Tunable Surfaces and Films from Thioester Containing Microparticles
Tunable Surfaces and Films from Thioester Containing Microparticles
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DOI：
10.1021/acsami.2c05113
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发表时间：
2022-06
期刊：
影响因子：
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通讯作者：
A. Martinez;L. Cox;Amir Darabi;Nicholas J. Bongiardina;C. Bowman
中科院分区：
文献类型：
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作者：
A. Martinez;L. Cox;Amir Darabi;Nicholas J. Bongiardina;C. Bowman
本文报道，含有硫酯的微颗粒被设计为含有40%过量硫醇，以使硫-硫酯交换，促进颗粒形成内聚膜。采用巯基-迈克尔分散聚合法制备了直径为4.0±0.4 μm的巯基酯微颗粒。然后用不同浓度的碱对颗粒进行膨胀，以激活硫-硫酯交换，随后在两个载玻片之间进行压缩。随着时间的推移，用轮廓术和原子力显微镜（AFM）对所得膜进行了表征，以推断不同催化剂负载和时间下的颗粒聚结。拉伸试验证实了颗粒基薄膜的结构完整性。此外，微颗粒被焊接到一个非动态网络中，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，从而控制所得到薄膜的机械性能，对于需要空间图案或选择性材料性能控制的涂料，粘合剂和3D打印中的应用也很重要。
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.