance of materials in the creation of new devices and systems. It is now recognized that materials are often the limiting factor in bringing a new technical concept to fruition and that polymers are often the materials of choice in these demanding applications. A significant portion of the polymer research ongoing in the world is directly or indirectly related to the solution of complex, interdisciplinary problems whose successful resolution is necessary for achievement of broad system objectives. Polymers for Advanced Technologies is focused to the interest of scientists and engineers from academia and industry who are participating in these new areas of polymer research and development. It is the intent of this journal to impact the polymer related advanced technologies to meet the challenge of the twenty-first century. Polymers for Advanced Technologies aims at encouraging innovation, invention, imagination and creativity by providing a broad interdisciplinary platform for the presentation of new research and development concepts, theories and results which reflect the changing image and pace of modern polymer science and technology. Polymers for Advanced Technologies aims at becoming the central organ of the new multi-disciplinary polymer oriented materials science of the highest scientific standards. It will publish original research papers on finished studies; communications limited to five typewritten pages plus three illustrations, containing experimental details; review articles of up to 40 pages; letters to the editor and book reviews. Review articles will normally be published by invitation. The Editor-in-Chief welcomes suggestions for reviews.