Electrospinning of ultrafine cellulose acetate-egg albumen blend fibers = การขึ้นรูปเส้นใยนาโนจากเซลลูโลสอะซิเตทและไข่ขาวด้วยวิธีการปั่นด้วยไฟฟ้าสถิต

ผู้เขียน

มนัสชื่น ปฐพีจำรัสวงศ์

เอกสารที่มา

วิทยานิพนธ์. (2007) 61 หน้า

หัวข้อ:

บทคัดย่อ

This research was, for the first time, conducted to fabricate edible nanofibrous membrane from cellulose actate (CA) and egg albumen (EA) blend using electrospinning technique. The main objective of the work was to study the effects of solution properties including viscosity,surface tension and electrical conductivity on nanofiber formation and to investigate a potentiality in electrospinning of the blend. In this work, the blend nanofibers were electrospun from blend solutions of CA in 85 percent acetic acid and EA in 50 percent formic acid. The percentage ratio of CA to EA was varied form 100:0 to 91:9, 77:23, 68:33 and 0:100. The effect of the blending ratio on the solution properties and morphology of the electrospun particles (i.e., droplets, beads, beaded fibers or fibers) as examined by SEM were studied. In the case of the blend, the results showed that low entanglement with high surace tension properties attributed to EA component was the major cause of the failure of fiber formation. However, addition of both CA and surfactant,namely,Tween 40(~10- 23% w/v) could promote fiber formation. Addition of CA enhanced polymer entanglement in terms of a higher solution viscosity whilst addition of Tween 40 slightly lowered the electrical conductivity and substantially reduced the surface tension of the blends. Average diameters of the blend fibers were 265±48, 242±32, 384±54 and 410±38 nm corresponding to the percentage ratios of CA:EA of 100:0, 91:9, 77:23, and 67:33, respectively. SEM micrographs showed that the blend nanofibers became more continuous and had smoother surface as EA ratio increased from 9 to 33 percent. The components of the electrospun fibers, as examined by FTIR and TGA, indicated that the blend fibers were composed of both CA and EA. TGA data analysis also revealed that the constituent ration of EA in the electrospun blend fibers was higher than that of the blend solutions