Improved Strength of Peroxide-Bleached Deinked Pulp after TEMPO-Mediated Oxidation at Medium Consistency
Deinked pulp was pretreated using the 4-acetamido-2,2,6,6,- tetramethyl-pipelidine-1-oxyl radical (TEMPO)/NaBr/NaClO system and then bleached using hydrogen peroxide to achieve a medium pulp consistency. The effect of the amount of oxidant NaClO addition on the peroxide bleaching of deinked pulp was...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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North Carolina State University
2015-08-01
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| Series: | BioResources |
| Subjects: | |
| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_4_6586_Hua_Improved_Strength_Peroxide_Bleached_Pulp |
| _version_ | 1819064475933736960 |
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| author | Feiguo Hua Shuhua Tong Rendang Yang Bin Wang Fei Yang |
| author_facet | Feiguo Hua Shuhua Tong Rendang Yang Bin Wang Fei Yang |
| author_sort | Feiguo Hua |
| collection | DOAJ |
| description | Deinked pulp was pretreated using the 4-acetamido-2,2,6,6,- tetramethyl-pipelidine-1-oxyl radical (TEMPO)/NaBr/NaClO system and then bleached using hydrogen peroxide to achieve a medium pulp consistency. The effect of the amount of oxidant NaClO addition on the peroxide bleaching of deinked pulp was studied. The treated pulp was characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The characterization of XRD and SEM showed that the treated pulp had a higher degree of crystallinity and more fibrillation than untreated pulp. Fiber quality analysis also revealed that the treated pulps had more fines and shorter fiber length than the untreated pulp. A handsheet test showed that the deinked pulps pretreated with the TEMPO system exhibited high tensile index values. The tensile index of the TEMPO pretreated pulp was 17% higher than that of the pulp bleached by hydrogen peroxide alone. |
| first_indexed | 2024-12-21T15:31:10Z |
| format | Article |
| id | doaj.art-2c7095ba24764f30a4b206f29347b6d8 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-12-21T15:31:10Z |
| publishDate | 2015-08-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-2c7095ba24764f30a4b206f29347b6d82022-12-21T18:58:46ZengNorth Carolina State UniversityBioResources1930-21261930-21262015-08-011046586659610.15376/biores.10.4.6586-6596Improved Strength of Peroxide-Bleached Deinked Pulp after TEMPO-Mediated Oxidation at Medium ConsistencyFeiguo Hua0Shuhua Tong1Rendang Yang2Bin Wang3Fei Yang4School of Light Industry and Food Sciences, South China University of Technology; China Zhejiang Jinchang Paper Co., Ltd., Longyou, 324404, China; ChinaState Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China; ChinaState Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China; Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education of China, Qilu University of Technology, Jinan, 250353, China; ChinaState Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China; Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education of China, Qilu University of Technology, Jinan, 250353, China; ChinaDeinked pulp was pretreated using the 4-acetamido-2,2,6,6,- tetramethyl-pipelidine-1-oxyl radical (TEMPO)/NaBr/NaClO system and then bleached using hydrogen peroxide to achieve a medium pulp consistency. The effect of the amount of oxidant NaClO addition on the peroxide bleaching of deinked pulp was studied. The treated pulp was characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The characterization of XRD and SEM showed that the treated pulp had a higher degree of crystallinity and more fibrillation than untreated pulp. Fiber quality analysis also revealed that the treated pulps had more fines and shorter fiber length than the untreated pulp. A handsheet test showed that the deinked pulps pretreated with the TEMPO system exhibited high tensile index values. The tensile index of the TEMPO pretreated pulp was 17% higher than that of the pulp bleached by hydrogen peroxide alone.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_4_6586_Hua_Improved_Strength_Peroxide_Bleached_PulpDeinked pulpTEMPO/NaBr/NaClO systemHydrogen peroxide bleachingMedium consistency |
| spellingShingle | Feiguo Hua Shuhua Tong Rendang Yang Bin Wang Fei Yang Improved Strength of Peroxide-Bleached Deinked Pulp after TEMPO-Mediated Oxidation at Medium Consistency BioResources Deinked pulp TEMPO/NaBr/NaClO system Hydrogen peroxide bleaching Medium consistency |
| title | Improved Strength of Peroxide-Bleached Deinked Pulp after TEMPO-Mediated Oxidation at Medium Consistency |
| title_full | Improved Strength of Peroxide-Bleached Deinked Pulp after TEMPO-Mediated Oxidation at Medium Consistency |
| title_fullStr | Improved Strength of Peroxide-Bleached Deinked Pulp after TEMPO-Mediated Oxidation at Medium Consistency |
| title_full_unstemmed | Improved Strength of Peroxide-Bleached Deinked Pulp after TEMPO-Mediated Oxidation at Medium Consistency |
| title_short | Improved Strength of Peroxide-Bleached Deinked Pulp after TEMPO-Mediated Oxidation at Medium Consistency |
| title_sort | improved strength of peroxide bleached deinked pulp after tempo mediated oxidation at medium consistency |
| topic | Deinked pulp TEMPO/NaBr/NaClO system Hydrogen peroxide bleaching Medium consistency |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_4_6586_Hua_Improved_Strength_Peroxide_Bleached_Pulp |
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