title: Poly(vinyl alcohol) films reinforced with nanofibrillated cellulose (NFC) isolated from corn husk by high intensity ultrasonication.
abstract: This work was aimed at fabricating and characterizing poly(vinyl alcohol) films that were reinforced by nanofibrillated corn husk celluloses using a combination of chemical pretreatments and ultrasonication. The obtained nanofibrillated celluloses (NFCs) possessed a narrow width ranging from 50 to 250 nm and a high aspect ratio (394). The crystalline type of NFC was cellulose I type. Compared with the original corn husks, the NCF crystallinity and thermal stability increased due to the removal of the hemicelluloses and lignin. PVA films containing different NFC concentrations (0.5%, 1%, 3%, 5%, 7% and 9%, w/w, dry basis) were examined. The 1% PVA/NFC reinforced films exhibited a highly visible light transmittance of 80%, and its tensile strength and the tensile strain at break were increased by 1.47 and 1.80 times compared to that of the pure PVA film, respectively. The NFC with high aspect ratio and high crystallinity is beneficial to the improvement of the mechanical strength and thermal stability.
authors.affiliation: Material Science and Engineering College, Northeast Forestry University, Harbin 150040, PR China.
authors.forename: Shaoliang
authors.initials: S
authors.lastname: Xiao
authors.affiliation: Material Science and Engineering College, Northeast Forestry University, Harbin 150040, PR China.
authors.forename: Runan
authors.initials: R
authors.lastname: Gao
authors.affiliation: Material Science and Engineering College, Northeast Forestry University, Harbin 150040, PR China.
authors.forename: LiKun
authors.initials: L
authors.lastname: Gao
authors.affiliation: Material Science and Engineering College, Northeast Forestry University, Harbin 150040, PR China. Electronic address: jianli@nefu.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
mesh_terms: D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D019220:High-Energy Shock Waves; D057139:Nanofibers / Q000737:chemistry*; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D013010:Sonication; D013718:Tensile Strength; D003313:Zea mays / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D011142:Polyvinyl Alcohol; D002482:Cellulose
keywords: Corn husks; Light transmittance; Nanofibriled cellulose (NFC); PVA; Tensile strength