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- W2074375345 abstract "The hydrophile-lipophile balance of nonionic surfactants changes from hydrophilic to lipophilic with the rise in temperature and is considered to be just balanced in a temperature range at which a lamellar liquid crystalline phase forms in the surfactant-water system. The mid-temperature of that range is called the liquid crystal temperature, TLC. It was found that the following relation between the HLB numbers of nonionic surfactants and the LC temperature in an aqueous system is valid: TLC = kH2O(∑NHLB(i)W(i) − NH2O) where kH2O = 17°C/HLB unit, NH2O = 7.4 HLB unit, NHLB(i) and W(i) are the HLB number and the weight fraction of ith surfactant in total surfactants. This relationship is similar to that between the HLB number and the HLB temperature in a water/nonionic surfactant/oil system. Since the surfactant ratio to produce a lamellar liquid crystalline phase in a diluted region is almost independent of temperature in an ionicnonionic surfactant system, the condition to produce a lamellar liquid crystal was found at 30°C to be ∑NHLB(i)W(i) = 9.2. This relation is equivalent to the above equation and is valid for an ionic-nonionic surfactant aqueous system." @default.
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- W2074375345 date "1986-12-01" @default.
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- W2074375345 title "Correlation between the formation of a lamellar liquid crystalline phase and the hydrophile-lipophile balance (HLB) of surfactants" @default.
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- W2074375345 doi "https://doi.org/10.1016/0021-9797(86)90423-6" @default.
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