期刊
CHINESE JOURNAL OF POLYMER SCIENCE
卷 31, 期 4, 页码 670-678出版社
SPRINGER
DOI: 10.1007/s10118-013-1248-1
关键词
PHBV; Graphene nanosheets; Nanocomposites; Solution-casting films
资金
- Ningbo Natural Science Foundation [2010A610193, 2011A610116]
- Program for Ningbo Innovative Research Team [2009B21008]
- Ningbo Key Lab of Polymer Materials [2010A22001]
Biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/graphene nanosheet (GNS) composites were prepared via a solution-casting method at low GNS loadings in this work. Transmission electron microscopy revealed that a fine dispersion of GNSs was achieved in the PHBV matrix. The thermal properties of the nanocomposites were investigated by thermogravimetric analysis, and the results showed that the thermal stability of PHBV was significantly improved with a very low loading of GNSs. Nonisothermal melts crystallization behavior, spherulitic morphology and crystal structure of neat PHBV and the PHBV/GNSs nanocomposites were investigated, and the experimental results indicated that crystallization behavior of PHBV was enhanced by the presence of GNSs due to the heterogeneous nucleation effect; however, the two-dimensional (2D) GNSs might restrict the mobility of the PHBV chains in the process of crystal growing. Dynamic mechanical analysis studies showed that the storage modulus of the PHBV/GNSs nanocomposites was greatly improved.
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