Abstract
We reported a novel approach for epoxy composites by incorporation of hyperbranched polyglycerol (HPG) grafted sisal cellulose fibers (SCF). In this work, we have synthesized SCF wrapped HPG shell (SCF-g-HPG) by a “grafting from” strategy for the strong interfacial interaction between fillers and matrix. It was found that the thermal and mechanical properties of epoxy composites were greatly improved by incorporating SCF-g-HPG. For example, the impact strength, flexural strength, tensile strength, Young’s modulus and toughness of the composites with 3.0 wt% SCF-g-HPG loading were 38.35 KJ/m2, 123.40 MPa, 86.62 MPa, 151.7 MPa, and 417.84 MJ/m3, significantly increased by 119.1 %, 55.2 %, 45.6 %, 43.1 %, and 166.1 % respectively, as compared with neat epoxy. In addition, thermal stability of SCF-g-HPG/epoxy composites also showed an obvious enhancement compared with neat epoxy.
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Acknowledgments
The authors gratefully acknowledge the financial support by National Natural Science Foundation of China (51303034, 51163004, 1463007 and 51573201), the Natural Science Foundation of Guangxi Province, China (2013GXNSFAA019308, 2014GXNSFDA118006 and 2014GXNSFBA118034), Guangxi Universities Scientific Research Project (No. YB2014165), Natural Science Foundation of Ningbo (No.Y40307DB05), Guangxi Small Highland Innovation Team of Talents in Colleges and Universities and Guangxi Funds for Specially-appointed Expert.
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Xiao, X., Lu, S., Pan, L. et al. Enhanced thermal and mechanical properties of epoxy composites by addition of hyperbranched polyglycerol grown on cellulose fibers. J Polym Res 23, 72 (2016). https://doi.org/10.1007/s10965-016-0964-y
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DOI: https://doi.org/10.1007/s10965-016-0964-y