研究目的
To prepare a NIR light-induced shape memory composite with light-induced plasticity by incorporating graphene oxide (GO) into cross-linked poly (vinyl butyral) (PVB), aiming to achieve excellent shape memory properties and solid-state plasticity.
研究成果
The PVB/GO composites exhibited excellent NIR light-induced shape memory performance and solid-state plasticity, with the ability to be repeatedly programmed to a new permanent shape via a light-induced plasticity process. The composites showed high shape recovery ratio even after multiple cycles of reconfiguration, demonstrating their potential for applications in self-deployment devices and soft robotics.
研究不足
The high temperature required for solid-state plasticity in some works brings difficulties in accurately reconfiguring the designed new permanent shape of the materials and makes it unsuitable for heat-sensitive applications. The shape of the entire material changes simultaneously during the heat-induced plasticity process due to the lack of selectivity.
1：Experimental Design and Method Selection:
The study involved the preparation of PVB/GO composites through a cross-linked reaction between PVB and aromatic diisocyanate, incorporating GO as a photothermal agent.
2：Sample Selection and Data Sources:
PVB and GO were selected as the main materials, with the composites named as PMxGDy based on their composition.
3：List of Experimental Equipment and Materials:
Equipment included FEI tecnai F30 transmission electron microscopy (TEM), scanning electron microscope (SEM), Fourier transformed IR spectroscopy (FT-IR), universal testing machine, dynamic mechanical analysis (DMA), and thermal imaging camera. Materials included PVB, GO, MDI, DMF, DBTDL.
4：Experimental Procedures and Operational Workflow:
The composites were prepared by dissolving PVB in GO dispersion, adding MDI and DBTDL, casting the solution onto a Teflon plate, and drying. The shape memory and plasticity properties were tested using DMA and bending-recovery tests under NIR light.
5：Data Analysis Methods:
The shape memory properties were evaluated by shape fixity ratio (Rf) and shape recovery ratio (Rr), while the plasticity was assessed by shape reconfigured ratio (Rs).
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