Effect of Microfibrillated Cellulose Loading on Physical Properties of Starch/Polyvinyl Alcohol Composite Films
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2020年第4期
论文作者：田雨 ZHU Puxin 周密 LIN Yi CHENG Fei
文章页码：825 - 831
摘 要：The starch/polyvinyl alcohol （PVA）/ microfibrillated cellulose （MFC） composite films were prepared using solution casting method after adding MFC into starch/PVA blend matrix.The effects of MFC content on the mechanical properties of starch/PVA composite films were investigated.As MFC content increases,the elongation at break and tensile strength increase firstly and then decrease.When the content of MFC is 2wt%,the tensile strength is 26.6 MPa and reaches the maximum.Through Fourier transform infrared （FTIR）,scanning electron microscopy （SEM）,X-ray diffraction （XRD） and thermogravimetric analysis （TGA）,good dispersion of MFC in starch/PVA matrix at the loading of 2wt%,lower crystallinity of the starch/PVA/MFC films in comparison with starch/PVA blend and the effect of glass transition temperature increasing with MFC content from 0.5wt% to 4wt% can be found observed.And,incorporating MFC does not change the composition and crystal structure of the starch/PVA composite films.Thus,the reinforcing mechanism for the improvement of mechanical properties is attributed to the homogeneous dispersion of MFC with large aspect ratio,good compatibility and interfacial interactions between starch/PVA blend matrix and MFC.
田雨，ZHU Puxin，周密，LIN Yi，CHENG Fei
College of Biomass Science and Engineering, Sichuan University
摘 要：The starch/polyvinyl alcohol （PVA）/ microfibrillated cellulose （MFC） composite films were prepared using solution casting method after adding MFC into starch/PVA blend matrix.The effects of MFC content on the mechanical properties of starch/PVA composite films were investigated.As MFC content increases,the elongation at break and tensile strength increase firstly and then decrease.When the content of MFC is 2wt%,the tensile strength is 26.6 MPa and reaches the maximum.Through Fourier transform infrared （FTIR）,scanning electron microscopy （SEM）,X-ray diffraction （XRD） and thermogravimetric analysis （TGA）,good dispersion of MFC in starch/PVA matrix at the loading of 2wt%,lower crystallinity of the starch/PVA/MFC films in comparison with starch/PVA blend and the effect of glass transition temperature increasing with MFC content from 0.5wt% to 4wt% can be found observed.And,incorporating MFC does not change the composition and crystal structure of the starch/PVA composite films.Thus,the reinforcing mechanism for the improvement of mechanical properties is attributed to the homogeneous dispersion of MFC with large aspect ratio,good compatibility and interfacial interactions between starch/PVA blend matrix and MFC.
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