Highly transparent PVA/nanolignin composite films with excellent UV shielding, antibacterial and antioxidant performance

2021 ◽  
Vol 162 ◽  
pp. 104873
Author(s):  
Weijun Yang ◽  
Hui Ding ◽  
Guochuang Qi ◽  
Chengcheng Li ◽  
Pengwu Xu ◽  
...  
Keyword(s):  
Composite Films ◽  
Uv Shielding

Facile design of tough, strong, and UV-shielding soy protein-based composite films

2021 ◽  
Vol 166 ◽  
pp. 113474
Author(s):  
Jiongjiong Li ◽  
Xiaona Li ◽  
Fudong Zhang ◽  
Wei Zhang ◽  
Jianzhang Li
Keyword(s):  
Soy Protein ◽  
Composite Films ◽  
Uv Shielding

scholarly journals Transparent Cellulose/Technical Lignin Composite Films for Advanced Packaging

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1455 ◽  
Author(s):  
Guo ◽  
Tian ◽  
Shen ◽  
Yang ◽  
Long ◽  
...  
Keyword(s):  
Composite Films ◽  
Deep Eutectic Solvent ◽  
Value Added ◽  
Phenolic Hydroxyl ◽  
Total Phenolic ◽  
Hydroxyl Groups ◽  
Uv Shielding ◽  
Technical Lignin ◽  
Phenolic Hydroxyl Groups ◽  
Technical Lignins

Although recent work has shown natural lignin products are promising to fabricate various polymer based functional composites, high-value applications were challenged by their structural complexity and inhomogeneity. This work specially assessed the potential of four technical lignins for cellulose based functional films production. These four technical lignins were obtained by emerging pretreatment systems, i.e., lactic acid-betaine deep eutectic solvent (DES), ethanol organosolv, soda/anthraquinone (Soda/AQ) and the sodium salicylate hydrotrope, and their phenolic substructures were comparatively identified by prevalent 31P NMR technique. The influence of lignin chemical structure on the antioxidant potential and UV-shielding performance of the prepared cellulose/technical lignin composite films were assessed. Results showed severe organosolv and soda/AQ pretreatment produced technical lignins with higher total phenolic hydroxyl groups (3.37 and 3.23 mmol g-1 respectively), which also exhibited higher antioxidant activities. The composite films could effectively block the ultraviolet lights especially for UVB region (ultraviolet B, 280–315 nm) at only 5 wt.% lignin content. The contribution of lignin phenolic substructures to both antioxidant activity and UV-shielding property from high to low was syringyl > guaiacyl > p-hydroxyphenyl phenolic hydroxyl groups. This work provided some useful information that could facilitate upstream lignin extraction or downstream value-added applications.

Graphene oxide/cellulose composite films with enhanced UV-shielding and mechanical properties prepared in NaOH/urea aqueous solution

RSC Advances ◽  
2016 ◽  
Vol 6 (77) ◽  
pp. 73358-73364 ◽  
Author(s):  
Xiaoting Liu ◽  
Tongping Zhang ◽  
Kai Pang ◽  
Yongxin Duan ◽  
Jianming Zhang
Keyword(s):  
Mechanical Properties ◽  
Aqueous Solution ◽  
Graphene Oxide ◽  
Composite Films ◽  
Microstructure Formation ◽  
Uv Shielding ◽  
Sampling Process ◽  
Urea Aqueous Solution ◽  
Ultraviolet Shielding ◽  
Cellulose Composite

The scheme demonstrates the sampling process and microstructure formation of GO/cellulose composite films, which have excellent ultraviolet-shielding and mechanical properties with optimal GO loading.

scholarly journals Transparent Ultraviolet (UV)-Shielding Films Made from Waste Hemp Hurd and Polyvinyl Alcohol (PVA)

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1190 ◽  
Author(s):  
Yi Zhang ◽  
Rechana Remadevi ◽  
Juan P. Hinestroza ◽  
Xungai Wang ◽  
Maryam Naebe
Keyword(s):  
Polyvinyl Alcohol ◽  
Composite Films ◽  
Water Vapor Permeability ◽  
Polymeric Materials ◽  
Vapor Permeability ◽  
New Approach ◽  
Chemical Treatments ◽  
Uv Shielding ◽  
Shielding Properties ◽  
Hemp Hurd

This work proposes a new approach to fabricate highly transparent and flexible composite films that exhibit enhanced UV-shielding properties. Lignin has innate UV-shielding properties. However, when purified lignin, which is conventionally extracted through chemical treatment, is mixed with polymeric materials, its presence negatively influences the transparency of the resulting composite. High transparency and UV-shielding are desirable properties for many applications. In this study, composites were made by mixing lignocellulose particles and polyvinyl alcohol (PVA), where lignocellulose particles were obtained from ball-milled waste hemp hurd without chemical treatments. The UV-shielding properties of the resulting composite film, as a function of hemp/PVA weight ratios, were investigated. The intermolecular interactions between the hemp particles and the PVA were characterized using infrared spectroscopy with the presence of –C=O group at 1655 cm−1, providing evidence that the chemical structure of lignin was preserved. The fabricated hemp/PVA films exhibit stronger UV-shielding, in the UVA-I range (340–400 nm) than TiO2/PVA films. The composite films also showed comparable water vapor permeability (WVP) with commercial packaging plastic film made of HDPE (high-density polyethylene). The optimization experiments were reported, with aim at understanding the balance between the UV-shielding and mechanical properties of the hemp/PVA films. The findings of this work can be applicable to the packaging, food and cosmetic industries where UV shielding is of utmost importance, hence adding value to hemp hurd waste.

TiO2-containing PVA/xylan composite films with enhanced mechanical properties, high hydrophobicity and UV shielding performance

Cellulose ◽  
2014 ◽  
Vol 22 (1) ◽  
pp. 593-602 ◽  
Author(s):  
Junli Ren ◽  
Shuaiyang Wang ◽  
Cundian Gao ◽  
Xiaofeng Chen ◽  
Weiying Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Films ◽  
Uv Shielding

The Nanostructure and Properties of the Nano TiO2/PVA Composite Film

2013 ◽  
Vol 320 ◽  
pp. 611-614
Author(s):  
Wei Hong ◽  
Qing Shan Li ◽  
Jing Sun ◽  
Xin Chun Wang ◽  
Guo Wei Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Optical Properties ◽  
Infrared Spectroscopy ◽  
Polyvinyl Alcohol ◽  
Composite Film ◽  
Composite Films ◽  
Solution Casting ◽  
Uv Shielding

In order to improve the performance of polyvinyl alcohol (PVA), the nanometer TiO2/PVA composite film prepared by solution casting, effects of nanotitanium dioxide (TiO2) PVA film. The structures, mechanical properties, and optical properties of the composite films were detected by infrared spectroscopy, TG, DSC, XRD. The results show that: nanoTiO2 fill added to the PVA matrix to improve the mechanical properties of PVA, thermal stability and UV shielding performance.

Ultrahigh Energy Storage Performances of Polymer-based Nanocomposite via Interfaces Engneering

2020 ◽  
Author(s):  
Peng Wang ◽  
Zhongbin Pan ◽  
Weilin Wang ◽  
Jianxu Hu ◽  
Jinjun Liu ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Energy Storage ◽  
High Performance ◽  
Breakdown Strength ◽  
Composite Films ◽  
Power Electronic ◽  
Ultrahigh Energy

High-performance electrostatic capacitors are in urgent demand owing to the rapidly development of advanced power electronic applications. However, polymer-based composite films with both high breakdown strength (Eb) and dielectric constant...

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