Effect of lignin on water vapor barrier, mechanical, and structural properties of agar/lignin composite films

2015 ◽  
Vol 81 ◽  
pp. 267-273 ◽  
Author(s):  
Shiv Shankar ◽  
Jeevan Prasad Reddy ◽  
Jong-Whan Rhim
Keyword(s):  
Water Vapor ◽  
Structural Properties ◽  
Composite Films ◽  
Water Vapor Barrier ◽  
Mechanical And Structural Properties

scholarly journals Sandwich-Structured, Hydrophobic, Nanocellulose-Reinforced Polyvinyl Alcohol as an Alternative Straw Material

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4447
Author(s):  
Chun-Tu Chou ◽  
Shih-Chen Shi ◽  
Chih-Kuang Chen
Keyword(s):  
Heat Treatment ◽  
Contact Angle ◽  
Water Vapor ◽  
Polyvinyl Alcohol ◽  
Composite Films ◽  
Nanocomposite Films ◽  
Poly Lactic Acid ◽  
Initial Contact ◽  
Solution Casting ◽  
Water Vapor Barrier

An environmentally friendly, hydrophobic polyvinyl alcohol (PVA) film was developed as an alternative to commercial straws for mitigating the issue of plastic waste. Nontoxic and biodegradable cellulose nanocrystals (CNCs) and nanofibers (CNFs) were used to prepare PVA nanocomposite films by blade coating and solution casting. Double-sided solution casting of polyethylene-glycol–poly(lactic acid) (PEG–PLA) + neat PLA hydrophobic films was performed, which was followed by heat treatment at different temperatures and durations to hydrophobize the PVA composite films. The hydrophobic characteristics of the prepared composite films and a commercial straw were compared. The PVA nanocomposite films exhibited enhanced water vapor barrier and thermal properties owing to the hydrogen bonds and van der Waals forces between the substrate and the fillers. In the sandwich-structured PVA-based hydrophobic composite films, the crystallinity of PLA was increased by adjusting the temperature and duration of heat treatment, which significantly improved their contact angle and water vapor barrier. Finally, the initial contact angle and contact duration (at the contact angle of 20°) increased by 35% and 40%, respectively, which was a significant increase in the service life of the biodegradable material-based straw.

scholarly journals Impact of Various Essential Oils and Plant Extracts on the Characterization of the Composite Seaweed Hydrocolloid and Gac Pulp (Momordica cochinchinensis) Edible Film

Processes ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 2038
Author(s):  
Thuy Thi Bich Tran ◽  
Boi Ngoc Vu ◽  
Md Saifullah ◽  
Minh Huu Nguyen ◽  
Penta Pristijono ◽  
...  
Keyword(s):  
Essential Oils ◽  
Structural Properties ◽  
Plant Extracts ◽  
Composite Films ◽  
Edible Films ◽  
Casting Technique ◽  
Plant Essential Oils ◽  
Mechanical And Structural Properties ◽  
Momordica Cochinchinensis ◽  
Hue Angle

Edible films and coatings have currently received increasing interest because of their potential in food applications. This study examined the effect of incorporated essential oils and natural plant extracts on the characteristics of the composite seaweed hydrocolloid and gac pulp films. Films were prepared by a casting technique, followed by measurement of physical, optical, barrier, mechanical, and structural properties. The results showed that adding plant oils and extracts significantly affected the physical, optical, mechanical, and structural properties of the composite films. Incorporation of the essential oils resulted in a reduction in moisture content and opacity while increasing values for Hue angle and elongation at break of the composite films. Besides, incorporation of the plant extracts showed increases in thickness, opacity, ΔE, Chroma, and elongation at the break, while there is a decrease in the Hue angle values of the composite films. In conclusion, incorporating plant essential oils and extracts into composite seaweed hydrocolloid and gac pulp films can enhance film properties, which can potentially be applied in food products.

Study on the Preparation and Properties of the PVA/SiO2 Hybrid Coating on BOPP Film via Sol-Gel Process

2011 ◽  
Vol 239-242 ◽  
pp. 1956-1959 ◽  
Author(s):  
Li Jing Zhu ◽  
Jia Jun Wang ◽  
Li Guo ◽  
Jie Shen
Keyword(s):  
Water Vapor ◽  
Sol Gel ◽  
Composite Films ◽  
Hybrid Coating ◽  
Barrier Property ◽  
Oxygen Barrier ◽  
Water Vapor Barrier ◽  
Biaxially Oriented Polypropylene ◽  
Sol Gel Process ◽  
Oxygen Barrier Property

In order to improve the barrier property of the biaxially oriented polypropylene (BOPP) film, the PVA/SiO2organic-inorganic hybrid coating on BOPP film was prepared by the sol–gel method. And the structure and properties of the hybrid composite films were characterized. The results showed that, the oxygen barrier property of the composite films was enhanced with the increase of PVA content, while the water vapor barrier property of the composite films was dropped. As the mass ratio of PVA increased to 80%, the oxygen barrier property of the composite films was 308 times that of the pure BOPP film, however, water vapor barrier character was half of the BOPP film.

Tensile, water vapor barrier and antimicrobial properties of PLA/nanoclay composite films

LWT ◽  
2009 ◽  
Vol 42 (2) ◽  
pp. 612-617 ◽  
Author(s):  
Jong-Whan Rhim ◽  
Seok-In Hong ◽  
Chang-Sik Ha
Keyword(s):  
Water Vapor ◽  
Composite Films ◽  
Antimicrobial Properties ◽  
Water Vapor Barrier

Biomimetic Water Vapor Barrier Composite Films

2012 ◽  
Vol 200 ◽  
pp. 356-359
Author(s):  
Li Han ◽  
Jia Jun Wang ◽  
Jie Shen ◽  
Chang Gao
Keyword(s):  
Water Vapor ◽  
Cell Layer ◽  
Composite Films ◽  
Water Vapor Permeability ◽  
Cross Linking ◽  
Vapor Permeability ◽  
Drying Temperature ◽  
Water Vapor Barrier ◽  
Apple Peel ◽  
New Type

A new type of barrier composite film, imitating the structure of apple peel, was prepared in this study. Paraffins, sodium alginate, stearic acid and carboxymethyl cellulose were used to mimic the wax layer, cuticle, pectin layer and single-cell layer of the apple peel, respectively. Different factors have been considered to determine their effects on the water vapor permeability of the films, such as drying temperature, cross-linking agents and thickness of the membranes. The results showed that composite films showed good barrier property in the condition of drying temperature of 60°C and cross-linking agents concentration of 15 mg/ml. The imitating cutinmembrane layer played an important role on resisting water vapor.

Mechanical, thermal, and water vapor barrier properties of regenerated cellulose/nano-SiO2 composite films

Cellulose ◽  
2018 ◽  
Vol 25 (12) ◽  
pp. 7153-7165 ◽  
Author(s):  
Jeevan Prasad Reddy ◽  
A. Varada Rajulu ◽  
Jong-Whan Rhim ◽  
Jongchul Seo
Keyword(s):  
Water Vapor ◽  
Composite Films ◽  
Barrier Properties ◽  
Regenerated Cellulose ◽  
Water Vapor Barrier ◽  
Nano Sio2
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