title: Reactive electrospinning of composite nanofibers of carboxymethyl chitosan cross-linked by alginate dialdehyde with the aid of polyethylene oxide.
abstract: We have prepared carboxymethyl chitosan-alginate dialdehyde (CMCS-ADA) nanofibers via a reactive electrospinning process with the aid of polyethylene oxide (PEO). The presence of PEO delayed the gelation of CMCS and ADA, thus providing ease of use to adjust the mixing of CMCS-PEO and ADA-PEO blended solution. The mixed solution can be adjusted to come out from the needle before the gel formation or when the gel was just about to form. Defect-free CMCS-ADA-PEO nanofibers with average diameters ranging from 100nm to 900nm were obtained using water as a solvent. The in situ cross-linked CMCS-ADA nanofibers were then obtained following the extraction of water-soluble PEO. After immersion in phosphate-buffered saline (PBS) at a pH of 7.4 for up to 15days, the as-spun CMCS-ADA-PEO composite nanofibers maintained structural integrity, confirming the success of the crosslinking. The PEO-extracted CMCS-ADA nanofibers promoted the adhesion, proliferation and alkaline phosphatase activity of bone marrow stromal cells.
authors.affiliation: National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, PR China; Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, PR China.
authors.forename: Xiujuan
authors.initials: X
authors.lastname: Zhao
authors.affiliation: National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, PR China; Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, PR China.
authors.forename: Si
authors.initials: S
authors.lastname: Chen
authors.affiliation: National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, PR China; Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, PR China.
authors.forename: Zifeng
authors.initials: Z
authors.lastname: Lin
authors.affiliation: National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, PR China; Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, PR China; Key Laboratory of Biomedical Materials Science and Engineering, Ministry of Education, Guangzhou 510006, PR China. Electronic address: duchang@scut.edu.cn.
authors.forename: Chang
authors.initials: C
authors.lastname: Du
mesh_terms: D000464:Alginates / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D055590:Electromagnetic Phenomena; D057139:Nanofibers / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*
chemical_list: D000464:Alginates; D011092:Polyethylene Glycols; D048271:Chitosan
keywords: Alginate dialdehyde; Carboxymethyl chitosan; Reactive electrospinning