Preparation and characterization of poly(glycerol sebacate)/cellulose nanocrystals elastomeric composites

作者：Zhou Ling; He Hui^*; Jiang Can; He Shuai

来源：Journal of Applied Polymer Science, 2015, 132(27): 42196.

DOI：10.1002/app.42196

• biodegradable
• biopolymers and renewable polymers
• composites
• mechanical properties
• polyesters

Poly(glycerol sebacate) (PGS) is one of the new elastomers used for soft tissue engineering, while improving its limited mechanical strength is the biggest challenge. In this work, a novel biodegradable elastomer composite PGS/cellulose nanocrystals (CNCs) was prepared by solution-casting method and the mechanical properties, sol-gel contents, crosslink density, and hydrophilic performance were characterized. The thermal and degradation properties of composites were also investigated. Results show that the addition of CNCs into PGS resulted a significant improvement in tensile strength and modulus, as well as the crosslink density and the hydrophilicity of PGS. When the CNCs loading reached 4 wt %, the tensile strength and modulus of the composite reached 1.5 MPa and 1.9 MPa, respectively, resulting 204% and 158% increase compared to the pure PGS. Prolonging the curing time also improved the strength of both the neat PGS and PGS/CNCs composites according to the association and shift of hydroxy peaks around 3480 cm(-1). DSC results indicate that the addition of CNCs improved both the crystallization capacity and moving capability of PGS molecular chain.

• 出版日期2015-7-15
• 单位华南理工大学