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Two‐Step 3 D‐Printing Approach toward Sustainable, Repairable, Fluorescent Shape‐Memory Thermosets Derived from Cellulose and Rosin
Author(s) -
Lu Chuanwei,
Wang Chunpeng,
Yu Juan,
Wang Jifu,
Chu Fuxiang
Publication year - 2020
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201902191
Subject(s) - thermosetting polymer , materials science , polymerization , cellulose , stereolithography , rosin , chemical engineering , composite material , polymer chemistry , polymer , resin acid , engineering
Abstract Efficiently converting biomass into multifunctional polymerized materials is a challenge to effect high‐valued utilization of biomass resources. A two‐step 3 D‐printing approach has been developed to fabricate a class of robust, fluorescent shape‐memory thermosets from cellulose and rosin‐based photosensitive 3 D‐printing resin solution. The stereolithography 3 D printing was first performed to form the first crosslinked network by UV‐induced chain‐growth polymerization, which fixed the shape of thermoset. Subsequently, isocyanate was applied to react with hydroxy in the monomer to form the second crosslinked network by thermally induced step‐growth polymerization. The formation of a dual‐cure network, leading to phase separation and increased crosslinking density, could greatly improve the mechanical and thermal properties of 3 D‐printed thermosets and endow them with thermally triggered shape‐memory properties and excellent repairability. The 3 D‐printed thermosets are found to have strong luminescence resulting from aggregation‐induced emission originating from rosin. In addition, these 3 D‐printed thermosets could degrade in the presence of NaOH aqueous solution and in situ achieved a range of flexible conductive hydrogels that have important potential application in the flexible electronic materials and smart photoelectric materials.