Article
Materials Science, Paper & Wood
Antti Koistinen, Josphat Phiri, Kavindra Kumar Kesari, Tapani Vuorinen, Thaddeus Maloney
Summary: This study investigates the impact of pulp prehydrolysis conditions on pulp structure, dissolution in a cold NaOH/ZnO solvent, and properties of regenerated cellulose films. The results show that hydrolysis significantly improves the dissolution of pulp and affects the swelling and pore structure of the resulting films. Surprisingly, higher hydrolysis temperature does not lead to increased fiber hornification, and low temperature hydrolysis results in more porous films after drying.
Review
Materials Science, Multidisciplinary
Sarah Husnaini Zainal, Nurul Hanisah Mohd, Nabilah Suhaili, Farah Hannan Anuar, Azwan Mat Lazim, Rizafizah Othaman
Summary: Cellulose, the most abundant natural organic polymer on earth, has low solubility in water and most organic solvents. Specific solvent systems are required for cellulose applications. Hydrogel, as a 3D network structure, can retain a tremendous amount of water and highly depends on the crosslinking property.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Biochemistry & Molecular Biology
Dongyong Li, Yiruo Chen, Yimin Xie, Qinghua Feng
Summary: In this study, a renewable cellulose film containing lignin was prepared using a NMMO solvent system. The film exhibited excellent mechanical and optical properties, and could be a potential substitute for petrochemical plastics and a way to utilize agricultural waste.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Paper & Wood
Sachin Jadhav, Ashwini Lidhure, Shirish Thakre, Vivek Ganvir
Summary: Utilization of low-cost paper grade pulp in Lyocell process is not feasible due to impurities that degrade cellulose and lower the onset temperature. Modified Lyocell process with pretreatment of pulps removes impurities and improves dissolution speed and safety, providing a practical solution for using cheaper pulp grades.
Review
Polymer Science
Aleksandra Mikhailidi, Irina Volf, Dan Belosinschi, Bogdan-Marian Tofanica, Elena Ungureanu
Summary: Metallogels are materials formed by complexing polymer gels with metal ions that can coordinate with the gel's functional groups. Hydrogels made of cellulose are of particular interest due to their low cost, renewable nature, versatility, non-toxicity, mechanical and thermal stability, porous structure, reactive OH groups, and biocompatibility. Various techniques exist for preparing hydrogels from non-derivatized cellulose, including plant-derived cellulose and cellulose wastes. This review discusses the advantages and limitations of solvent use in industrial scaling up, as well as the methods for preparing cellulose metallogels with d-transition metals.
Article
Materials Science, Paper & Wood
Saija Vaisanen, Harri Kosonen, Matti Ristolainen, Tapani Vuorinen
Summary: The study found that hydrolysis under medium consistency (10%) conditions can increase the solubility of cellulose, while hydrolysis under high consistency (50%) conditions only increases solubility to a certain extent, with prolonged treatment causing fiber aggregation and poor dissolution. Additionally, viscosity needs to decrease to a certain level for fiber dissolution to occur.
Article
Materials Science, Multidisciplinary
Hussein Abou-Yousef, Samir Kamel
Summary: The demand for environmentally friendly materials is increasing and this study focused on producing a new class of high-strength and biodegradable materials called all-cellulose composites (ACC) through three strategies. The first strategy involved pressing cellulose fibers at different temperatures without using a solvent. The second and third strategies involved partial and complete dissolution of cellulose fibers using a Urea/NaOH solvent system. Characterizations were conducted to examine the effect of processing conditions on the morphological changes, crystallinity, and thermal stability of cellulose fibers. The non-solvent ACC showed the highest mechanical properties, crystallinity, and thermal stability.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Chen Gong, Jianping Ni, Shujie Fan, Yu Zhang, Bin Yang, Zhenhua Su
Summary: This study successfully upgraded paper-grade pulp to dissolving pulp for Lyocell fiber production through caustic extraction, acid treatment, and enzymatic treatment. The prepared pulp exhibited competitive properties compared to commercial Lyocell-grade dissolving pulp. The study also characterized the properties of the prepared pulp, assessed its dissolution properties, and evaluated the spinnability and stability of Lyocell solution using the prepared sample, thereby providing a theoretical basis for upgrading paper-grade pulp to dissolving pulp for Lyocell fiber production.
Article
Chemistry, Applied
Xiaoning Tang, Gaozhe Liu, Heng Zhang, Xin Gao, Meng Li, Shumei Zhang
Summary: The study introduced a novel, facile, and green method for creating a new all-cellulose composite using inorganic molten salt solvent. Different native fibers exhibited varying mechanical properties and thermal stability after the welding process, with pine showing excellent properties and corn stalk displaying stronger features compared to eucalyptus. The welding technique using inorganic metal salt hydrate offers a promising route to produce firm sheet-materials with micro or nano-structures from natural fibers.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Multidisciplinary
Sataporn Malarat, Dilawin Khongpun, Kanokkorn Limtong, Napasin Sinthuwong, Pornpinun Soontornapaluk, Chularat Sakdaronnarong, Pattaraporn Posoknistakul
Summary: This research investigated the value-added potential of coffee pulp fiber as a reinforcement in composite materials. Nanocellulose coffee pulp (NCP) was prepared from coffee pulp (CP) and used as a filler in a polyvinyl alcohol (PVA) matrix to improve the properties of PVA composites. The presence of NCP in the PVA matrix improved the physical properties of the nanocomposite film.
Article
Chemistry, Inorganic & Nuclear
Nabil A. Ibrahim, Mohamed S. Hasanin, Samir Kamel
Summary: In this study, low-cost antimicrobial cellulose was developed by adding acrylamide during the chlorite bleaching process. The modified cellulose exhibited promising antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Candida albicans. The results confirmed the successful loading of acrylamide onto cellulose fibers.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Polymer Science
Xincai Li, Jiachuan Chen, Baobin Wang, Lei Zhang, Kai Zhang, Guihua Yang
Summary: Grasses, specifically wheat straw, were mechanically treated and then delignified using a deep eutectic solvent in order to produce high-quality dissolving pulp. The optimal conditions for the solvent treatment were found to be 110°C for 6 hours with a solid-liquid ratio of 1:40. The treatment resulted in a lignin removal rate of 82.92% and an increase in glucose content of the pulp by 11.42%. The combined mechanical and deep eutectic solvent treatment effectively removed lignin from wheat straw, achieving a total utilization rate of 72%.
Article
Materials Science, Paper & Wood
Stephanie Christau, Elif Alyamac-Seydibeyoglu, Kayla Thayer, William M. Gramlich
Summary: In this study, a simple grafting-through polymerization approach was used to attach various polymeric surface modifications to BSKP. The modified and unmodified BSKP samples were evaluated for fibrillation and the effect of the polymeric surface modifications on WRVfiltration was studied.
Article
Chemistry, Applied
Junchai Zhao, Mengwei Deng, Shuaiyao Li, Zheng Guan, Yixuan Xia, Jinhui Yang, Xiaobo Lin
Summary: A facile method to fabricate cellulose nanocrystals with high yield from microcrystalline cellulose at room temperature is achieved by using a new solvent system of zinc chloride and hydrochloric acid. This method provides a simple and energy-saving strategy for the preparation of cellulose nanomaterials.
CARBOHYDRATE POLYMERS
(2022)
Article
Chemistry, Multidisciplinary
Pauliina Ahokas, Alexey Khakalo, Aayush Jaiswal, Tetyana Koso, Alistair W. T. King, Elisa Spo''nla, Ali Harlin, Hannes Orelma
Summary: Regenerated cellulose products are gaining attention as sustainable alternatives to petroleum-based materials. Ionic liquids are considered green options for cellulose dissolution. This study investigates the influence of hemicellulose content on solubility and regeneration ability of softwood kraft pulps using a novel recyclable superbase-based IL.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Applied
Sara R. Labafzadeh, Kashmira Vyavaharkar, Jari S. Kavakka, Alistair W. T. King, Ilkka Kilpelainen
CARBOHYDRATE POLYMERS
(2015)
Article
Chemistry, Multidisciplinary
Somdatta Deb, Sara R. Labafzadeh, Unna Liimatainen, Arno Parviainen, Lauri K. J. Hauru, Shoaib Azhar, Martin Lawoko, Tuomas Kulomaa, Tia Kakko, Juha Fiskari, Marc Borrega, Herbert Sixta, Ilkka Kilpelainen, Alistair W. T. King
Article
Materials Science, Paper & Wood
Sara R. Labafzadeh, Jari S. Kavakka, Katja Sievanen, Janne Asikkala, Ilkka Kilpelainen
Article
Chemistry, Multidisciplinary
Sara R. Labafzadeh, K. Juhani Helminen, Ilkka Kilpelainen, Alistair W. T. King
Article
Green & Sustainable Science & Technology
Vahid Jafari, Sara Rahim Labafzadeh, Azam Jeihanipour, Keikhosro Karimi, Mohammad J. Taherzadeh
Meeting Abstract
Chemistry, Multidisciplinary
Sara R. Labafzadeh, Jari S. Kavakka, Katja Sievanen, Janne Asikkala, Ilkka Kilpelainen
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2012)