Sodium stearate

 

Sodium stearate (IUPAC: Sodium Octadecanoate) o bu sodium salt nke stearic acid. Ana ahu ya nu di obula nke solid deodorant, rubber, latex plants na inks. obukwa mpara nke ufodu nri additive na food flavor.

Ojiji

Ihe e ji mara ncha, sodium stearate nwere akụkụ hydrophilic na hydrophobic, carboxylate na ogologo hydrocarbon, n'otu n'otu. Akụkụ abụọ a dị iche iche na-akpata mmepụta nke micelles, nke na-egosi isi hydrophilic n'èzí na ọdụ hydrophobic (hydrocarbon) ha n'ime, na-enye gburugburu lipophilic maka hydrophobian compounds. Akụkụ ọdụ ahụ na-agbaze abụba (ma ọ bụ) unyi ma mepụta micelle. A na-ejikwa ya eme ihe na ụlọ ọrụ ọgwụ dị ka surfactant iji nyere aka na solubility nke hydrophobic compounds na mmepụta nke ụfụfụ ọnụ dị iche iche.

Mmepụta

A na-emepụta sodium stearate dị ka isi ihe na-emepụta ncha mgbe a na-emepụta mmanụ na abụba. Pasentị nke sodium stearate na-adabere na abụba ndị mejupụtara ya. Tallow dị elu na stearic acid (dị ka triglyceride), ebe ọtụtụ abụba nwere naanị pasent ole na ole. Usoro e chepụtara maka mmepụta nke sodium stearate site na stearin (triglyceride nke stearic acid) na-esonụ:

₂ (C₁₈) ₃ + 3 NaOH → C3H₅ (OH) 3 + 3 C18H₃₅ O2Na

Enwere ike ime sodium stearate dị ọcha site na iji sodium hydroxide mee ka stearic acid ghara ịdị ọcha.

₂₁₇+NaOH→C17H₃₅+H2O

Njikọ mpụga

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