Dual properties of the deacetylated sites in chitosan for molecular immobilization and biofunctional effects

Jiunn-Der Liao, Shu Ping Lin, Yi Te Wu

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Polypropylene nonwoven fabric was surface-activated by high-density oxygen microwave plasma, followed by graft copolymerization with acrylic acid (AAc) and then coupling with chitosan molecules. The pAAc-grafted surface containing C=O in carboxylic acid exhibited a hydrophilic character capable of promoting water absorbency. A larger portion of minimum 85% deacetylated sites in chitosan molecules was then coupled with the grafted pAAc (around 149 μg•cm-2) by forming amide bonds at their interface. The covalently bonded chitosan was weighted around 44 μg•cm-2. The smaller portion of the deacetylated sites demonstrated a distinctive structure as polycations, i.e., NH3+, on the immobilized chitosan. The respective structures following sequential reactions were identified using Fourier transform infrared-attenuated total reflection and X-ray photoelectron spectroscopy with peaks deconvolution. The NH3+ sites on the immobilized chitosan exhibited biofunctional in anticoagulation and in antibacterial property. Blood cells agglutination or agglomeration upon the chitosan-immobilized surface, in particular for red blood cells and platelets, resulted from hydrophilic effect derived from the grafted pAAc and the chitosan itself, and ionic attractions between polycations and blood cells. In addition, the agglutinated cells retained their original morphologies. It is therefore very promising to apply this durable chitosan-immobilized surface for making an antibacterial support, at the same time, for retaining blood cell affinity.

Original languageEnglish
Pages (from-to)392-399
Number of pages8
JournalBiomacromolecules
Volume6
Issue number1
DOIs
Publication statusPublished - 2005 Jan 1

Fingerprint

Chitosan
Blood
Cells
Molecules
Nonwoven fabrics
Polypropylenes
Deconvolution
Carboxylic Acids
Platelets
Carboxylic acids
Amides
Grafts
Copolymerization
Acrylics
Fourier transforms
Agglomeration
X ray photoelectron spectroscopy
Microwaves
Oxygen
Infrared radiation

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biomaterials
  • Polymers and Plastics
  • Materials Chemistry

Cite this

@article{87e7d764fe66490a8b56a6ced0dc0d6e,
title = "Dual properties of the deacetylated sites in chitosan for molecular immobilization and biofunctional effects",
abstract = "Polypropylene nonwoven fabric was surface-activated by high-density oxygen microwave plasma, followed by graft copolymerization with acrylic acid (AAc) and then coupling with chitosan molecules. The pAAc-grafted surface containing C=O in carboxylic acid exhibited a hydrophilic character capable of promoting water absorbency. A larger portion of minimum 85{\%} deacetylated sites in chitosan molecules was then coupled with the grafted pAAc (around 149 μg•cm-2) by forming amide bonds at their interface. The covalently bonded chitosan was weighted around 44 μg•cm-2. The smaller portion of the deacetylated sites demonstrated a distinctive structure as polycations, i.e., NH3+, on the immobilized chitosan. The respective structures following sequential reactions were identified using Fourier transform infrared-attenuated total reflection and X-ray photoelectron spectroscopy with peaks deconvolution. The NH3+ sites on the immobilized chitosan exhibited biofunctional in anticoagulation and in antibacterial property. Blood cells agglutination or agglomeration upon the chitosan-immobilized surface, in particular for red blood cells and platelets, resulted from hydrophilic effect derived from the grafted pAAc and the chitosan itself, and ionic attractions between polycations and blood cells. In addition, the agglutinated cells retained their original morphologies. It is therefore very promising to apply this durable chitosan-immobilized surface for making an antibacterial support, at the same time, for retaining blood cell affinity.",
author = "Jiunn-Der Liao and Lin, {Shu Ping} and Wu, {Yi Te}",
year = "2005",
month = "1",
day = "1",
doi = "10.1021/bm0494951",
language = "English",
volume = "6",
pages = "392--399",
journal = "Biomacromolecules",
issn = "1525-7797",
publisher = "American Chemical Society",
number = "1",

}

Dual properties of the deacetylated sites in chitosan for molecular immobilization and biofunctional effects. / Liao, Jiunn-Der; Lin, Shu Ping; Wu, Yi Te.

In: Biomacromolecules, Vol. 6, No. 1, 01.01.2005, p. 392-399.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dual properties of the deacetylated sites in chitosan for molecular immobilization and biofunctional effects

AU - Liao, Jiunn-Der

AU - Lin, Shu Ping

AU - Wu, Yi Te

PY - 2005/1/1

Y1 - 2005/1/1

N2 - Polypropylene nonwoven fabric was surface-activated by high-density oxygen microwave plasma, followed by graft copolymerization with acrylic acid (AAc) and then coupling with chitosan molecules. The pAAc-grafted surface containing C=O in carboxylic acid exhibited a hydrophilic character capable of promoting water absorbency. A larger portion of minimum 85% deacetylated sites in chitosan molecules was then coupled with the grafted pAAc (around 149 μg•cm-2) by forming amide bonds at their interface. The covalently bonded chitosan was weighted around 44 μg•cm-2. The smaller portion of the deacetylated sites demonstrated a distinctive structure as polycations, i.e., NH3+, on the immobilized chitosan. The respective structures following sequential reactions were identified using Fourier transform infrared-attenuated total reflection and X-ray photoelectron spectroscopy with peaks deconvolution. The NH3+ sites on the immobilized chitosan exhibited biofunctional in anticoagulation and in antibacterial property. Blood cells agglutination or agglomeration upon the chitosan-immobilized surface, in particular for red blood cells and platelets, resulted from hydrophilic effect derived from the grafted pAAc and the chitosan itself, and ionic attractions between polycations and blood cells. In addition, the agglutinated cells retained their original morphologies. It is therefore very promising to apply this durable chitosan-immobilized surface for making an antibacterial support, at the same time, for retaining blood cell affinity.

AB - Polypropylene nonwoven fabric was surface-activated by high-density oxygen microwave plasma, followed by graft copolymerization with acrylic acid (AAc) and then coupling with chitosan molecules. The pAAc-grafted surface containing C=O in carboxylic acid exhibited a hydrophilic character capable of promoting water absorbency. A larger portion of minimum 85% deacetylated sites in chitosan molecules was then coupled with the grafted pAAc (around 149 μg•cm-2) by forming amide bonds at their interface. The covalently bonded chitosan was weighted around 44 μg•cm-2. The smaller portion of the deacetylated sites demonstrated a distinctive structure as polycations, i.e., NH3+, on the immobilized chitosan. The respective structures following sequential reactions were identified using Fourier transform infrared-attenuated total reflection and X-ray photoelectron spectroscopy with peaks deconvolution. The NH3+ sites on the immobilized chitosan exhibited biofunctional in anticoagulation and in antibacterial property. Blood cells agglutination or agglomeration upon the chitosan-immobilized surface, in particular for red blood cells and platelets, resulted from hydrophilic effect derived from the grafted pAAc and the chitosan itself, and ionic attractions between polycations and blood cells. In addition, the agglutinated cells retained their original morphologies. It is therefore very promising to apply this durable chitosan-immobilized surface for making an antibacterial support, at the same time, for retaining blood cell affinity.

UR - http://www.scopus.com/inward/record.url?scp=14044262108&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=14044262108&partnerID=8YFLogxK

U2 - 10.1021/bm0494951

DO - 10.1021/bm0494951

M3 - Article

VL - 6

SP - 392

EP - 399

JO - Biomacromolecules

JF - Biomacromolecules

SN - 1525-7797

IS - 1

ER -