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Sochilina AV, Akasov RA, Arkharova NA, Klechkovskaya VV, Mironov AV, Prostyakova AI, Sholina NV, Zubov VP, Generalova AN, Vikhrov AA. Fabrication of moldable chitosan gels via thermally induced phase separation in aqueous alcohol solutions. Int J Biol Macromol 2022; 215:501-511. [PMID: 35716792 DOI: 10.1016/j.ijbiomac.2022.06.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 06/08/2022] [Accepted: 06/12/2022] [Indexed: 01/09/2023]
Abstract
Wide application of chitosan in modern technologies is limited by the lack of reliable and low-cost techniques to prepare size-tuned constructs with a complex surface morphology, improved optical and mechanical properties. We report a new simple method for preparation of transparent thermoreversible chitosan alcogels from chitosan/H2O/ethanol ternary systems. This method, termed "low temperature thermally induced phase separation under non-freezing conditions" (LT-TIPS-NF), fine tunes gelation by adjusting only temperature (from 5 to -25 °C) and varying the initial content of chitosan (from 0.5 to 2.0 wt%) and ethanol (from 28.5 to 47.5 vol%). Transparent non-swelling final constructs of complex shape are prepared by fixing the pre-formed alcogels with a base solution. The size of the gel constructs is limited only by the dimensions of the mold and the cooling chamber. The LT-TIPS-NF is applicable both in injection molding and 3D printing techniques. The in vitro and in vivo experiments show the absence of prominent cytotoxicity and well-defined cell adhesion on the obtained hydrogels. Thus, this facile and scalable technique provides the multifunctional chitosan gel preparation with easily controlled properties exploiting inexpensive, renewable, and environmentally friendly source polysaccharide. These materials have prospects for a variety of uses, especially for biomedical applications.
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Affiliation(s)
- Anastasia V Sochilina
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of Russian Academy of Sciences, Miklukho-Maklaya str., 16/10, Moscow 117997, Russia; Federal Scientific Research Centre "Crystallography and Photonics" RAS, Leninsky prospect, 59, Moscow 119333, Russia.
| | - Roman A Akasov
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of Russian Academy of Sciences, Miklukho-Maklaya str., 16/10, Moscow 117997, Russia; Federal Scientific Research Centre "Crystallography and Photonics" RAS, Leninsky prospect, 59, Moscow 119333, Russia; I.M. Sechenov First Moscow State Medical University, Trubetskaya St., 8/2, Moscow 119991, Russia
| | - Natalia A Arkharova
- Federal Scientific Research Centre "Crystallography and Photonics" RAS, Leninsky prospect, 59, Moscow 119333, Russia
| | - Vera V Klechkovskaya
- Federal Scientific Research Centre "Crystallography and Photonics" RAS, Leninsky prospect, 59, Moscow 119333, Russia
| | - Anton V Mironov
- Federal Scientific Research Centre "Crystallography and Photonics" RAS, Leninsky prospect, 59, Moscow 119333, Russia
| | - Anna I Prostyakova
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of Russian Academy of Sciences, Miklukho-Maklaya str., 16/10, Moscow 117997, Russia
| | - Natalya V Sholina
- Federal Scientific Research Centre "Crystallography and Photonics" RAS, Leninsky prospect, 59, Moscow 119333, Russia; Morozovskaya Children's City Clinical Hospital, 4th Dobryninsky Lane, 1/9, Moscow 119049, Russia
| | - Vitaly P Zubov
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of Russian Academy of Sciences, Miklukho-Maklaya str., 16/10, Moscow 117997, Russia
| | - Alla N Generalova
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of Russian Academy of Sciences, Miklukho-Maklaya str., 16/10, Moscow 117997, Russia
| | - Alexander A Vikhrov
- Shemyakin & Ovchinnikov Institute of Bioorganic Chemistry of Russian Academy of Sciences, Miklukho-Maklaya str., 16/10, Moscow 117997, Russia
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Schnell CN, Galván MV, Solier YN, Inalbon MC, Zanuttini MA, Mocchiutti P. High strength biobased films prepared from xylan/chitosan polyelectrolyte complexes in the presence of ethanol. Carbohydr Polym 2021; 273:118602. [PMID: 34561002 DOI: 10.1016/j.carbpol.2021.118602] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 08/06/2021] [Accepted: 08/22/2021] [Indexed: 12/18/2022]
Abstract
The effect of different ethanol concentrations (0; 3; 9; 12 and 16 wt%) on the degree of ionization of xylan and chitosan, the characteristics of polyelectrolyte complex (PEC) suspensions, and the derived films, were exhaustively analyzed through several analytical techniques. Results indicate that the degree of ionization of both polyelectrolytes was reduced, whereas particle sizes and z-potential values of PEC suspensions were remarkably modified. As ethanol concentration was increased up to 12 wt%, the crystallinity of films decreased. Furthermore, the stress at break increased from 45 to 75 MPa. Wet stress-strain results were promising (up to 5.0 MPa, 55%) for all films. Although water vapor permeability was not modified, the swelling capacity was favorably reduced (12%). Results reveal that, for preparing films, it might not be necessary to remove all the ethanol used for xylan precipitation and purification.
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Affiliation(s)
- Carla N Schnell
- Instituto de Tecnología Celulósica, Facultad de Ingeniería Química (FIQ-CONICET), Universidad Nacional del Litoral, Santiago del Estero 2654, S3000AOJ Santa Fe, Argentina.
| | - María V Galván
- Instituto de Tecnología Celulósica, Facultad de Ingeniería Química (FIQ-CONICET), Universidad Nacional del Litoral, Santiago del Estero 2654, S3000AOJ Santa Fe, Argentina.
| | - Yamil N Solier
- Instituto de Tecnología Celulósica, Facultad de Ingeniería Química (FIQ-CONICET), Universidad Nacional del Litoral, Santiago del Estero 2654, S3000AOJ Santa Fe, Argentina.
| | - María C Inalbon
- Instituto de Tecnología Celulósica, Facultad de Ingeniería Química (FIQ-CONICET), Universidad Nacional del Litoral, Santiago del Estero 2654, S3000AOJ Santa Fe, Argentina.
| | - Miguel A Zanuttini
- Instituto de Tecnología Celulósica, Facultad de Ingeniería Química (FIQ-CONICET), Universidad Nacional del Litoral, Santiago del Estero 2654, S3000AOJ Santa Fe, Argentina.
| | - Paulina Mocchiutti
- Instituto de Tecnología Celulósica, Facultad de Ingeniería Química (FIQ-CONICET), Universidad Nacional del Litoral, Santiago del Estero 2654, S3000AOJ Santa Fe, Argentina.
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