Tunable Surfaces and Films from Thioester Containing Microparticles,ACS Applied Materials & Interfaces

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Tunable Surfaces and Films from Thioester Containing Microparticles
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-06-06 , DOI: 10.1021/acsami.2c05113
Alina M. Martinez ₁ , Lewis M. Cox ₂ , Amir Darabi ₂ , Nicholas J. Bongiardina ₁ , Christopher N. Bowman _{1,

3}

Affiliation

Reported here, thioester containing microparticles were designed with 40% excess thiol to enable thiol–thioester exchange to facilitate the formation of cohesive films from the particles. A thiol-Michael dispersion polymerization was used to generate thioester containing microparticles with a diameter of 4.0 ± 0.4 μm. The particles were then swollen with a base at varying concentrations to activate the thiol–thioester exchange and subsequently compressed between two glass slides. Resultant films were characterized over time with profilometry and atomic force microscopy (AFM) to infer particle coalescence at different catalyst loadings and times. Tensile tests were performed confirming the structural integrity of the particle-based films. Furthermore, microparticles were welded to a nondynamic network demonstrating feasibility in potential applications to generate materials containing differing mechanical properties. Being able to control the functionality of particles, and thus mechanical properties of the resultant films, is also important for applications in coatings, adhesives, and 3D printing where spatial patterning or selective material property control is needed.

中文翻译：

含硫酯微粒的可调谐表面和薄膜

据报道，含硫酯的微粒被设计成具有 40% 过量的硫醇，以使硫醇-硫酯交换能够促进从颗粒中形成粘性膜。硫醇-迈克尔分散聚合用于生成直径为 4.0 ± 0.4 μm 的含硫酯微粒。然后将颗粒用不同浓度的碱溶胀以激活硫醇-硫酯交换，随后在两个载玻片之间压缩。随着时间的推移，用轮廓测定法和原子力显微镜 (AFM) 对所得薄膜进行表征，以推断不同催化剂负载和时间下的颗粒聚结。进行拉伸测试以确认基于颗粒的薄膜的结构完整性。此外，微粒被焊接到非动态网络上，证明了在潜在应用中产生具有不同机械性能的材料的可行性。能够控制颗粒的功能，从而控制所得薄膜的机械性能，对于需要空间图案化或选择性材料性能控制的涂料、粘合剂和 3D 打印应用也很重要。

更新日期：2022-06-06

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