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Printability, shape‐memory , and mechanical properties of PHB / PCL / CNFs composites
Author(s) -
Yue Chengbin,
Hua Mengqing,
Li Heqian,
Liu Yingtao,
Xu Min,
Song Yongming
Publication year - 2021
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.50510
Subject(s) - polyhydroxybutyrate , materials science , composite material , shape memory polymer , polycaprolactone , rheology , dynamic mechanical analysis , differential scanning calorimetry , nanofiber , deformation (meteorology) , shape memory alloy , polymer , genetics , thermodynamics , physics , bacteria , biology
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.