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Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...

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开发功能化的聚乙烯薄膜,使用聚甲基化) 盐凝工艺,具有改善的防性质.

Jules Audourenc1, Héloïse Baldo1, Maximilien Coronas1

  • 1Institut Européen des Membranes, IEM, CNRS, ENSCM, Université de Montpellier, 34095 Montpellier, France.

Langmuir : the ACS journal of surfaces and colloids
|October 18, 2024
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概括

生物基聚酸 (PLA) 薄膜使用聚氧凝平台进行了水利化. 这种表面修饰显著提高了湿透性,减少了蛋白质和细菌的粘附性,显示了医疗应用的潜力.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物化学 聚合物化学
  • 表面化学 表面化学

背景情况:

  • 生物基聚酸 (PLA) 是一个有前途的材料,但对于先进的应用需要进行表面修改.
  • 聚合物表面的化对于改善生物相容性和减少生物污染至关重要.
  • 开发可扩展的表面功能化平台对于工业可行性至关重要.

研究的目的:

  • 开发一种可扩展的方法,用于化聚酸 (PLA) 薄膜.
  • 通过聚氧凝平台将新型的水友性化合物移植到PLA表面.
  • 评估表面修改对可湿性,生物相容性和防性质的影响.

主要方法:

  • 通过sol-gel凝结,PLA薄膜被涂上聚甲基氧 (PMHS).
  • 含有的性分子 (三乙烯糖醇单甲基和糖) 通过水化进行了共接种.
  • 表面特征包括FTIR,XPS和AFM.
  • 通过测量水接触角 (WCA) 来评估浸透性.
  • 生物相容性和防性质通过蛋白质吸附,细菌粘附和细胞毒性测试来评估.

主要成果:

  • 在PLA薄膜上的均PMHS涂层被证实具有较低的表面粗度 (RMS = 0.29nm).
  • 化显著减少了水接触角度,从80° (原生PLA) 降至38° (TEGMEA移植) 和42° (ACB移植).
  • 功能化的PLA薄膜显示蛋白质吸附和细菌粘附显著减少.
  • 细胞毒性测试证实,表面修饰不会影响PLA固有的生物相容性.

结论:

  • 聚氧凝作为一个有效的平台,用于PLA薄膜的可扩展的表面水利化.
  • 水友化合物的共接种增强了可湿性,并提供了显著的抗物质.
  • 这种表面功能化策略对生物医学应用具有很大的潜力,这些应用需要生物相容和不污染的材料.