Basic research on adsorption and desorption of metal ions for silk

• Project/Area Number: 09660060
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: 蚕糸・昆虫利用学
• Research Institution: Koka women's junior college
• Principal Investigator: NAKAJIMA Tetsuo Koka women's junior college Faculty of sciences of living Professor, 生活学科, 教授 (70175496)
• Project Period (FY): 1997 – 1998
• Project Status: Completed (Fiscal Year 1998)
• Budget Amount: ¥1,100,000 (Direct Cost: ¥1,100,000); Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000); Fiscal Year 1997: ¥600,000 (Direct Cost: ¥600,000)
• Keywords: Silk Fiber / Metal ion / Adsorption / Desorption / Copper / Iron / Aluminum

Research Abstract

Adsorption and desorption of copper, iron and aluminum that used as mordant when silk was dyed by natural dye were examined. And, influence of the adsorbed metal on the dyeing properties of silk was examined.
The results of examinations, this confirms that adsorption of copper, iron and aluminum on silk fiber increased in process of treating time. And, copper and iron were adsorbed similar to maximum adsorption in first 5 minutes.
The desorption of copper and aluminum from silk fiber were more easy than that of iron in its early time. But the electric conductivity under desorption of iron from silk fiber increased by about ten times that of first time after standing undisturbed overnight.
And it was observed that copper adsorbed in silk fiber inhibited the adsorption of C.I.Acid Orange 7 on silk fiber.
After this, I would like to measure the maximum quantity of adsorbed metal to silk fiber. And, I hope to clear adsorbing characteristics of metal to silk fiber.