IHydroxypropylmethylcellulose (HPMC) iyisengezo esibalulekile esakhiweni sodaka, esidlala indima ebalulekile ekwenzeni ngcono ukusebenza kodaka. Njengempahla engenabo ubuthi, engangcolisi futhi eyimvelo, i-HPMC kancane kancane ithathe indawo yezithako zendabuko ezifana nesitashi ether ne-lignin ether embonini yezokwakha. Lesi sihloko sizoxoxa ngendima ebalulekile ye-HPMC odakeni kusuka ezicini ezintathu zokugcina amanzi, ukusebenza nokubumbana.
I-HPMC ingathuthukisa ngempumelelo ukugcinwa kwamanzi kodaka. Ukugcinwa kwamanzi odaka kubhekisela emandleni odaka ukugcina okuqukethwe kwawo kwamanzi ngesikhathi sokwakha. Ukugcinwa kwamanzi kodaka kuhlobene nokusebenza kukasimende kanye nezithasiselo ezisetshenziswa odakeni. Uma udaka lulahlekelwa amanzi amaningi, luzokwenza ukuthi udaka lome, okuzonciphisa kakhulu ukusebenza kwalo nokunamathela, futhi kubangele izinkinga ezifana nokuqhekeka komkhiqizo ophelile.
I-HPMC iqukethe i-hydroxypropyl kanye namaqembu e-methyl futhi ine-hydrophilic kakhulu. Ingenza ungqimba lwefilimu engaphezulu kwezinhlayiya zodaka ukuze kuvinjelwe ukuhwamuka kwamanzi futhi kuthuthukise ngempumelelo ukugcinwa kwamanzi odaka. Ngesikhathi esifanayo, i-HPMC ingaphinde ihlangane nama-molecule amanzi ngokusebenzisa izibopho ze-hydrogen, okwenza kube nzima kakhulu ukuthi ama-molecule amanzi ahlukane nezinhlayiya zodaka. Ngakho-ke, i-HPMC inomthelela omkhulu ekwenzeni ngcono ukugcinwa kwamanzi odaka.
I-HPMC ingaphinde ithuthukise ukusebenza kodaka. Ukusebenza kodaka kubhekiselwa ekusebenziseni kalula udaka ngesikhathi sokwakha. Uma udaka lusebenza kangcono, kuba lula kubasebenzi bokwakha ukulawula ukuma nokuvumelana kodaka ngesikhathi sokwakha. Ukusebenza kahle kodaka kunganciphisa nenani lamaphakethe omoya emkhiqizo oqediwe, okwenza isakhiwo sibe minyene futhi siqine.
I-HPMC ingathuthukisa ngempumelelo ukusebenza kodaka ngokunciphisa i-viscosity yodaka. Isisindo samangqamuzana e-HPMC siphezulu uma kuqhathaniswa, futhi kulula ukwenza amabhondi e-hydrogen ngama-molecule amanzi, okuholela ekubonakaleni okuphezulu. Kodwa-ke, i-HPMC ingabola ibe yizinhlayiya ezincane ngaphansi kwesenzo se-shear force, ukunciphisa i-viscosity yodaka. Ngakho-ke, lapho abasebenzi bezokwakha bebamba udaka, izinhlayiya ze-HPMC zizophulwa, kwenze udaka lube uketshezi futhi lube lula ukulwakha. Ngaphezu kwalokho, amaqembu e-hydrophilic ku-HPMC angakha futhi ifilimu engaphezulu phezu kwezinhlayiya zodaka, anciphise ukungqubuzana kwezinhlayiyana phakathi kwezinhlayiya zodaka, futhi athuthukise ukusebenza kodaka.
I-HPMC ingathuthukisa ukunamathela kodaka. I-adhesion of mortar ibhekisela emandleni ayo okunamathela ngokuqinile ebusweni be-substrate. Ukunamathela okuhle kungakha ukuxhumana okuqinile nokuthembekile phakathi kodaka ne-substrate, okuqinisekisa ukuqina komkhiqizo ophelile. Ngaphezu kwalokho, ukunamathela okuhle kungenza futhi ubuso bomkhiqizo oqediwe bushelelezi futhi bube buhle kakhulu.
I-HPMC ingathuthukisa ukunamathela kodaka ngezindlela eziningi. Okokuqala, i-HPMC ingenza ifilimu engaphezulu endaweni engaphansi ngemuva kokwakhiwa kodaka, okunganciphisa ngempumelelo ukungezwani okungaphezulu kwe-substrate futhi kwenze kube lula ukuthi udaka lunamathele ku-substrate. Okwesibili, izinhlayiya ze-HPMC nazo zingakha isakhiwo senethiwekhi ebusweni be-substrate, zandise indawo yokuxhumana phakathi kodaka kanye ne-substrate, futhi zithuthukise ngokuqhubekayo ukunamathela kodaka. Ngaphezu kwalokho, amaqembu e-hydrophilic ku-HPMC angahlanganiswa nama-molecule wamanzi, angandisa ngokuphumelelayo isilinganiso samanzi-samente osimende futhi athuthukise amandla okubumbana odaka.
Ukusetshenziswa kwe-HPMC odakeni kunezinzuzo eziningi njengokugcinwa kwamanzi, ukusebenza kahle, nokunamathela okuthuthukisiwe. Lezi zinzuzo azizuzi nje kuphela izisebenzi zokwakha, kodwa futhi zinomthelela omuhle kukhwalithi yonke yomkhiqizo ophelile. Ngokuthuthuka kwesayensi nobuchwepheshe, kukholakala ukuthi i-HPMC izodlala indima ebaluleke kakhulu embonini yezokwakha futhi ihlinzeke ngezinto ezisebenza kahle neziphephile embonini yezokwakha.
Isikhathi sokuthumela: Sep-01-2023