scholarly journals Physical and chemical modifications of cellulose fibers for food packaging applications

Cellulose ◽  
2021 ◽  
Author(s):  
Shahab Saedi ◽  
Coralia V. Garcia ◽  
Jun Tae Kim ◽  
Gye Hwa Shin
Keyword(s):  
Food Packaging ◽  
Cellulose Fibers ◽  
Chemical Modifications ◽  
Physical And Chemical

scholarly journals Physical and chemical modifications of cellulose fibers for food packaging applications

2021 ◽  
Author(s):  
Shahab Saedi ◽  
Coralia V. Garcia ◽  
Jun Tae Kim ◽  
Gye Hwa Shin
Keyword(s):  
Food Packaging ◽  
Low Cost ◽  
Composite Films ◽  
Periodate Oxidation ◽  
Barrier Properties ◽  
Cellulose Fibers ◽  
Free Standing ◽  
Comparative Results ◽  
Cellulose Nanomaterials ◽  
Physical And Chemical

Abstract Cellulose fibers have gained considerable interest for use as gas barrier and reinforcing fillers in food packaging materials because of their interesting properties including biodegradability, low density, nontoxicity, and low cost. Although the modification of cellulose nanomaterials for reinforcing applications has been reviewed in the literature, they suffer from a lack of comparative results, and the modifications related to food packaging applications have not been covered yet. This study reviews physical and chemical methods used to improve oxygen and water barrier properties, water uptake, mechanical strength, and transparency of different food packaging films of cellulose nanomaterials and provides comparative results. Heat treatment, esterification, and tempo-mediated and periodate oxidation are the most common methods for the improvement of the barrier properties of free-standing, bilayer, and composite films prepared from cellulose nanomaterials. Modification using silane compounds is a well-established method for improving the mechanical properties of cellulose fibers and polymer composite films.

Study of physical and chemical modifications induced by 50MeV Li3+ ion beam in polymers

2014 ◽  
Vol 94 ◽  
pp. 54-57 ◽  
Author(s):  
Paramjit Singh ◽  
Satyendra Kumar ◽  
Rajendra Prasad ◽  
Rajesh Kumar
Keyword(s):  
Ion Beam ◽  
Chemical Modifications ◽  
Physical And Chemical

scholarly journals Improving the Ca(II) adsorption of chitosan via physical and chemical modifications and charactering the structures of the calcified complexes

2021 ◽  
pp. 107192
Author(s):  
Xunfan Wei ◽  
Sicong Chen ◽  
Jingjing Rong ◽  
Zhuoxiao Sui ◽  
Sijia Wang ◽  
...  
Keyword(s):  
Chemical Modifications ◽  
Physical And Chemical

scholarly journals Adhesion and Stability of Nanocellulose Coatings on Flat Polymer Films and Textiles

2020 ◽  
Author(s):  
Raha Saremi ◽  
Nikolay Borodinov ◽  
Amine Mohamed Laradji ◽  
Suraj Sharma ◽  
Igor Luzinov ◽  
...  
Keyword(s):  
Polymer Films ◽  
Food Packaging ◽  
Mechanical Stability ◽  
Polymer Coatings ◽  
High Specific Surface Area ◽  
Force Microscopy ◽  
Polycarboxylic Acids ◽  
Composition And Structure ◽  
Filtration Properties ◽  
Physical And Chemical

Renewable nanocellulose materials received increased attention owing to their small dimensions, high specific surface area, high mechanical characteristics, biocompatibility, and compostability. Nanocellulose coatings are among many interesting applications of these materials to functionalize different by composition and structure surfaces, including plastics, polymer coatings, and textiles with broader applications from food packaging to smart textiles. Variations in porosity and thickness of nanocellulose coatings are used to adjust a load of functional molecules and particles into the coatings, their permeability, and filtration properties. Mechanical stability of nanocellulose coatings in a wet and dry state are critical characteristics for many applications. In this work, nanofibrillated and nanocrystalline cellulose coatings deposited on the surface of polymer films and textiles made of cellulose, polyester, and nylon are studied using atomic force microscopy, ellipsometry, and T-peel adhesion tests. Methods to improve coatings adhesion and stability using physical and chemical cross-linking with added polymers and polycarboxylic acids are analyzed in this study. The paper reports on the effect of the substrate structure and ability of nanocellulose particles to intercalate into the substrate on the coating adhesion.

Natural paper-layered composites with air barrier properties achieved by coating with bacterial cellulose

BioResources ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 9569-9574
Author(s):  
Marta Kaźmierczak ◽  
Tomasz P. Olejnik ◽  
Magdalena Kmiotek
Keyword(s):  
Bacterial Cellulose ◽  
Food Packaging ◽  
Barrier Properties ◽  
Cellulose Fibers ◽  
Packaging Material ◽  
Layered Composites ◽  
Chemical Additives ◽  
Cellulosic Fibers ◽  
Biodegradable Packaging ◽  
Cellulose Pulp

In some respects the safest food packaging material is paper that is completely free of chemical additives, made only from primary cellulosic fibers. There is no information in the literature on giving paper barrier properties using nanocellulose without any additives, especially bacterial cellulose, by applying a coating to a fibrous semi-product. In order to prepare paper-layered composites, paper sheets made of beaten or non-beaten softwood or hardwood cellulose pulp, or their 50/50 (wt./wt.) mix, were used in the experiment. After the application of bacterial cellulose onto the sheets, the paper became completely impermeable to air, which means that fine microbial fibers had filled the voids (pores) between plant cellulose fibers. The results of the experiment could be regarded as a perfect, biodegradable packaging material.

scholarly journals Adhesion and Stability of Nanocellulose Coatings on Flat Polymer Films and Textiles

Molecules ◽  
2020 ◽  
Vol 25 (14) ◽  
pp. 3238
Author(s):  
Raha Saremi ◽  
Nikolay Borodinov ◽  
Amine Mohamed Laradji ◽  
Suraj Sharma ◽  
Igor Luzinov ◽  
...  
Keyword(s):  
Polymer Films ◽  
Food Packaging ◽  
Mechanical Stability ◽  
Polymer Coatings ◽  
High Specific Surface Area ◽  
Force Microscopy ◽  
Polycarboxylic Acids ◽  
Composition And Structure ◽  
Filtration Properties ◽  
Physical And Chemical

Renewable nanocellulose materials received increased attention owing to their small dimensions, high specific surface area, high mechanical characteristics, biocompatibility, and compostability. Nanocellulose coatings are among many interesting applications of these materials to functionalize different by composition and structure surfaces, including plastics, polymer coatings, and textiles with broader applications from food packaging to smart textiles. Variations in porosity and thickness of nanocellulose coatings are used to adjust a load of functional molecules and particles into the coatings, their permeability, and filtration properties. Mechanical stability of nanocellulose coatings in a wet and dry state are critical characteristics for many applications. In this work, nanofibrillated and nanocrystalline cellulose coatings deposited on the surface of polymer films and textiles made of cellulose, polyester, and nylon are studied using atomic force microscopy, ellipsometry, and T-peel adhesion tests. Methods to improve coatings’ adhesion and stability using physical and chemical cross-linking with added polymers and polycarboxylic acids are analyzed in this study. The paper reports on the effect of the substrate structure and ability of nanocellulose particles to intercalate into the substrate on the coating adhesion.

scholarly journals NANOTECHNOLOGIES IN CONSTRUCTION

2021 ◽  
pp. 7-14
Author(s):  
O.S. BALAN
Keyword(s):  
Food Packaging ◽  
Building Materials ◽  
Chemical Properties ◽  
Practical Significance ◽  
Construction Sector ◽  
Long Term Effects ◽  
Daily Lives ◽  
Building Product ◽  
The Many ◽  
Physical And Chemical

Problem statement. Cosmetics, clothing, and even food packaging: nanomaterials have invaded our daily lives. The construction and construction sector is no exception, and is undoubtedly one of the largest users of this technology. It is difficult to know if a building product contains nanomaterials. Indeed, unlike certain products, such as cosmetics, food or biocides (insecticides, detergents), no regulations establish special labeling. However, they are very widespread and are used to improve the properties of most materials: cement, plaster, glass, tiles, insulation metals, paints, etc. The benefits of using nanoparticles in construction are huge, promising extraordinary physical and chemical properties for modified building materials. Among the many different types of nanoparticles, titanium dioxide, carbon nanotubes, silicon dioxide, copper, clay, and aluminum oxide are the most widely used nanoparticles in the construction sector [1]. The purpose of this article is to analyze the use of nanoparticles in the construction industry to illustrate the benefits of using nanoparticles and address the short − and long-term effects of nanoparticles on the environment and human health in the microcosm of industry, so that the results can be generalized. Results. The use of nanotechnologies in construction and their properties are analyzed. Scientific novelty and practical significance. The problem of using nanothenologies in construction is analyzed.

scholarly journals CYCLIC BUTYLENE TEREPHTHALATE AND PROMISING FIELD OF APPLICATION

2017 ◽  
Vol 60 (7) ◽  
pp. 4
Author(s):  
Nikolay A. Chukov ◽  
Muslim A. Mikitaev ◽  
Mukhamed Kh. Ligidov ◽  
Musa T. Bashorov ◽  
Vladimir N. Shogenov ◽  
...  
Keyword(s):  
Carbon Fibers ◽  
Atmospheric Pressure ◽  
Ring Opening ◽  
Glass Fibers ◽  
Ring Opening Polymerization ◽  
Chemical Modifications ◽  
Butylene Terephthalate ◽  
Cyclic Butylene Terephthalate ◽  
Physical And Chemical ◽  
Structure Properties

Due to its unique characteristics, cyclic butylene terephthalate is used in novel developments of chemical industry. This article represents the review of the latest achievements in the field of processing, structure, properties of cyclic butylene terephthalate, its physical and chemical modifications as well as composites and nanocomposites based on it. In recent years, cyclic butylene terephthalate oligomers have drawn the attention of scientists. The oligomers can be acquired through the chemical reaction of cyclo-depolymerization and used as materials for ring-opening polymerization reactions. This method of polymerization has a variety of advantages compared to a standard method of synthesis polyesters. One of the main advantages of this method includes the capability to make polymerization reactions at standard atmospheric pressure, low required temperature, no side effects and obtaining a completely finished product as an outcome. The unique qualities of cyclic butylene terephthalate make it a promising material to be used as matrix for a variety of nano- and microcomposites and super concentrate. This study analyzes some of the examples of applying CBT as a super concentrate for creating materials like carbon nanotubes, laminated silicates, carbon fibers and glass fibers. In the majority of studies, the addition of nano-sized fillers into CBT leads to amplification of mechanical properties. In the cases of usage as fillers for carbon fibers and glass fibers, the possibility of replacing thermosetting resins with CBT is currently being researched. It could possibly lead to increase in manufacturability of carbon fibers and fiberglass and increase its possible area of application. Cyclic butylene terephthalate can also be used as a viscosity modifier for synthetic rubbers. In this case it can be both plasticizer and enhancing agent.For citation:Chukov N.A., Mikitaev M.A., Ligidov M.Kh., Bashorov M.T., Shogenov V.N., Pakhomov S.I. Cyclic butylene terephthalate and promising field of application. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 7. P. 4-13.

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