Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 16, Pages 19193-19199Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c22377
Keywords
proteins; bovine serum albumin; stereolithography; 3D printing; shape-memory
Funding
- European funding by the Marie Sklodowska-Curie Individual Fellowships (MSCA-IF-GF) [841879-4D]
- MINECO [MAT2017-83373-R]
- National Science Foundation [1752972]
- Office of the Assistant Secretary of Defense for Health Affairs through the CDMRP [W81XWH2110167]
- European Research Council [ERC-CoG-648071-ProNANO]
- Agencia Estatal de Investigacion, Spain [PID2019-111649RB-I00]
- Maria de Maeztu Units of Excellence Program from the Spanish State Research Agency [MDM-2017-0720]
- Marie Curie Actions (MSCA) [841879] Funding Source: Marie Curie Actions (MSCA)
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The study introduces a method of using a resin based on bovine serum albumin for 3D printing to produce bioplastic objects with shape-memory behavior. By retaining the native conformation of proteins, the stored length of each protein molecule can be observed after mechanical deformation, and the original shape can be restored through heating or immersion.
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.
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