Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 138, Issue 22, Pages -Publisher
WILEY
DOI: 10.1002/app.50510
Keywords
3D printing; cellulose nanofibers; mechanical properties; polyhydroxybutyrate; shape memory properties
Categories
Funding
- Forest and Grass Intellectual Property Rights Transformation and Application [KJZXZH202005]
- National Natural Science Foundation of China [31100425]
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This study utilized cellulose nanofibers as reinforcement in polyhydroxybutyrate/polycaprolactone composites to improve mechanical properties and demonstrated the printability of interconnected porous structures with a gyroid surface. The PHB/PCL (80:20) composites with 1 wt% CNF showed the best comprehensive mechanical and shape-memory properties.
Shape-memory polymers have attracted attention as smart implant materials in recent years because they are lightweight, low-cost, easily processable, and because they undergo large deformation. Here, cellulose nanofibers (CNFs) were used as a reinforcement for polyhydroxybutyrate (PHB)/polycaprolactone (PCL) composites to improve mechanical properties. The composites were investigated by rheological tests, differential scanning calorimetry, dynamic mechanical analysis, mechanical property tests, and shape-memory tests. The printability of PHB/PCL/CNFs composites was demonstrated by using them to print interconnected porous structures with a gyroid surface. The results showed that the PHB/PCL (80:20) composites with 1 wt% CNF displayed the best comprehensive mechanical and shape-memory properties. As a functional verification, a model of the self-opening hand was fabricated by 3D printing, and its deformation and recovery capabilities were evaluated.
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