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Application of Cellulose Nanofibril Prepared by Fenton Oxidized Method in Polyvinyl Alcohol Composite Films
Received:June 19, 2020  
DOI：10.11980/j.issn.0254-508X.2020.09.001
Key Words:cellulose nanofibril  polyvinyl alcohol  composite films  Fenton oxidation
Fund Project:国家自然科学基金面上项目（编号：31971610）。
Author NameAffiliationPostcode
DUAN Linjuan Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457
Yuncheng Polytechnic College， Yuncheng， Shanxi Province， 044300 		044300
DUAN Yan Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 300457
WANG Zheng Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 300457
HU Heng Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 300457
ZENG Wei College of Chemical Engineering and Materials Science， Tianjin University of Science & Technology， Tianjin，300457 300457
LI Qun Tianjin Key Lab of Pulp & Paper， Tianjin University of Science & Technology， Tianjin， 300457 300457
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Abstract:Fenton cellulose nanofibril （F-CNF） was prepared by using dissolving pulp Fenton oxidation with followed homogenization，and then F-CNF /PVA composite films with the additive amount of F-CNF ranging from 1% to 20% were prepared by solution pouring method. Scanning electron microscopy （SEM）， confocal laser scanning microscope （CLSM）， fourier transform infrared spectroscopy （FT-IR）， universal tensile testing machine， swelling property testing and thermogravimetric analysis were used to characterize the micromorphology， chemical structure， mechanical properties， hydroscopicity and thermal stability of the composites. The results showed that a large number of hydrogen bonds were formed between F-CNF and PVA molecules and the acetal reaction occurred. F-CNF uniformly dispersed in PVA matrix， and the two had good interfacial compatibility. After the addition of F-CNF， the tensile strength and elastic modulus of the composite films were significantly improved， the water absorption of the composite material was reduced， and its thermal stability was improved. When the amount of F-CNF was 15%， the tensile strength and young's modulus of the composite films were 65.27 MPa and 1460.32 MPa， respectively， which were 217.77% and 830.69% higher than those of pure PVA film.
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