scholarly journals Bio-based additives as renewable alternatives for polyvinylchloride formulations and application in paper coatings

RSC Advances ◽  
2017 ◽  
Vol 7 (50) ◽  
pp. 31428-31432
Author(s):  
Ellana Beard ◽  
Michelle Ledward ◽  
Natalia Sergeeva
Keyword(s):  
Citric Acid ◽  
Paper Coating ◽  
Paper Coatings

Citric acid derivatives have been synthesised and incorporated into PVC formulations as sustainable alternatives, offering improved properties in paper coating applications.

Citrus-based hydrocolloids: A water retention aid and rheology modifier for paper coatings

TAPPI Journal ◽  
2019 ◽  
Vol 18 (7) ◽  
pp. 443-450
Author(s):  
PREETI TYAGI ◽  
MICHAEL JOYCE ◽  
SACHIN AGATE ◽  
MARTIN HUBBE ◽  
LOKENDRA PAL
Keyword(s):  
Water Retention ◽  
Coating System ◽  
Paper Coating ◽  
Paper Properties ◽  
Citrus Peel ◽  
Paper Coatings ◽  
Functional Value ◽  
Coating Method ◽  
The Impact ◽  
Rheology Modifier

The rheological and dewatering behavior of an aqueous pigmented coating system not only affects the machine runnability but also affects the product quality. The current study describes the use of natural hydrocolloids derived from citrus peel fibers as a rheology modifier in paper coating applications. The results were compared with carboxymethyl cellulose (CMC) in a typical paper coating system. Water retention of the coating formulation was increased by 56% with citrus peel fibers compared to a default coating, and it also was higher than a CMCcontaining coating. The Brookfield viscosity of paper coatings was found to increase with citrus peel fibers. Compared to CMC, different citrus peel fibers containing coating recipes were able to achieve similar or higher water retention values, with no change or a slight increase in viscosity. Coatings were applied on linerboard using the Mayer rod-coating method, and all basic properties of paper were measured to assess the impact of citrus peel fiber on the functional value of the coatings. Paper properties were improved with coated paper containing citrus peel fibers, including brightness, porosity, smoothness, surface bonding strength, and ink absorption.

The effect of paper coatings containing biopolymer binder and different natural pigments on printability

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Emine Arman Kandirmaz ◽  
Arif Ozcan ◽  
Elif Ural
Keyword(s):  
Xanthan Gum ◽  
Packaging Material ◽  
Paper Coating ◽  
Natural Pigments ◽  
Paper Coatings ◽  
Different Types ◽  
Packaging Industry ◽  
Ink Transfer ◽  
Good Coating ◽  
Main Material

Abstract Paper is an environmentally friendly, recyclable material whose main material is cellulose, which can be obtained from all kinds of trees and plants, used as writing, printing and packaging material. Due to its structural properties, papers are not resistant to temperature and humidity, as well as problems with ink transfer with its porous structure and experienced negative printability properties. In recent years, especially the growth of the packaging industry has increased the demand for papers with improved printability properties. In order to obtain better printability properties from papers, some processes can be performed in paper production, as well as some surface treatments after production. These processes are paper coating, sizing and calendering. Paper coatings are generally water-dispersed coating solutions with one or more pigments, binders and certain additives to improve the desired properties. With these processes, by filling the gaps between the pores of the paper, a shapely and smooth surface is obtained and good printability is obtained together with the optical and physical properties of the papers. In this study, the interactions and printability properties of different types of pigments with xanthan gum binder were investigated by preparing paper coating formulations using calcium carbonate, barite and talc pigments and xanthan gum as binder. As a result, xanthan is a good coating binder and CaCO 3 {\mathrm{CaCO}_{3}} from the compared pigments is the most suitable compared to the other 2 pigments, considering all the studied areas.

Antibacterial effect of Ag nanoparticles into the paper coatings

2019 ◽  
Vol 34 (4) ◽  
pp. 507-515 ◽  
Author(s):  
Emine Arman Kandirmaz ◽  
Arif Ozcan
Keyword(s):  
Ag Nanoparticles ◽  
Chemical Structure ◽  
Food Packaging ◽  
Antibacterial Effect ◽  
Antibacterial Properties ◽  
Printing Industry ◽  
Paper Coating ◽  
E Coli ◽  
Paper Coatings ◽  
Infrared Spectrophotometer

Abstract Food packaging is the most important output of the printing industry. Giving antibacterial effect to the papers used in food packaging will extend the shelf life of the product and food transfer in healthier conditions. The nanoparticles with known antibacterial activity are nanosilver, nanogold, nanosilica. Binders used in paper coating provide a good nutrient medium for bacteria. In this study, Ag nanoparticles was first synthesized as monodisperse in 10 nm size with polyvinyl pyrrolidone and sodium boron reaction which will give antibacterial properties to paper coatings. The chemical structure of the synthesized Ag nanoparticles is illuminated by fourier transform infrared spectrophotometer (FTIR). Different paper coating formulations containing varying amounts of Ag nanoparticles were prepared with starch binder. Using these mixtures; papers coated with a laboratory-type paper coating machine onto 80 g/m2 paper. Color, gloss, contact angle, surface energy, antibacterial properties of the paper against the E. coli bacteria and S. aureus bacteria were examined. As a result, Ag nanoparticles has been successfully synthesized and used in paper coating. Antibacterial and printability properties were improved by increasing the amount of Ag nanoparticles.

UV-Laser Plasma Study of Elemental Distributions of Paper Coatings

1995 ◽  
Vol 49 (12) ◽  
pp. 1721-1728 ◽  
Author(s):  
H. J. Häkkänen ◽  
J. E. I. Korppi-Tommola
Keyword(s):  
Laser Pulse ◽  
Laser Plasma ◽  
Atomic Emission ◽  
Multilayer Coatings ◽  
Uv Laser ◽  
Paper Coating ◽  
Paper Coatings ◽  
Line Intensities ◽  
Xecl Excimer Laser

The potential of a laser-generated plasma method in the analysis of coating coverage, coatweight distribution, and 3D distribution of various pigments of paper coating is described. A XeCl-excimer laser (308 nm) was used to generate microscopic plasma from the paper coating, and delayed detection of silicon and calcium atomic emission line intensities was used as a measure of mass vaporized. Macroscopic areas typically 10 × 10 mm2 at a spatial resolution of 250 μm were studied. With a single laser pulse (0.2 mJ of energy), about 2 ng of coating from a volume of 30 μm in diameter and 2 μm in depth was vaporized. The method seems to be useful for characterization of multilayer coatings.

Coadministration of citric acid allows oxytetracycline dose reduction in yellowtail Seriola quinqueradiata infected with Vibrio anguillarum

2020 ◽  
Vol 140 ◽  
pp. 25-29
Author(s):  
K Akiyama ◽  
N Hirazawa ◽  
A Hatanaka
Keyword(s):  
Body Weight ◽  
Citric Acid ◽  
Effective Treatment ◽  
Dose Reduction ◽  
Vibrio Anguillarum ◽  
Enhancing Effect ◽  
Bacterial Diseases ◽  
Seriola Quinqueradiata ◽  
Poor Efficacy

Oxytetracycline (OTC) has been commonly used as an effective antibiotic against various fish bacterial diseases, including vibriosis. In this study, the absorption-enhancing effect of citric acid on oral OTC pharmacokinetics and treatment of artificial Vibrio anguillarum infection was evaluated in juvenile yellowtail Seriola quinqueradiata followed by serum OTC concentration analysis. When 25 mg kg-1 body weight (BW) OTC was administered in combination with 1250 mg kg-1 BW citric acid, the serum OTC concentration reached almost the same concentration as that of the group treated with 50 mg kg-1 BW OTC. This coadministration successfully suppressed mortality due to vibriosis similar to the group treated with 50 mg kg-1 BW OTC. Conversely, poor efficacy was observed when only 25 mg kg-1 BW OTC was administered. These results suggest that coadministration of citric acid can be beneficial in reducing the dose of OTC needed for effective treatment, and thus contributes to the goal of reduced use of this antibiotic in aquaculture.

EFFECT OF SERUM GONADOTROPHIN ON DEHYDROGENASES OF THE CITRIC ACID CYCLE IN THE OVARY OF THE RAT

1963 ◽  
Vol 42 (4) ◽  
pp. 480-484 ◽  
Author(s):  
B. Eckstein ◽  
R. Landsberg
Keyword(s):  
Citric Acid ◽  
Citric Acid Cycle ◽  
Age Groups ◽  
Succinic Dehydrogenase ◽  
Immature Rat ◽  
Acid Cycle ◽  
Immature Rats ◽  
Rat Ovary

ABSTRACT The succinic, malic and isocitric dehydrogenases in the ovary of immature and mature, normal and serum gonadotrophin injected rats were examined. The Qo2 of these enzymes were markedly enhanced in the gonadotrophin injected rats of both age groups, except in the case of succinic dehydrogenase in the ovary of the immature rats, where a slight non-significant decrease was noted. It is concluded that in the mature rat ovary, gonadotrophin administration stimulates the activity of all the examined dehydrogenases of the citric acid cycle, whereas in the immature rat ovary, at least the isocitric- and malic dehydrogenases are thus stimulated.

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