Enhanced Bleachability of Chemi-Thermomechanical Pulp by Hydrogen Peroxide Bleaching in Ethanol-Water Media
Hydrogen peroxide (H2O2) bleaching in ethanol-water media was used to improve the bleaching efficiency of the chemi-thermomechanical pulp (CTMP). The brightness of CTMP increased and the yellowness decreased when the ethanol ratio was increased to 50%. However, when more than 50% ethanol was added,...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
North Carolina State University
2023-01-01
|
| Series: | BioResources |
| Subjects: | |
| Online Access: | https://ojs.cnr.ncsu.edu/index.php/BRJ/article/view/22403 |
| _version_ | 1827916006902726656 |
|---|---|
| author | Jin Ho Seo Yu-jin Oh Kyojung Hwang Jaegyoung Gwon Byeong-Jun Ahn Kang-Jae Kim Tai-Ju Lee |
| author_facet | Jin Ho Seo Yu-jin Oh Kyojung Hwang Jaegyoung Gwon Byeong-Jun Ahn Kang-Jae Kim Tai-Ju Lee |
| author_sort | Jin Ho Seo |
| collection | DOAJ |
| description | Hydrogen peroxide (H2O2) bleaching in ethanol-water media was used to improve the bleaching efficiency of the chemi-thermomechanical pulp (CTMP). The brightness of CTMP increased and the yellowness decreased when the ethanol ratio was increased to 50%. However, when more than 50% ethanol was added, the brightness decreased, and the yellowness increased. In general, H2O2 bleaching in ethanol-water media, except for 100% ethanol, improved the optical properties of CTMP compared to conventional H2O2 bleaching. Moreover, the chemical composition of CTMP did not alter significantly. The best bleaching condition for CTMP was observed in 50% ethanol at a bleaching temperature and time of 80 °C and 120 min, respectively. The brightness of CTMP under this condition increased by approximately 22% compared with conventional H2O2 bleached CTMP. Principal component analysis (PCA) revealed that the optical properties of bleached CTMP were affected by the structural changes of the aromatic ring and carbonyl group in lignin and carbonyl group in hemicellulose. Consequently, the specific optimal ratio of ethanol that could improve the optical properties of CTMP was determined. The results can serve as a reference for fabricating improved CTMP for its practical application in high-grade papermaking. |
| first_indexed | 2024-03-13T03:07:48Z |
| format | Article |
| id | doaj.art-4fb164ce797c468dac662cfe0cd83a1b |
| institution | Directory Open Access Journal |
| issn | 1930-2126 |
| language | English |
| last_indexed | 2024-03-13T03:07:48Z |
| publishDate | 2023-01-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-4fb164ce797c468dac662cfe0cd83a1b2023-06-26T18:46:11ZengNorth Carolina State UniversityBioResources1930-21262023-01-0118117311741409Enhanced Bleachability of Chemi-Thermomechanical Pulp by Hydrogen Peroxide Bleaching in Ethanol-Water MediaJin Ho Seo0Yu-jin Oh1Kyojung Hwang2Jaegyoung Gwon3Byeong-Jun Ahn4Kang-Jae Kim5Tai-Ju Lee6Department of Forest Products and Industry, Division of Forest Industrial Materials, National Institute of Forest ScienceDepartment of Forest Products and Industry, Division of Forest Industrial Materials, National Institute of Forest ScienceDepartment of Forest Products and Industry, Division of Forest Industrial Materials, National Institute of Forest ScienceDepartment of Forest Products and Industry, Division of Forest Industrial Materials, National Institute of Forest ScienceDepartment of Forest Products and Industry, Division of Forest Industrial Materials, National Institute of Forest ScienceSchool of Forestry, Science and Landscape Architecture & Agricultural Science and Technology Research Institute, Kyungpook National UniversityDepartment of Forest Products and Industry, Division of Forest Industrial Materials, National Institute of Forest ScienceHydrogen peroxide (H2O2) bleaching in ethanol-water media was used to improve the bleaching efficiency of the chemi-thermomechanical pulp (CTMP). The brightness of CTMP increased and the yellowness decreased when the ethanol ratio was increased to 50%. However, when more than 50% ethanol was added, the brightness decreased, and the yellowness increased. In general, H2O2 bleaching in ethanol-water media, except for 100% ethanol, improved the optical properties of CTMP compared to conventional H2O2 bleaching. Moreover, the chemical composition of CTMP did not alter significantly. The best bleaching condition for CTMP was observed in 50% ethanol at a bleaching temperature and time of 80 °C and 120 min, respectively. The brightness of CTMP under this condition increased by approximately 22% compared with conventional H2O2 bleached CTMP. Principal component analysis (PCA) revealed that the optical properties of bleached CTMP were affected by the structural changes of the aromatic ring and carbonyl group in lignin and carbonyl group in hemicellulose. Consequently, the specific optimal ratio of ethanol that could improve the optical properties of CTMP was determined. The results can serve as a reference for fabricating improved CTMP for its practical application in high-grade papermaking.https://ojs.cnr.ncsu.edu/index.php/BRJ/article/view/22403ethanolhydrogen peroxidethermomechanical pulpoptical propertiesprincipal component analysis |
| spellingShingle | Jin Ho Seo Yu-jin Oh Kyojung Hwang Jaegyoung Gwon Byeong-Jun Ahn Kang-Jae Kim Tai-Ju Lee Enhanced Bleachability of Chemi-Thermomechanical Pulp by Hydrogen Peroxide Bleaching in Ethanol-Water Media BioResources ethanol hydrogen peroxide thermomechanical pulp optical properties principal component analysis |
| title | Enhanced Bleachability of Chemi-Thermomechanical Pulp by Hydrogen Peroxide Bleaching in Ethanol-Water Media |
| title_full | Enhanced Bleachability of Chemi-Thermomechanical Pulp by Hydrogen Peroxide Bleaching in Ethanol-Water Media |
| title_fullStr | Enhanced Bleachability of Chemi-Thermomechanical Pulp by Hydrogen Peroxide Bleaching in Ethanol-Water Media |
| title_full_unstemmed | Enhanced Bleachability of Chemi-Thermomechanical Pulp by Hydrogen Peroxide Bleaching in Ethanol-Water Media |
| title_short | Enhanced Bleachability of Chemi-Thermomechanical Pulp by Hydrogen Peroxide Bleaching in Ethanol-Water Media |
| title_sort | enhanced bleachability of chemi thermomechanical pulp by hydrogen peroxide bleaching in ethanol water media |
| topic | ethanol hydrogen peroxide thermomechanical pulp optical properties principal component analysis |
| url | https://ojs.cnr.ncsu.edu/index.php/BRJ/article/view/22403 |
| work_keys_str_mv | AT jinhoseo enhancedbleachabilityofchemithermomechanicalpulpbyhydrogenperoxidebleachinginethanolwatermedia AT yujinoh enhancedbleachabilityofchemithermomechanicalpulpbyhydrogenperoxidebleachinginethanolwatermedia AT kyojunghwang enhancedbleachabilityofchemithermomechanicalpulpbyhydrogenperoxidebleachinginethanolwatermedia AT jaegyounggwon enhancedbleachabilityofchemithermomechanicalpulpbyhydrogenperoxidebleachinginethanolwatermedia AT byeongjunahn enhancedbleachabilityofchemithermomechanicalpulpbyhydrogenperoxidebleachinginethanolwatermedia AT kangjaekim enhancedbleachabilityofchemithermomechanicalpulpbyhydrogenperoxidebleachinginethanolwatermedia AT taijulee enhancedbleachabilityofchemithermomechanicalpulpbyhydrogenperoxidebleachinginethanolwatermedia |