Donghua Univ;
State Key Lab Modificat Chem Fibers & Polymer Mat;
Peoples R China;
Coll Mat Sci & Engn;
2999 North Renmin Rd;
Coll Chem Chem Engn & Biotechnol;
Shanghai 201620;
关键词：
Polycitrate;
Direct ink writing;
Chitin nanocrystal;
3D printing;
Bioelastomer;
期刊名称：
Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides
i s s n：
0144-8617
年卷期：
2021 年
256 卷
页 码：
117549-1-117549-8
页 码：
摘 要：
Citrate-based thermoset bioelastomer has numerous tissue engineering applications. However, its insoluble and unmeltable features restricted processing techniques for fabricating complex scaffolds. Herein, direct ink writing (DIW) was explored for 3D printing of poly(1, 8-octanediol-co-Pluronic F127 citrate) (POFC) bioelastomer scaffolds considering that POFC prepolymer (pre-POFC) was waterborne and could form a stable emulsion. The pre-POFC emulsion couldn't be printed, however, chitin nanocrystal (ChiNC) could be as a rheological modifier to tune the flow behavior of pre-POFC emulsion, and thus DIW printing of POFC scaffolds was successfully realized; moreover, ChiNC was also as a supporting agent to prevent collapse of filaments during thermocuring, and simultaneously as a biobased nanofiller to reinforce scaffolds. The rheological analyses showed the prePOFC/ChiNC inks fulfilled the requirements for DIW printing. The printed scaffolds exhibited low swelling, and good performances in strength and resilence. Furthermore, the entire process was easily performed and eco-friendly.
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