Preparation of ultrafine oxidized cellulose mats via electrospinning.
Ultrafine oxidized cellulose (OC) mats were prepared by oxidation of ultrafine cellulose mats produced by electrospinning and subsequent deacetylation of cellulose acetate for potential applications in nonwoven adhesion barriers. When ultrafine cellulose mats were oxidized with a mixture of HNO3/H3PO4 - NaNO2 (2/1/1.4 v/v/wt %), their ultrafine mat structure remained unchanged. The yield and carboxyl content of OC mats were 86.7% and 16.8%, respectively. OC showed lower crystallinity than cellulose because the oxidation of cellulose proceeded via disruption of hydrogen bonds between cellulose chains. The swelling behaviors of ultrafine OC mats were dependent on the type of swelling solution. In a physiological salt solution, their degree of swelling was approximately 230%.
Son
Won Keun
WK
Research Institute of Advanced Materials, Chungnam National University, Daejeon 305-764, South Korea.
Youk
Ji Ho
JH
Park
Won Ho
WH
D000042:Absorption; D001672:Biocompatible Materials / Q000138:chemical synthesis; D002482:Cellulose / Q000138:chemical synthesis*; D006860:Hydrogen Bonding; D008567:Membranes, Artificial; D010084:Oxidation-Reduction; D014867:Water
D001672:Biocompatible Materials; D008567:Membranes, Artificial; D014867:Water; D002482:Cellulose