Effects of Some Surfactants as Stabilizers to Reduce the Phase Separation Rates of Blended Pastes for Warp Sizing
2002
Zhifeng Zhu, | Yaohua Li,
Reducing the phase-separation rates of starch/PVA blend pastes for warp sizing by adding a small amount of surfactant as a stabilizer is investigated. The effects of reducing the separation rates or raising the stability of the blended pastes are evaluated in terms of initial demixing time and volume percentage of phase separation. Surfactants such as sodium dodecylsulfate, sodium dodecylsulfonate, Tween 20, and Span 20 are individually evaluated. The type and amount of the surfactant strongly affect the phase-separation rates or the paste stability. Sodium dodecylsufate and sodium dodecylsulfonate effectively retard phase separation and enhance paste stability, whereas Tween 20 and Span 20 do not. Increasing the amount of sodium dodecylsulfate favorably reduces the separation rates. Moreover, the effects of starch content and PVA type on the separation are also investigated.
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