About This Journal
About This Journal
Journal of Korea TAPPI (or ‘Palpuchongi Gisul’, abbr. ‘J. of Korea TAPPI, herein ‘KTAPPI’; ISSN: 0253-3200 ) was launched in 1969 to provides advance the scientific knowledge and to share the novel technologies in all related area of pulp, paper and biomass utilization. KTAPPI is published in English and Korean, bimonthly on the last day of even number months (February 28, April 30, June 30, August 31, October 31 and December 31), and indexed in ‘SCPOUS.
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Research Article
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Effects of High-Consistency Pulping and Kneading on Recovery of Hydrophilicity and Strength of Recycled Paper Based on Fibers Hydrophobized by Gas Grafting with Palmitoyl Chloride
염화팔미토일의 기상 그라프트 반응으로 소수화한 종이의 재생 시 친수성, 강도 회복을 위한 고농도 해리 및 니딩 처리의 효과
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Min Su Kim, Min Ji Kim, Min Ho Jeong, Min Ki Cho, Jeong-Yong Ryu
김민수, 김민지, 정민호, 조민기, 류정용
- As environmental pollution problems arise due to the use of plastic, efforts are underway to replace it with ecofriendly materials. Gas grafting …
- As environmental pollution problems arise due to the use of plastic, efforts are underway to replace it with ecofriendly materials. Gas grafting has ability to render cellulose surfaces hydrophobic, thereby imparting water resistance to paper. However, this hydrophobization poses challenges in recycling because disintegrating pulp fibers is difficult because of their poor wetting, and a reduction in hydroxyl groups adversely affects the absorbency and strength of recycled paper. In this study, we analyzed the effects of high-consistency pulping and kneading on the hydrophilicity and strength of recycled paper made from hydrophobized fiber through gas grafting with palmitoyl chloride. Experimental results indicate that high-consistency pulping was advantageous for recovering the hydrophilicity and strength of recycled paper based on hydrophobized fibers. During the kneading process, only hydrophilicity was recovered while the curling of fibers resulted in insufficient strength improvement. - COLLAPSE
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Effects of High-Consistency Pulping and Kneading on Recovery of Hydrophilicity and Strength of Recycled Paper Based on Fibers Hydrophobized by Gas Grafting with Palmitoyl Chloride
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Research Article
- Research on Innovative Design of Yangzhou Paper-cut Art Based on TRIZ Theory
- Jiaoyan Liu
- In the development of Yangzhou paper-cut, easy-to-use and reliable redesign methods are unavailable, which leads to the serious homogenization of its cultural …
- In the development of Yangzhou paper-cut, easy-to-use and reliable redesign methods are unavailable, which leads to the serious homogenization of its cultural and creative products. In response to this issue, this paper applies the TRIZ (Theory of Inventive Problem Solving) to the innovative design of Yangzhou paper-cut art. Firstly, it introduces the core idea and main content of TRIZ theory. Secondly, it analyzes the theme, image and expression techniques of Yangzhou paper-cut art, and explores its cultural connotation. Finally, it applies the theory of invention and creation of TRIZ to solve the problems of Yangzhou paper-cut art innovation and describes the results of eight specific design cases. This passage provides a reference for the creative generation, functional innovation and optimization process of Yangzhou paper-cut art products, which is of certain practical significance. - COLLAPSE
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Research Article
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Analysis of Fiber Orientation of Paper using Pilot Machine with Open Headbox: Effect of Stock Dispersion at Headbox
오픈 헤드박스형 파일럿 초지기의 섬유 배향 분석: 지료의 분산에 따른 영향
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Kyoung-Hwa Choi, Kwang Seob Lee, Cheol Woo Lee, Jeong-Yong Ryu
최경화, 이광섭, 이철우, 류정용
- In this study, it was explored whether it is possible to improve the fiber orientation and formation of paper by controlling the …
- In this study, it was explored whether it is possible to improve the fiber orientation and formation of paper by controlling the flow of the fiber dispersion in the headbox during papermaking using a pilot scale wet-web forming machine having open type headbox. After preparing paper specimens by adjusting the height of the turbulence plate and the height of the slice opening of the headbox, the physical properties of each paper specimen, such as CD and MD tensile strength and bond strength, were measured and compared. As the gap between the bottom of the headbox and the turbulence plate or the gap of slice was smaller, that is, the flow velocity of the stock were increased, fibers of the paper were oriented in the machine direction and the formation was relatively good. These results indicate that it is possible to change the fiber orientation and formation of paper by controlling the flow of the stock at the headbox. - COLLAPSE
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Analysis of Fiber Orientation of Paper using Pilot Machine with Open Headbox: Effect of Stock Dispersion at Headbox
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Research Article
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Impact of Cellulases Treatment on Pulp Surface and Chemical Composition
셀룰로오스 분해 효소처리가 섬유의 표면과 화학조성에 미치는 영향
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Won-Gyeom Shin, Yoon-Hyuck Choi, Soo-Jeong Shin
신원겸, 최윤혁, 신수정
- Reducing energy consumption in the papermaking process is a critical challenge for the paper industry. One method to decrease energy usage in …
- Reducing energy consumption in the papermaking process is a critical challenge for the paper industry. One method to decrease energy usage in the refining process is the enzymatic pretreatment of pulp. Two different enzymes applied as pure cellulases (Celluclast® 1.5) and mixtures of cellulase and xylanase (Viscoflow® MG). Different dose of enzymes as 1.0, 2.0 and 4.0 IU were added to treat hardwood bleached kraft pulp at 50℃ for 60 minutes. SEM analysis confirmed fibrillation on the fiber surfaces of both cellulase-treated and mixed enzyme-treated pulps, indicating external fibrillation effects, which were more pronounced with cellulase. Compositial analysis of polysaccharides by 1H-NMR analysis showed that the mixed enzyme-treated pulp had reduced xylan content. which led less glucuronic acid content in pulp after enzyme hydrolysis. Cellulase only containing enzyme was more effective than cellulase and xylan mixture or water retention value increase as 51% up vs 41% up. Cellulase only enzyme was more effective than cellulase and xylanase mixture in enhancing fiber fibrillation, which led to more water retention. - COLLAPSE
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Impact of Cellulases Treatment on Pulp Surface and Chemical Composition
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Research Article
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Color Fastness Assessment of Powdered Natural Dyestuffs under Accelerated Aging
분말화 천연염료의 인공열화에 따른 색상 견뢰도
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Jong-Seop Oh, Yu-Ju Lee, Su-Un Hyeon, Sang-Hyun Lee, Tae-Ho Choi
오종섭, 이유주, 현수운, 이상현, 최태호
- In the analysis of dyeing cultural heritage, Color is one of the factors used for estimating dyestuffs, and dyestuff color changes due …
- In the analysis of dyeing cultural heritage, Color is one of the factors used for estimating dyestuffs, and dyestuff color changes due to aging must be examined. This study analyzed the degradation characteristics of powdered natural dyestuffs using a spectrophotometer. The dyestuffs used in the assessment to color fastness experiment included Sappan wood for red dyeing, Amur cork tree for yellow dyeing, indigo for blue dyeing, cupules of acorns for brown dyeing, and gallnuts for black dyeing. The powdered dyestuffs were subjected to ultraviolet(UV) irradiation as well as dry thermal, and wet thermal accelerated aging. Dyestuff powder pellets were prepared to measure color changes before and after accelerated aging. Results of dyestuff pellet color analysis showed that the Sappan wood exhibited the best color fastness under UV irradiation and the worst under dry thermal aging. Similarly, Amur cork, acorn cupule, and gallnut dyestuffs displayed good color fastness under UV irradiation but poor color fastness under wet thermal aging. By contrast, indigo dyestuff exhibited excellent color fastness under all aging conditions. - COLLAPSE
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Color Fastness Assessment of Powdered Natural Dyestuffs under Accelerated Aging
Journal of Korea TAPPI
