Thermal Reduced Graphene Based Poly(ethylene vinyl alcohol) Nanocomposites: Enhanced Mechanical Properties, Gas Barrier, Water Resistance, and Thermal Stability

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• 作者：Jia Yang ; Ling Bai ; Gang Feng ; Xuyu Yang ; Meijiao Lv ; Chang鈥檃n Zhang ; Hao Hu ; Xianbao Wang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：November 27, 2013
• 年：2013
• 卷：52
• 期：47
• 页码：16745-16754
• 全文大小：654K
• 年卷期：v.52,no.47(November 27, 2013)
• ISSN：1520-5045

文摘

An effective strategy was reported to fabricate poly(ethylene vinyl alcohol) (EVOH) nanocomposites with well-dispersed thermally reduced graphene (TRG) sheets in a polymer matrix via a solution-mixing method. TRG was successfully exfoliated into few-layer isolated nanosheets by rapid heating of dry graphene oxide powders under inert gas and high temperature. The resultant TRG/EVOH composites turned out to have a 280% increase in tensile strength (30.5 MPa) and a 400% increase in Young鈥檚 modulus (1111.7 MPa) by adding only 4.0 wt % TRG, compared to those of neat EVOH. Moreover, the permeability coefficient of O₂ for the TRG/EVOH nanocomposite films with only 0.5 wt % TRG loading is significantly decreased to 8.517 脳 10^鈥?5 cm³ cm cm^鈥? s^鈥? Pa^鈥?, which is nearly 1671 times lower than that of neat EVOH films. Therefore, the TRG/EVOH nanocomposites offer excellent potential applications as packaging materials to extend the shelf life of perishable goods and prescription medicines.