Jose Luis Sanchez-Salvador, Gunilla Pettersson, Amanda Mattsson, Angeles Blanco, Per Engstrand, Carlos Negro
{"title":"Extending the limits of using chemithermomechanical pulp by combining lignin microparticles and hot-pressing technology","authors":"Jose Luis Sanchez-Salvador, Gunilla Pettersson, Amanda Mattsson, Angeles Blanco, Per Engstrand, Carlos Negro","doi":"10.1007/s10570-024-06141-y","DOIUrl":null,"url":null,"abstract":"<p>A promising alternative to extend the limits of chemithermomechanical pulps (CTMPs) has been proposed to produce extremely resistant waterproof paper for use in sustainable packaging products, replacing plastics. The synergies between the incorporation of lignin microparticles (LMPs) in a pulp furnish (mass), with retention agents and hot-pressing technology, have been successfully tested in CTMP paper sheets. The addition of LMPs as a wet-strength agent, combined with the high temperature produced in hot-pressing, allows the softening of the LMPs to enhance mechanical properties. Two retention agents, cationic starch (CS) and chitosan (CH), have been studied to ensure the retention of the LMPs. Results show that both CS and CH remarkably improve the wet tensile index while maintaining or slightly increasing the dry tensile index. Regarding hot-pressing, three seconds of pressing is enough to achieve these properties, and some moisture (20%) in the sheets prior to pressing favors the wet strength. CH is not only the most promising retention agent, but it also significantly increases the wet tensile index (around 50 kNm/kg), maintaining more than 65% of the dry tensile index, creating an extremely resistant waterproof paper. Additionally, LMPs increase the short-span compression test (SCT) index by 180% and reduce air permeability 16 times compared to the untreated CTMP paper.</p>","PeriodicalId":511,"journal":{"name":"Cellulose","volume":null,"pages":null},"PeriodicalIF":4.9000,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Cellulose","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s10570-024-06141-y","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, PAPER & WOOD","Score":null,"Total":0}
引用次数: 0
Abstract
A promising alternative to extend the limits of chemithermomechanical pulps (CTMPs) has been proposed to produce extremely resistant waterproof paper for use in sustainable packaging products, replacing plastics. The synergies between the incorporation of lignin microparticles (LMPs) in a pulp furnish (mass), with retention agents and hot-pressing technology, have been successfully tested in CTMP paper sheets. The addition of LMPs as a wet-strength agent, combined with the high temperature produced in hot-pressing, allows the softening of the LMPs to enhance mechanical properties. Two retention agents, cationic starch (CS) and chitosan (CH), have been studied to ensure the retention of the LMPs. Results show that both CS and CH remarkably improve the wet tensile index while maintaining or slightly increasing the dry tensile index. Regarding hot-pressing, three seconds of pressing is enough to achieve these properties, and some moisture (20%) in the sheets prior to pressing favors the wet strength. CH is not only the most promising retention agent, but it also significantly increases the wet tensile index (around 50 kNm/kg), maintaining more than 65% of the dry tensile index, creating an extremely resistant waterproof paper. Additionally, LMPs increase the short-span compression test (SCT) index by 180% and reduce air permeability 16 times compared to the untreated CTMP paper.
期刊介绍:
Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.