{"title":"DEVELOPMENT OF COMBINED ORGANOSOLV-TEMPO OXIDATION TREATMENT FOR OBTAINING CELLULOSE NANOFIBRES","authors":"P. Ligero, A. de Vega, X. García","doi":"10.35812/cellulosechemtechnol.2023.57.05","DOIUrl":null,"url":null,"abstract":"The aim of this work was to study and optimize the production of nano-size cellulose fibrils (NFC) by combined performic acid treatment, totally chlorine-free (TCF) bleaching and TEMPO-oxidation prior to mechanical treatment. For this purpose, a face-centered design was developed in order to optimize the independent variables governing performic treatment. Under the optimal conditions, a kappa index of 13 was achieved, which decreased to 2.2 after bleaching treatment. These low-lignin pulps were TEMPO-oxidized under different oxidizing conditions, while monitoring cellulose yield, carboxylic acid content and the degree of polymerization. The optimized conditions produced oxidized pulp with 1.4 mmol COOH/g dried nanofibre. Finally, this oxidized cellulose was subjected to high-pressure mechanical processing in order to obtain cellulose nanofibres. From the results, it can be concluded that neither the number of homogenizer passes nor the pressure affected to diameter of fibrils.","PeriodicalId":10130,"journal":{"name":"Cellulose Chemistry and Technology","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cellulose Chemistry and Technology","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.35812/cellulosechemtechnol.2023.57.05","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, PAPER & WOOD","Score":null,"Total":0}
引用次数: 0
Abstract
The aim of this work was to study and optimize the production of nano-size cellulose fibrils (NFC) by combined performic acid treatment, totally chlorine-free (TCF) bleaching and TEMPO-oxidation prior to mechanical treatment. For this purpose, a face-centered design was developed in order to optimize the independent variables governing performic treatment. Under the optimal conditions, a kappa index of 13 was achieved, which decreased to 2.2 after bleaching treatment. These low-lignin pulps were TEMPO-oxidized under different oxidizing conditions, while monitoring cellulose yield, carboxylic acid content and the degree of polymerization. The optimized conditions produced oxidized pulp with 1.4 mmol COOH/g dried nanofibre. Finally, this oxidized cellulose was subjected to high-pressure mechanical processing in order to obtain cellulose nanofibres. From the results, it can be concluded that neither the number of homogenizer passes nor the pressure affected to diameter of fibrils.
期刊介绍：
Cellulose Chemistry and Technology covers the study and exploitation of the industrial applications of carbohydrate polymers in areas such as food, textiles, paper, wood, adhesives, pharmaceuticals, oil field applications and industrial chemistry.
Topics include:
• studies of structure and properties
• biological and industrial development
• analytical methods
• chemical and microbiological modifications
• interactions with other materials
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