Affiliation:
1. School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules State Key Laboratory for Metal Matrix Composite Materials Shanghai Jiao Tong University Shanghai 200240 China
2. School of Mechanical Engineering State Key Laboratory of Mechanical Systems and Vibration Shanghai Jiao Tong University Shanghai 200240 China
Abstract
AbstractHarnessing the spontaneous surface instability of pliable substances to create intricate, well‐ordered, and on‐demand controlled surface patterns holds great potential for advancing applications in optical, electrical, and biological processes. However, the current limitations stem from challenges in modulating multidirectional stress fields and diverse boundary environments. Herein, this work proposes a universal strategy to achieve arbitrarily controllable wrinkle patterns via the spatiotemporal photochemical boundaries. Utilizing constraints and inductive effects of the photochemical boundaries, the multiple coupling relationship is accomplished among the light fields, stress fields, and morphology of wrinkles in photosensitive polyurethane (PSPU) film. Moreover, employing sequential light‐irradiation with photomask enables the attainment of a diverse array of controllable patterns, ranging from highly ordered 2D patterns to periodic or intricate designs. The fundamental mechanics of underlying buckling and the formation of surface features are comprehensively elucidated through theoretical stimulation and finite element analysis. The results reveal the evolution laws of wrinkles under photochemical boundaries and represent a new effective toolkit for fabricating intricate and captivating patterns in single‐layer films.
Funder
National Natural Science Foundation of China
National Key Research and Development Program of China
Natural Science Foundation of Shanghai Municipality
Double First Class University Plan
State Key Laboratory of Mechanical System and Vibration
Program of Shanghai Academic Research Leader
Science and Technology Innovation Plan Of Shanghai Science and Technology Commission
Cited by
2 articles.
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