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Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold

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Ultralight and Ablation-Resistant Shape-Memory Ceramizable Polymer Aerogel for Self-Adaptive Thermal Protection.

Tuo Liu¹, Tiantian Xue¹, Shibai Yang¹

¹Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)

|November 26, 2025

Summary

A novel shape-memory ceramizable polymer aerogel (SMCPA) enables deployable thermal protection systems. This material offers rapid shape recovery for deployment and in-situ ceramization for extreme temperature resistance in deep-space missions.

Keywords:

ceramization deployable thermal protection polyimide aerogels shape memory

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Area of Science:

Materials Science
Aerospace Engineering
Polymer Chemistry

Background:

Deployable thermal protection systems (DTPS) for deep-space exploration demand materials that are lightweight, deformable, and resistant to extreme temperatures.
Existing shape memory polymers (SMPs) lack thermal stability, while shape memory ceramics (SMCs) are not rapidly programmable or efficiently deployable.

Purpose of the Study:

To develop a novel material that integrates structural deployment and thermal protection for DTPS.
To overcome the limitations of current SMPs and SMCs by creating a material with sequential self-adaptive thermo-responsive behavior.

Main Methods:

Development of a shape-memory ceramizable polymer aerogel (SMCPA).
Characterization of SMCPA's thermo-responsive behavior, including shape recovery and in-situ ceramization.
Evaluation of SMCPA's performance under high heat flux conditions, measuring density, shape memory properties, and ablation resistance.

Main Results:

SMCPA exhibits ultralow density (0.12 ± 0.02 g cm⁻³).
Achieved excellent shape memory performance with a shape fixation ratio of 97.0 ± 0.5% and shape recovery ratio of 94.2 ± 0.6%.
Demonstrated remarkable ablation resistance with a mass ablation rate of 0.012 ± 0.003 g s⁻¹ under 1.5 MW m⁻² heat flux.

Conclusions:

SMCPA successfully reconciles the need for lightweight deployable structures with high-temperature thermal protection.
The material's sequential self-adaptive behavior allows for both rapid deployment and formation of an ablation-resistant ceramic layer.
SMCPA presents a promising material solution for next-generation DTPS in deep-space missions.