4D Printed Shape Memory Polyimide Composite Aerogels with High Recovery Stress for Load Driving.

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Tác giả: Wei Fan, Miaomiao Geng, Tianxi Liu, Tuo Liu, Tiantian Xue, Xu Zhang

Ngôn ngữ: eng

Ký hiệu phân loại: 005.117 Object-oriented programming

Thông tin xuất bản: United States : ACS applied materials & interfaces , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 214198

Shape memory polyimide aerogels with lightweight, high-temperature resistance, and excellent shape memory performance are ideal materials for intelligent structural components of aerospace. However, their low recovery stress has been a significant barrier to their practical use, particularly in driving structural deformations. Herein, we have prepared a 4D printed shape memory polyimide/polyimide nanofiber (PI/PIF) composite aerogel with high recovery stress and excellent shape memory performance for load driving at high temperatures. The PIF enhances ink printability and mechanical properties, allowing for the design of PI/PIF aerogels with double-curve macrostructures by 3D printing technology. During the shape programming process, double-curve macrostructures can absorb elastic strain energy to enhance recovery stress. Consequently, the printed PI/PIF aerogels exhibit a low density (0.09 g cm
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