Cellulose Regeneration and Chemical Recycling: Closing the ``Cellulose Gap{''} Using Environmentally Benign Solvents

Autor(es)

El Seoud, Omar A. ^[1] ; Kostag, Marc ^[1] ; Jedvert, Kerstin ^[2] ; Malek, Naved I. ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem, Prof Lineu Prestes Av 748, BR-05508000 Sao Paulo - Brazil

^[2] Res Inst Sweden RISE IVF, Fiber Dev Mat & Prod, Box 104, SE-43122 Molndal - Sweden

^[3] Sardar Vallabhbhai Natl Inst Technol, Appl Chem Dept, Surat 395007, Gujarat - India

• Tipo de documento: Artigo de Revisão
• Fonte: MACROMOLECULAR MATERIALS AND ENGINEERING; v. 305, n. 4 FEB 2020.
• Citações Web of Science: 10

Resumo

Strategies to mitigate the expected ``cellulose gap{''} include increased use of wood cellulose, fabric reuse, and recycling. Ionic liquids (ILs) are employed for cellulose physical dissolution and shaping in different forms. This review focuses on the regeneration of dissolved cellulose as nanoparticles, membranes, nonwoven materials, and fibers. The solvents employed in these applications include ILs and alkali solutions without and with additives. Cellulose fibers obtained via the carbonate and carbamate processes are included. Chemical recycling (CR) of polycotton (cellulose plus poly(ethylene terephthalate)) is addressed because depending on the recycling approach employed, this process is akin to regeneration. The strategies investigated in CR include preferential dissolution or depolymerization of one component of the blend, and separation of both components using ILs. It is hoped that this review focuses the attention on the potential applications of regenerated cellulose from its solutions and contributes to the important environmental issue of recycling of used materials. (AU)

• Processo FAPESP: 17/06394-1 - EMU concedido no processo 2014/22136-4: calorímetro de titulação isotérmica (ITC) para determinação dos parâmetros termodinâmicos de interações moleculares
• Beneficiário: Omar Abou El Seoud
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 14/22136-4 - Uso de solventes verdes e suas misturas na otimização de processos químicos
• Beneficiário: Omar Abou El Seoud
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/22869-7 - Novos solventes na química da celulose: síntese, propriedades e aplicações de eletrólitos quaternários de amônio para a dissolução, regeneração e derivatização de celulose
• Beneficiário: Marc Kostag
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado