3D-Printed Bioplastics with Shape-Memory Behavior Based on Native Bovine Serum Albumin
3D-Printed Bioplastics with Shape-Memory Behavior Based on Native Bovine Serum Albumin
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DOI：
10.1021/acsami.0c22377
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发表时间：
2021-04-19
影响因子：
9.5
通讯作者：
Nelson, Alshakim
中科院分区：
文献类型：
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作者：
Sanchez-Rexach, Eva;Smith, Patrick T.;Nelson, Alshakim
生物基塑料可以取代石油衍生材料，以满足未来塑料材料生命周期中可持续性的需求。虽然有大量的努力来开发基于蛋白质的塑料材料用于商业用途，但它们的应用受到加工性差和机械性能限制的限制。在这里，我们提出了一种基于牛血清白蛋白（BSA）的树脂，用于立体光刻设备（SLA）3D打印，为生物塑料物体提供形状记忆行为。我们证明，这些球状蛋白的天然构象在很大程度上保留在3D打印的构建体中，并且每个蛋白质分子都具有“存储长度”，可以在3D生物塑料物体的机械变形（拉伸或压缩）过程中显示。虽然塑性变形的物体可以无限期地保持这种状态，但加热物体或浸入水中可以使其恢复到原始的3D打印形状。
Bio-based plastics that can supplant petroleum-derived materials are necessary to meet the future demands of sustainability in the life cycle of plastic materials. While there are significant efforts to develop protein-based plastic materials for commercial use, their application is limited by poor processability and limitations in mechanical performance. Here, we present a bovine serum albumin (BSA)-based resin for stereolithographic apparatus (SLA) 3D printing that affords bioplastic objects with shape-memory behavior. We demonstrate that the native conformation of these globular proteins is largely retained in the 3D-printed constructs and that each protein molecule possesses a "stored length" that could be revealed during mechanical deformation (extension or compression) of the 3D bioplastic objects. While the plastically deformed objects could retain this state for an indefinite period of time, heating the object or submerging in water allowed it to return to its original 3D-printed shape.