Yintoni ukuzinza kwe-pH ye-hydroxyethylcellulose?

IHydroxyethylcellulose (HEC) yipolymer enyibilikayo emanzini esetyenziswa ngokubanzi kwizicelo ezahlukeneyo ezifana nokuncamathelisa, iingubo, kunye neemveliso zokhathalelo lomntu. Ukuzinza kwe-pH ye-HEC kuxhomekeke kwizinto ezininzi, kubandakanywa ibakala elithile le-HEC, uluhlu lwe-pH yesicelo, kunye nobude bexesha lokuvezwa kwimeko ye-pH.

I-HEC ngokuqhelekileyo izinzile ngaphakathi koluhlu lwe-pH lwe-2-12, olubandakanya uluhlu olubanzi lwe-acidic kwiimeko ze-alkaline. Nangona kunjalo, ukuvezwa kwexesha elide kwiimeko ze-pH ezigqithisileyo kunokubangela ukuba i-HEC ithobe, okukhokelela ekulahlekelweni kweempawu zayo zokujiya kunye nokuzinzisa.

Kwimilinganiselo ye-pH ye-acidic, ngaphantsi kwe-pH ye-2, i-HEC inokungena kwi-hydrolysis, ekhokelela ekunciphiseni ubunzima be-molecular kunye nokunciphisa i-viscosity. Kwixabiso eliphezulu kakhulu le-alkaline pH, ngaphezu kwe-pH 12, i-HEC inokungena kwi-alkaline hydrolysis, ekhokelela ekulahlekelweni kweempawu zayo zokuxinana kunye nokuzinzisa.

Ukuzinza kwe-pH ye-HEC nako kunokuchaphazeleka kubukho bezinye iikhemikhali ekuqulunqweni, ezifana neetyuwa okanye i-surfactants, ezinokuchaphazela i-pH kunye namandla e-ionic yesisombululo. Kwezinye iimeko, ukongeza i-asidi okanye isiseko kunokufuneka ukulungelelanisa i-pH kunye nokugcina ukuzinza kwesisombululo se-HEC.

Ngokubanzi, i-HEC izinzile ngokubanzi phakathi koluhlu olubanzi lwe-pH, kodwa kubalulekile ukuqwalasela isicelo esithile kunye neemeko zokuqulunqa ukuqinisekisa ukuba i-HEC igcina iipropati ezifunwayo ekuhambeni kwexesha.