聚乙烯基聚合物的合成和生物降解性 基于酸的聚乙烯基聚合物通过乙烯基点击聚合
Ryota Imamura1, Kota Oto1, Kaho Kataoka1
1Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Sho̅wa-ku, Nagoya 466-8555, Japan.
ACS omega
|July 10, 2023
概括
这项研究从生物质衍生的单体合成了基于酸盐的新型聚-乙烯. 这些可生物降解的聚合物表现出调节性质和受立体化学影响的不同降解率,为可持续材料设计提供了洞察力.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 生物技术是生物技术.
背景情况:
- 可生物降解的聚合物对于可持续的材料开发至关重要.
- 酸是一种生物质衍生的性分子,具有创造新型聚合物结构的潜力.
- 开发具有可控降解特征的聚合物对于环境应用至关重要.
研究的目的:
- 通过使用易于获得的单体合成含酸盐的新型聚-乙烯.
- 研究这些聚合物的生物降解性和立体化学对降解率的影响.
- 探索这些生物质衍生聚合物的潜力,作为可持续材料.
主要方法:
- tartaric 酸与3-butene-1-ol 的化学选择性化,使用三酸催化剂,形成双单体 (BTA).
- 在多中,dialkenyl酸盐和各种dithiols (ED,EBTG,DTT) 之间的thiol-ene多添加反应.
- 使用凝透色谱和差异扫描热量计来对产生的聚合物进行表征.
- 通过使用活性污泥进行生化氧需求 (BOD) 测试来评估生物降解性.
主要成果:
- 合成了三种二甲基酸单体 (l-BTA,d-BTA,meso-BTA).
- 获得了含酸盐的聚乙烯-乙烯,其分子量为 (4.2-9.0) × 10^3,玻璃过渡温度在-25°C至-8°C之间.
- 生物降解性各不相同,其中聚乙烯-BTA-alt-EBTG显示32%,聚乙烯-BTA-alt-ED显示8%的降解.
- 观察到对生物降解有显著的enantio和 diastereoselective效应,由l-BTA,d-BTA和 meso-BTA衍生的聚合物的降解速率不同.
结论:
- 新型可生物降解的聚乙可以从酸衍生物中合成.
- 酸单体的立体化学显著影响聚合物的生物降解率.
- 这些发现为设计立体化学控制的,基于生物质的可生物降解聚合物提供了基础.
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