Lignin-Cellulose Nanocrystals from Hemp Hurd as Light-Coloured Ultraviolet (UV) Functional Filler for Enhanced Performance of Polyvinyl Alcohol Nanocomposite Films

被引：23

作者：

Zhang, Yi ^{[1
]}

Haque, Abu Naser Md Ahsanul ^{[1
]}

Naebe, Maryam ^{[1
]}

机构：

[1] Deakin Univ, Inst Frontier Mat, 75 Pigdons Rd, Geelong, Vic 3216, Australia

来源：

NANOMATERIALS | 2021年 / 11卷 / 12期

关键词：

light-coloured lignin; cellulose nanocrystals; UV-shielding materials; packaging; sustainability; PRETREATMENT; CRYSTALLINITY; NANOCELLULOSE; NANOFIBRILS; BLOCKING; POLYMER; BARRIER; ETHANOL; RATIO; ACID;

D O I：

10.3390/nano11123425

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Lignin is a natural light-coloured ultraviolet (UV) absorber; however, conventional extraction processes usually darken its colour and could be detrimental to its UV-shielding ability. In this study, a sustainable way of fabricating lignin-cellulose nanocrystals (L-CNCs) from hemp hurd is proposed. A homogeneous morphology of the hemp particles was achieved by ball milling, and L-CNCs with high aspect ratio were obtained through mild acid hydrolysis on the ball-milled particles. The L-CNCs were used as filler in polyvinyl alcohol (PVA) film, which produced a light-coloured nanocomposite film with high UV-shielding ability and enhanced tensile properties: the absorption of UV at wavelength of 400 nm and transparency in the visible-light region at wavelength of 550 nm was 116 times and 70% higher than that of pure PVA, respectively. In addition to these advantages, the nanocomposite film showed a water vapour transmission property comparable with commercial food package film, indicating potential applications.

引用

页数：21

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