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Composite microfibers fabrication based on interfacial complexation of tempo oxidized cellulose nanofibers and chitosan

Grant number: 17/20891-8
Support Opportunities:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): April 01, 2018
Effective date (End): March 31, 2019
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Antonio José Felix de Carvalho
Grantee:Rafael Grande
Supervisor: Orlando Jose Rojas Gaona
Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Research place: Aalto University, Finland  
Associated to the scholarship:15/07744-0 - A new process for preparation of thermoplastic blends with high polar polymers, BP.PD


The advances obtained by the research project (process 2015 / 07744-0), allowed the development of a methodology for the dispersion of polymers of high polarity in thermoplastic matrices besides the development of filaments where molecules of chitosan and modified cellulose nanofibrils (ToNFC) are self-organized through a liquid-liquid interface in a process called interfacial complexation of polyelectrolytes (IPC) giving rise to a new material. The initial results for obtaining chitosan/cellulose filaments have already been published in an international journal (Journal of Materials Chemistry A, 2017, 5, 13098-13103). However, for optimization of the mechanical characteristics of the filaments as well as a better understanding of the formation process of the filaments, a comprehensive study is required. The main objective is to investigate the role of the different process parameters for obtaining chitosan/cellulose filaments. Thus, the present work aims to give continuity in our studies on the production of chitosan/cellulose filaments by IPC and understand the relation to the process variables that should directly impact the mechanical characteristics of this material. Merging efforts with the Department of Bioproducts and Biosystems, School of Chemical Technology, Aalto University -Finland (Films, Filaments and Hybrid Materials Research) which has a spinning line in the liquid state could lead to a continuously drawing the filaments increasing the scale of production of this material in a significant way, in order to increase potential application of these filaments in different research fields. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
GRANDE, RAFAEL; BAI, LONG; WANG, LING; XIANG, WENCHAO; IKKALA, OLLI; CARVALHO, ANTONIO J. F.; ROJAS, ORLANDO J.. Nanochitins of Varying Aspect Ratio and Properties of Microfibers Produced by Interfacial Complexation with Seaweed Alginate. ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v. 8, n. 2, p. 1137-1145, . (17/20891-8)
AJDARY, RUBINA; HUAN, SIQI; EZAZI, NAZANIN ZANJANIZADEH; XIANG, WENCHAO; GRANDE, RAFAEL; SANTOS, HELDER A.; ROJAS, ORLANDO J.. Acetylated Nanocellulose for Single-Component Bioinks and Cell Proliferation on 3D-Printed Scaffolds. Biomacromolecules, v. 20, n. 7, p. 2770-2778, . (17/20891-8)
BAI, LONG; KAMARAINEN, TERO; XIANG, WENCHAO; MAJOINEN, JOHANNA; SEITSONEN, JANI; GRANDE, RAFAEL; HUAN, SIQI; LIU, LIANG; FAN, YIMIN; ROJAS, ORLANDO J.. Chirality from Cryo-Electron Tomograms of Nanocrystals Obtained by Lateral Disassembly and Surface Etching of Never-Dried Chitin. ACS NANO, v. 14, n. 6, p. 6921-6930, . (17/20891-8)

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