Study on manufacturing hot water-resistant PVOH coated paper by gas grafting palmitoyl chloride (I) – Penetration of palmitoyl chloride during gas grafting of PVOH-coated paper
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Kwang-Seob Lee
Abstract
Gas grafting treatment with fatty acid chloride is a hydrophobization method based on the principle of forming ester bonds by reacting hydroxyl groups on the surface of hydrophilic substances with a gaseous fatty acid chloride. In order to increase the hydrophobization efficiency through gas grafting treatment, it is necessary to form an ester bond concentrated on the surface of the polyvinyl alcohol (PVOH) coating layer. When palmitoyl chloride, a fatty acid chloride, reacts with the hydroxyl groups of PVOH to form polyvinyl palmitate, the by-product hydrochloric acid promotes the dehydration of PVOH, causing discoloration while producing polyacetylene. Using this discoloration principle of polyene, it was estimated whether evaporated fatty acid chloride penetrated into the PVOH coating layer. The top layer was coated with PVOH having a saponification degree of 89 %, and the bottom layer was coated with PVOH having a saponification degree of 99 %. There was a difference in the discoloration according to the degree of saponification of PVOH, even the amount of palmitoyl chloride was small as much as 300 mg/m2. It was confirmed that the vaporized fatty acid chloride during gas grafting treatment permeates the PVOH layer of 7 g/m2 even in a very small amount.
Funding source: Ministry of Trade, Industry and Energy
Award Identifier / Grant number: 20013217
Award Identifier / Grant number: 20010431
Funding statement: This work was supported by the Technology Innovation Programs (No. 20013217 and No. 20010431) of Korea Evaluation Institute of Industrial Technology (KEIT) funded by the Ministry of trade, Industry & Energy (MOTIE, Korea).
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Conflict of interest: The authors declare no conflicts of interest.
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Articles in the same Issue
- Frontmatter
- Biorefinery
- Characteristics of potassium hydroxide lignin from corn stalk and dhaincha
- Bark from Nordic tree species – a sustainable source for amphiphilic polymers and surfactants
- Proposal for the conversion of Eucalyptus urograndis into bioethanol via acid hydrolysis, using the concepts of biorefineries
- Chemical pulping
- Dissolving pulp and furfural production from jute stick
- Bleaching
- The impact of bleaching on the yield of softwood kraft pulps obtained by high alkali impregnation
- Paper technology
- To improve the disintegration potential of toilet grade tissue paper
- Paper physics
- Mechanical response of paperboard to rapid compression
- Effect of saturation adsorption of paper strength additives on the performance of paper
- Paper chemistry
- Conservation and enhancement of naturally aged paper using bi-functionalized polyamidoamine (SiPAAOH)
- Study on manufacturing hot water-resistant PVOH coated paper by gas grafting palmitoyl chloride (I) – Penetration of palmitoyl chloride during gas grafting of PVOH-coated paper
- Effect of cellulose fiber graft copolymerization with glycidyl methacrylate on the papermaking process retention and drainage aid performance
- Packaging
- Edible film production using Aronia melanocarpa for smart food packaging
- Recycling
- Research on coating modification and application of papermaking Fenton sludge
- Nanotechnology
- Production of cellulose micro/nanofibrils with sodium silicate: impact on energy consumption, microstructure, crystallinity and stability of suspensions
- Miscellaneous
- Dewatering properties of pulps made from different parts of a Norway spruce (Picea abies)
- Network model for predicting structural properties of paper
