Effect of Graphite Nanosheets on Properties of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)

被引：12
作者：
Montagna, Larissa Stieven [1 ]
do Amaral Montanheiro, Thais Larissa [1 ]
Barros Machado, Joao Paulo [2 ]
Passador, Fabio Roberto [1 ]
Lemes, Ana Paula [1 ]
Rezende, Mirabel Cerqueira [1 ]
机构：
[1] Fed Univ Sao Paulo UNIFESP, Grp Polymers & Macromol, Inst Sci & Technol, Sao Jose Dos Campos, SP, Brazil
[2] Natl Inst Space Res INPE, Associated Lab Sensors & Mat LAS, Sao Jose Dos Campos, SP, Brazil
来源：
INTERNATIONAL JOURNAL OF POLYMER SCIENCE | 2017年 / 2017卷
基金：
巴西圣保罗研究基金会;
关键词：
BARRIER PROPERTIES; GRAPHENE OXIDE; NANOCOMPOSITES; MORPHOLOGY; RAMAN; FUNCTIONALIZATION; BEHAVIOR;
D O I：
10.1155/2017/9316761
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The influence of different contents, 0.25, 0.50, and 1.00 wt%, of graphite nanosheets (GNS) on the properties of poly(3-hydroxybutyrate- co-3-hydroxyvalerate) (PHBV) nanocomposites obtained by solution casting method has been studied. GNS were prepared by three steps: intercalation (chemical exfoliation), expansion (thermal treatment), and the GNS obtainment (physical treatment by ultrasonic exfoliation). X-ray diffraction (XRD), Raman spectroscopy, and field emission gun-scanning electron microscopy (FE-SEM) showed that the physical, chemical, and thermal treatments preserved the graphite sheets structure. XRD and Raman results also showed that GNS were dispersed in the PHBV matrix. The degree of crystallinity (Xc) of the nanocomposites did not change when the graphite nanosheets were added. However, the GNS acted as nucleation agent for crystallization; that is, in the second heating the samples containing GNS showed two melting peaks. The addition the GNS did not change the thermal stability of the PHBV.
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页数：9
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