:Removal of Oily Soils (Part 3)

概要

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The non-phosphate liquid detergents are generally combination of nonionic and anionic surfactants. The effects of both single and mixed solution of nonionic and anionicsurfactants on the removal of oily soils from fabrics were studied.<BR>Four kinds of polyoxyethylene alkyl ether (HLB 11.4-14.2) and polyoxyethylene dodecyl ether sulfate (E.O. 3) were used as nonionicand anionic surfactants, respectively. Polyester and cotton fabrics were soiled either with palmitic acid, oleic acid, or triolein, and also with a mixture of palmitic acid and triolein from benzene solution. Amounts of the oily soils adhering to the fabrics were determined by Gas-Liquid Chromatography (GLC) method after the extraction with ethyl ether.<BR>Palmitic and oleic acid soils were removed more effectively in the solution of the nonionics with higher HLB value, whereas the nonionics with 12-13 HLB value were most effective for triolein soil. The addition of anionic surfactant to the nonionics having lower HLB value increases the removal of oleic acid but slightly decreases triolein soil removal.<BR>Palmitic and oleic acid soils were removed more easily from polyester than cotton fabric, on the other hand, triolein was removed better from cotton fabric. The effect of the HLB value of nonionics on the removal of a mixture soil of palmitic acid and triolein was observed on polyester fabric but little on cotton.
一般社団法人日本家政学会の論文