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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and characterization of poly(glycerol sebacate)/cellulose nanocrystals elastomeric composites
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Preparation and characterization of poly(glycerol sebacate)/cellulose nanocrystals elastomeric composites

机译：聚癸二酸甘油酯/纤维素纳米晶体弹性复合材料的制备与表征

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摘要

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. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42196.
机译：聚癸二酸甘油酯（PGS）是用于软组织工程的新型弹性体之一，而提高其有限的机械强度是最大的挑战。本文采用溶液流延法制备了新型可生物降解的弹性体复合材料PGS /纤维素纳米晶体，并对其力学性能，溶胶-凝胶含量，交联密度和亲水性能进行了表征。还研究了复合材料的热性能和降解性能。结果表明，在PGS中添加CNCs可以显着改善PGS的拉伸强度和模量，以及交联密度和亲水性。当CNC负载达到4 wt％时，复合材料的拉伸强度和模量分别达到1.5 MPa和1.9 MPa，与纯PGS相比增加204％和158％。延长固化时间还可以根据3480 cm（-1）附近羟基峰的缔合和移动来提高纯PGS和PGS / CNCs复合材料的强度。 DSC结果表明，加入CNCs改善了PGS分子链的结晶能力和移动能力。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42196。

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