Hydroxyethylcellulose (HEC) wani nau'in polymer ne wanda ba na ionic ruwa mai narkewa wanda aka yadu ana amfani dashi a cikin sutura, kayan kwalliya, kayan gini, magani da sauran masana'antu. Babban aikinsa shine a matsayin mai kauri, wakili mai dakatarwa, mai samar da fim da stabilizer, wanda zai iya inganta haɓakar rheological na samfur. HEC yana da kyau solubility, thickening, film-forming da kuma dacewa, don haka yana da fifiko a yawancin fannoni. Duk da haka, game da kwanciyar hankali na HEC da aikinsa a cikin yanayi daban-daban na pH, yana da mahimmancin mahimmanci wanda dole ne a yi la'akari da shi a aikace-aikace masu amfani.
Dangane da fahimtar pH, hydroxyethylcellulose, a matsayin polymer wanda ba na ionic ba, yana da ƙarancin kulawa ga canje-canjen pH. Wannan ya bambanta da wasu masu kauri na ionic (irin su carboxymethylcellulose ko wasu polymers na acrylic), waɗanda ke ƙunshe da ƙungiyoyin ionic a cikin tsarin ƙwayoyin su kuma suna da saurin rabuwa ko ionization a cikin yanayin acidic ko alkaline. , don haka yana tasiri tasirin thickening da rheological Properties na maganin. Saboda HEC ba ta ƙunshe da caji ba, tasirin sa mai kauri da kaddarorin solubility sun kasance da gaske barga akan kewayon pH mai faɗi (yawanci pH 3 zuwa pH 11). Wannan fasalin yana ba da damar HEC don daidaitawa da tsarin ƙira iri-iri kuma yana iya yin tasiri mai kyau mai ƙarfi a ƙarƙashin acidic, tsaka tsaki ko raunin alkaline.
Ko da yake HEC yana da kwanciyar hankali mai kyau a ƙarƙashin mafi yawan yanayin pH, aikinta na iya tasiri a matsanancin yanayin pH, irin su matsanancin acidic ko yanayin alkaline. Alal misali, a ƙarƙashin yanayin acidic sosai (pH <3), za a iya rage solubility na HEC kuma tasirin daɗaɗɗen ƙila ba zai zama mai mahimmanci ba kamar a cikin tsaka-tsaki ko dan kadan acidic yanayi. Wannan shi ne saboda yawan adadin hydrogen ion maida hankali zai shafi daidaitaccen sarkar kwayoyin HEC, yana rage ikonsa na yadawa da kumbura a cikin ruwa. Hakanan, a ƙarƙashin yanayin alkaline sosai (pH> 11), HEC na iya fuskantar ɓarna na ɓangarori ko gyare-gyaren sinadarai, yana shafar tasirin sa.
Baya ga solubility da sakamako mai kauri, pH na iya shafar daidaituwar HEC tare da sauran abubuwan ƙira. Ƙarƙashin mahalli na pH daban-daban, wasu sinadarai masu aiki na iya ionize ko rabuwa, ta haka canza mu'amalarsu da HEC. Misali, a karkashin yanayin acidic, wasu ions karfe ko kayan aikin cationic na iya haifar da hadaddun tare da HEC, haifar da tasirin sa mai kauri don raunana ko hazo. Sabili da haka, a cikin ƙirar ƙira, hulɗar tsakanin HEC da sauran sinadaran a ƙarƙashin yanayin pH daban-daban yana buƙatar la'akari don tabbatar da kwanciyar hankali da aiki na dukan tsarin.
Kodayake HEC kanta ba ta da hankali ga canje-canjen pH, ƙimar rushewarta da tsarin rushewar pH na iya shafar shi. HEC yawanci yana narkewa da sauri a ƙarƙashin tsaka tsaki ko ɗan acidic yanayi, yayin da a ƙarƙashin matsanancin acidic ko alkaline tsarin narkarwar na iya zama a hankali. Sabili da haka, lokacin shirya mafita, ana bada shawara sau da yawa don ƙara HEC zuwa wani bayani mai tsaka-tsaki ko kusa da ruwa don tabbatar da cewa ya narke da sauri kuma a ko'ina.
Hydroxyethylcellulose (HEC), a matsayin ba-ionic polymer, ba shi da ƙarancin kulawa ga pH kuma yana iya kula da tasirin kauri da kaddarorin solubility akan kewayon pH. Ayyukansa yana da kwanciyar hankali a cikin kewayon pH 3 zuwa pH 11, amma a cikin matsanancin yanayin acid da alkali, tasirin sa mai kauri da solubility na iya shafar. Sabili da haka, lokacin da ake amfani da HEC, kodayake a mafi yawan lokuta babu buƙatar kulawa da yawa ga canje-canjen pH, a ƙarƙashin matsanancin yanayi, ana buƙatar gwajin da ya dace da daidaitawa don tabbatar da kwanciyar hankali da aiki na tsarin.
Lokacin aikawa: Oktoba-22-2024