TY - JOUR
T1 - Structures and Properties of Chitosan Based Porous Membranes
JO - Journal of Fiber Bioengineering and Informatics
VL - 2
SP - 101
EP - 113
PY - 2016
DA - 2016/05
SN - 9
DO - http://doi.org/10.3993/jfbim00234
UR - https://global-sci.org/intro/article_detail/jfbi/10595.html
KW - Chitosan (CS)
KW - Poly Lactic Acid (PLA)
KW - Poly (Vinyl Alcohol) (PVA)
KW - Lyophilization
KW - PorousMembrane
KW - Biodegradation
AB - In order to improve some defects of pure chitosan membrane, such as the high brittleness and poor
flexibility etc.. This paper adopted a simple and effective method to realize the performance optimization
by blending with Poly Lactic Acid (PLA) and Poly (Vinyl Alcohol) (PVA). The result indicated that
compared with pure CS membrane, moisture absorption rate and Water Vapor Transmission Rate
(WVTR) of CS ⁄ PLAand CS ⁄ PVAblend membranes have been greatly improved. With a certain amount
of the PLA or PVA, the breaking elongation of the blend membrane rise steadily. The physical properties
of CS ⁄ PLA blend membrane are better than the CS ⁄ PVA's, so the research for CS ⁄ PLA blend membrane
is expanded. With the Scanning Electron Microscopy (SEM) images, it observed that the CS ⁄ PLA blend
membrane's porosity is improved after freeze-drying, and have better porous structure, the pore size and
morphology with different blending ratios changed significantly. Besidethe SEM images, CS ⁄ PLA blend
membranes' Fourier transform infrared spectroscopy (FTIR) reveal that the strong hydrogen bonds
formed between CS and PLA, which is consistent with the conclusions of the Differential Scanning
Calorimetry (DSC). The DSC curve analysis shows that the decomposition temperatures of the blend
membrane decrease firstly and then increase with the decrease of CS content. The comprehensive
property of the porous membranes is optimal point where the CS content is 60%. The good properties,
such as moisture regain, porosity, and water vapor transmission rate, of the kind of CS ⁄ PLA or CS ⁄ PVA
blend membranes suggested a potential application in wound dressing.