I-Hydroxypropylmethylcellulose (HPMC) iyisithako esibalulekile ku-mortar, edlala indima ebalulekile ekuthuthukiseni ukusebenza kwe-mortar. Njengento engenabuthi, engangcolisi futhi enobungani nemvelo, i-HPMC iye yathatha indawo kancane kancane yezithako zendabuko ezifana ne-starch ether kanye ne-lignin ether embonini yokwakha. Lesi sihloko sizoxoxa ngendima ebalulekile ye-HPMC ku-mortar kusukela ezicini ezintathu zokugcina amanzi, ukusebenza kahle kanye nokuhlangana.
I-HPMC ingathuthukisa ngempumelelo ukugcinwa kwamanzi kwesimende. Ukugcinwa kwamanzi kwesimende kubhekisela ekhonweni lesimende lokugcina okuqukethwe kwamanzi ngesikhathi sokwakhiwa. Ukugcinwa kwamanzi kwesimende kuhlobene nokusebenza kwesimende kanye nezithasiselo ezisetshenziswa kusimende. Uma isimende silahlekelwa amanzi amaningi, sizobangela ukuthi isimende some, okuzonciphisa kakhulu ukusebenza kwaso kanye nokunamathela kwaso, futhi kubangele nezinkinga ezifana nokuqhekeka komkhiqizo oqediwe.
I-HPMC iqukethe amaqembu e-hydroxypropyl kanye ne-methyl futhi ithanda kakhulu amanzi. Ingakha ungqimba lwefilimu ebusweni bezinhlayiya ze-mortar ukuvimbela ukuhwamuka kwamanzi futhi ithuthukise ngempumelelo ukugcinwa kwamanzi kwe-mortar. Ngesikhathi esifanayo, i-HPMC ingahlangana nama-molecule amanzi ngokusebenzisa izibopho ze-hydrogen, okwenza kube nzima kakhulu ngama-molecule amanzi ukuhlukanisa nezinhlayiya ze-mortar. Ngakho-ke, i-HPMC inomthelela omkhulu ekuthuthukiseni ukugcinwa kwamanzi kwe-mortar.
I-HPMC ingathuthukisa nokusebenza kahle kwe-mortar. Ukusebenza kahle kwe-mortar kubhekisela ekutheni i-mortar ingaphathwa futhi ibunjwe kalula ngesikhathi sokwakha. Uma ukusebenza kahle kwe-mortar, kuba lula ngabasebenzi bokwakha ukulawula ukuma nokuvumelana kwe-mortar ngesikhathi senqubo yokwakha. Ukusebenza kahle kwe-mortar kunganciphisa nenani lama-air pockets kumkhiqizo oqediwe, okwenza isakhiwo sibe sikhulu futhi siqine.
I-HPMC ingathuthukisa ngempumelelo ukusebenza kahle kwe-mortar ngokunciphisa i-viscosity ye-mortar. Isisindo sama-molecule se-HPMC siphezulu kakhulu, futhi kulula ukwakha izibopho ze-hydrogen nama-molecule amanzi, okuholela ekuqineni okuphezulu. Kodwa-ke, i-HPMC ingahlukaniswa ibe yizinhlayiya ezincane ngaphansi kwesenzo samandla okusika, kunciphisa i-viscosity ye-mortar. Ngakho-ke, lapho abasebenzi bokwakha bephatha i-mortar, izinhlayiya ze-HPMC zizohlukaniswa, okwenza i-mortar ibe uketshezi oluningi futhi kube lula ukuyakha. Ngaphezu kwalokho, amaqembu athanda amanzi ku-HPMC angakha nefilimu engaphezulu ebusweni bezinhlayiya ze-mortar, anciphise ukungqubuzana phakathi kwezinhlayiya ze-mortar, futhi athuthukise ukusebenza kahle kwe-mortar.
I-HPMC ingathuthukisa ukunamathela kwe-mortar. Ukunamathela kwe-mortar kubhekisela ekhonweni layo lokunamathela ngokuqinile ebusweni be-substrate. Ukunamathela okuhle kungakha uxhumano oluqinile noluthembekile phakathi kwe-mortar ne-substrate, okuqinisekisa ukuqina komkhiqizo oqediwe. Ngaphezu kwalokho, ukunamathela okuhle kungenza ubuso bomkhiqizo oqediwe bube bushelelezi futhi bube buhle kakhudlwana.
I-HPMC ingathuthukisa ukunamathela kwe-mortar ngezindlela eziningana. Okokuqala, i-HPMC ingakha ifilimu ebusweni be-substrate ngemva kokwakhiwa kwe-mortar, okunganciphisa ngempumelelo ukungezwani kobuso be-substrate futhi kwenze kube lula ukuthi i-mortar inamathele kwi-substrate. Okwesibili, izinhlayiya ze-HPMC zingakha nesakhiwo senethiwekhi ebusweni be-substrate, zandise indawo yokuxhumana phakathi kwe-mortar ne-substrate, futhi zithuthukise ukunamathela kwe-mortar. Ngaphezu kwalokho, amaqembu athanda amanzi ku-HPMC angahlanganiswa nama-molecule amanzi, angakhuphula ngempumelelo isilinganiso samanzi ne-cement se-mortar futhi athuthukise amandla ahlangene e-mortar.
Ukusetshenziswa kwe-HPMC ku-mortar kunezinzuzo eziningi njengokugcinwa kwamanzi, ukusebenza kahle, kanye nokunamathela okuthuthukisiwe. Lezi zinzuzo azizuzisi nje kuphela izisebenzi zokwakha, kodwa futhi zinomthelela omuhle kwikhwalithi iyonke yomkhiqizo oqediwe. Ngokuthuthuka kwesayensi nobuchwepheshe, kukholelwa ukuthi i-HPMC izodlala indima ebaluleke kakhulu embonini yokwakha futhi ihlinzeke ngezinto ezisebenzayo neziphephile embonini yokwakha.
Isikhathi sokuthunyelwe: Septhemba-01-2023