Polymer crystallization regulation in liquid phase enables wearable full-featured thermoplastic-based smart Janus film

Abstract

Smart films, with reversible respone to external stimuli, are the key components of smart devices such as sensors, actuators and intelligent robotics. Among them, thermoplastics-based smart Janus films are particularly striking due to their asymmetric responsiveness and multifunctionality. However, the traditional preparation methods of Janus films such as electrospinning, filtration, or pasting are usually limited bue to their high requiremenets on instruments, operating procedures, and poor bonding forces. Here, we develop a one-step method of solvent and antisolvent crystallization to construct full-featured thermoplastics-based smart Janus films with excellent binding performance. Large-scale and low-cost arbitrary intelligent thermoplastics can be endowed by combining the optical and electrical properties of two-dimensional nanomaterials with the plasticity of thermoplastics. Here we demonstrate several proof-of-concept examples of typical smart properties including plasticity, self-healing, reprocessibility, smart actuation and recyclability, which provides a new direction for wearable devices.