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Reconfigurable, Solvent-Processable, NIR-Triggerable Shape Memory Cyanate Esters for Smart Molds
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DOI：10.1021/acsami.3c04620.png)
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Shape memory polymer (SMP)-based smart molds, which couldprovidehigh-resolution mold shape and morph in response to external stimulifor readily demolding the complex structure, attract extensive attention.However, the suitable SMP for smart molds is usually confined withlow stretchability that likely causes damage during demolding. Herein,we present a cyanate ester smart composite (CESC) with a reconfigurable,solvent-processable, and near-infrared (NIR)-triggerable shape memoryeffect (SME), which enables the 2D sheet with a variety of morphedcomplex shapes through deformation in a mild situation. Notably, thereconfigurable SME and the recyclability of the shape memory cyanateester (SMCE) were addressed for the first time, attributed to thedynamic covalent bonds of transesterification and the novel cyanurateexchange. In addition, we found that the mechanism of solvent-processableSME is attributed to the varied cross-linking density and the mobilityof the polymer chain. Integrating the multiple responsive SME andreconfigurable SME, the CESC demonstrated versatile applications asa smart mold. The results demonstrate a wide scope of applicationof the integrated SME and provide a new design strategy for thermosetcyanate materials.
Keyword:
shape memory cyanate ester
smart mold
dynamiccovalent bond
solvent-processable
NIR-triggerable
期刊
IF:
8.2
论文数:
6.1W
被引数:
38.7W
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