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Ho tsitsa ha pH ea hydroxyethylcellulose ke eng?

Ho tsitsa ha pH ea hydroxyethylcellulose ke eng?

Hydroxyethylcellulose (HEC) ke polima e qhibilihang ka metsing e sebelisoang haholo lits'ebetsong tse fapaneng tse kang likhomaretsi, lira, le lihlahisoa tsa tlhokomelo ea motho. Ho tsitsa ha pH ea HEC ho itšetlehile ka lintlha tse 'maloa, ho kenyelletsa le kereiti e khethehileng ea HEC, mofuta oa pH oa kopo, le nako ea ho pepeseha tikolohong ea pH.

HEC ka tloaelo e tsitsitse ka har'a pH ea 2-12, e koahelang mefuta e mengata ea acidic ho maemo a alkaline. Leha ho le joalo, ho pepeseha ha nako e telele ho maemo a pH a feteletseng ho ka etsa hore HEC e fokotsehe, e leng se fellang ka tahlehelo ea thepa ea eona e teteaneng le e tsitsitseng.

Ka litekanyetso tsa acidic pH, ka tlase ho pH ea 2, HEC e ka kena hydrolysis, e lebisang ho fokotseha ha boima ba molek'hule le ho fokotseha ha viscosity. Ka litekanyetso tse phahameng haholo tsa alkaline pH, ka holimo ho pH 12, HEC e ka kena alkaline hydrolysis, e lebisang tahlehelong ea thepa ea eona e teteaneng le e tsitsitseng.

Ho tsitsa ha pH ea HEC ho ka boela ha angoa ke ho ba teng ha lik'hemik'hale tse ling ha ho etsoa, ​​​​tse kang matsoai kapa li-surfactants, tse ka amang pH le matla a ionic a tharollo. Maemong a mang, ho eketsa acid kapa setsi ho ka 'na ha hlokahala ho fetola pH le ho boloka botsitso ba tharollo ea HEC.

Ka kakaretso, HEC ka kakaretso e tsitsitse ka har'a mefuta e mengata ea pH, empa ke habohlokoa ho nahana ka maemo a khethehileng a kopo le ho etsoa ho etsa bonnete ba hore HEC e boloka thepa ea eona e lakatsehang ka nako.


Nako ea poso: Mar-08-2023
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