Kuyini ukuzinza kwe-pH kwe-hydroxyethylcellulose?

IHydroxyethylcellulose (HEC) iyi-polymer encibilika emanzini esetshenziswa kabanzi ezintweni ezahlukahlukene ezifana nokunamathiswa, okokunamathela, nemikhiqizo yokunakekela umuntu. Ukuzinza kwe-pH ye-HEC kuncike ezintweni ezimbalwa, okuhlanganisa ibanga elithile le-HEC, ububanzi be-pH yohlelo lokusebenza, kanye nobude besikhathi sokuchayeka endaweni ye-pH.

I-HEC ivamise ukuzinza ngaphakathi kwebanga le-pH lika-2-12, elihlanganisa izinhlobonhlobo zezimo ze-acidic kuya kwe-alkaline. Kodwa-ke, ukuchayeka isikhathi eside ezimeni ze-pH ezeqisayo kungabangela i-HEC ukuba ihlehlise, okuholela ekulahlekelweni kwezakhiwo zayo zokujiya nokuzinzisa.

Emazingeni e-pH ane-acidic, ngaphansi kwe-pH ye-2, i-HEC ingathola i-hydrolysis, okuholela ekwehleni kwesisindo samangqamuzana nokunciphisa i-viscosity. Emazingeni aphezulu we-pH ye-alkaline, ngaphezu kwe-pH 12, i-HEC ingangena kwi-alkaline hydrolysis, okuholela ekulahlekelweni kwezakhiwo zayo zokujiya nokuzinza.

Ukuzinza kwe-pH ye-HEC nakho kungathinteka ngokuba khona kwamanye amakhemikhali ekwakhiweni, njengosawoti noma ama-surfactants, angathinta i-pH namandla e-ionic esixazululo. Kwezinye izimo, ukwengeza i-asidi noma isisekelo kungase kudingeke ukulungisa i-pH nokugcina ukuzinza kwesisombululo se-HEC.

Sekukonke, i-HEC ngokuvamile izinzile phakathi kwebanga elibanzi le-pH, kodwa kubalulekile ukucabangela izimo ezithile zokusetshenziswa nokubunjwa ukuze kuqinisekiswe ukuthi i-HEC igcina izakhiwo zayo ezifunwayo ngokuhamba kwesikhathi.