I-Hydroxypropyl methyl cellulose HPMC yi-ether ye-cellulose engeyiyo i-ionic eyenziwe kwi-cellulose yendalo ye-polymer yendalo ngoluhlu lwe-chemical processing. Ziyimpuphu emhlophe engenavumba, engenancasa kwaye ayinayo ityhefu edumba ibe sisisombululo esicacileyo okanye esine-turbid colloidal kumanzi abandayo. Ineempawu zokuqina, ukudibanisa, ukusabalalisa, i-emulsification, ukubunjwa kwefilimu, ukumiswa, i-adsorption, i-gelation, umsebenzi ophezulu, ukugcinwa komswakama kunye ne-colloid yokukhusela. I-Hydroxypropyl methylcellulose ingasetyenziselwa izinto zokwakha, i-coating industry, i-synthetic resin, i-ceramic industry, amayeza, ukutya, i-textile, ezolimo, imboni yemichiza yemihla ngemihla kunye namanye amashishini.
Umsebenzi wokugcinwa kwamanzi kunye nomgaqo-siseko: i-cellulose ether HPMC idlala indima enkulu yokugcina amanzi kunye nokuqina kwi-cement mortar kunye ne-gypsum-based slurry, enokuphucula ngokufanelekileyo amandla okudibanisa kunye nokuxhatshazwa kwe-sag ye-slurry. Izinto ezifana nobushushu bomoya, ubushushu kunye nesantya soxinzelelo lomoya ziya kuchaphazela izinga lokuguquguquka kwamanzi kudaka lwesamente kunye neemveliso ezisekwe kwigypsum. Ke ngoko, ngamaxesha ahlukeneyo onyaka, kukho iiyantlukwano kwisiphumo sokugcinwa kwamanzi kwisixa esifanayo seemveliso zeHPMC. Kulwakhiwo oluthile, umphumo wokugcinwa kwamanzi we-slurry unokulungiswa ngokunyuka okanye ukunciphisa inani le-HPMC elongezelelweyo.
Ukugcinwa kwamanzi kwe-methyl cellulose ether phantsi kweemeko eziphezulu zeqondo lokushisa luphawu olubalulekileyo lokuhlukanisa umgangatho we-methyl cellulose ether. Iimveliso ezigqwesileyo ze-HPMC zinokusombulula ngempumelelo ingxaki yokugcinwa kwamanzi kumaqondo obushushu aphezulu. Ngamaxesha obushushu obuphezulu, ngakumbi kwiindawo ezishushu nezomileyo kunye nolwakhiwo olubhityileyo kwicala elinelanga, i-HPMC ekumgangatho ophezulu iyafuneka ukuze kuphuculwe ukugcinwa kwamanzi kwi-slurry.
Umgangatho ophezulu we-HPMC unokufana okuhle kakhulu. Amaqela ayo e-methoxy kunye ne-hydroxypropoxy asasazwa ngokulinganayo kunye ne-cellulose molecular chain, enokuphucula amandla e-athomu ze-oksijini kwi-hydroxyl kunye ne-ether bonds ukudibanisa namanzi ukwenza iibhondi ze-hydrogen. , Ukuze amanzi akhululekile abe ngamanzi abophekileyo, ngaloo ndlela alawule ngokufanelekileyo ukukhuphuka kwamanzi okubangelwa yimozulu yokushisa okuphezulu, kunye nokuphumeza ukugcinwa kwamanzi aphezulu.
Umgangatho ophezulu we-cellulose HPMC unokuthi usasazwe ngokufanayo kwaye ngokufanelekileyo kwi-samente yodaka kunye neemveliso ezisekelwe kwi-gypsum, kwaye zibophe zonke iinqununu eziqinileyo, kwaye zenze umaleko wefilimu yokumanzisa. Amanzi akwisiseko akhululwa ngokuthe ngcembe kwixesha elide. Izinto eziphathekayo zihamba nge-hydration reaction, ukwenzela ukuba kuqinisekiswe amandla okubambisana kunye namandla okuxinzelela kwezinto. Ke ngoko, kulwakhiwo oluphezulu lwasehlotyeni, ukuze kufezekiswe umphumo wokugcinwa kwamanzi, iimveliso ze-HPMC ezikumgangatho ophezulu kufuneka zongezwe ngobungakanani obaneleyo ngokwefomula, kungenjalo, ukungonelanga kwe-hydration, ukunciphisa amandla, ukuqhekeka, ukugoba kunye nokuwa. iya kwenzeka ngenxa yokomisa kakhulu. Iingxaki, kodwa zandisa ubunzima babasebenzi bokwakha. Njengoko iqondo lokushisa liyancipha, inani le-HPMC elongezelelweyo lingancitshiswa ngokuthe ngcembe, kwaye umphumo ofanayo wokugcinwa kwamanzi unokufumaneka.
Ukugcinwa kwamanzi kwe-HPMC kuchatshazelwa zezi zinto zilandelayo:
1. I-Homogeneity ye-cellulose ether HPMC
Kwi-HPMC ephendule ngokulinganayo, amaqela e-methoxy kunye ne-hydroxypropoxy asasazwa ngokulinganayo, kwaye izinga lokugcinwa kwamanzi liphezulu.
2. Ubushushu bejeli ye-Thermal ye-cellulose ether HPMC
Ubushushu be-Thermal gel buphezulu, izinga lokugcinwa kwamanzi liphezulu; ngokuchaseneyo, izinga lokugcinwa kwamanzi liphantsi.
3. I-Viscosity ye-cellulose ether HPMC
Xa i-viscosity ye-HPMC inyuka, izinga lokugcinwa kwamanzi liyenyuka; xa i-viscosity ifikelela kwinqanaba elithile, ukunyuka kwesantya sokugcinwa kwamanzi kudla ukuba kube flat.
4. Ukongezwa kwe-cellulose ether HPMC
Okukhona ubuninzi be-cellulose ether HPMC eyongeziweyo, iphezulu izinga lokugcinwa kwamanzi kwaye ngcono isiphumo sokugcina amanzi. Kuluhlu lwe-0.25-0.6% yokongezwa, izinga lokugcinwa kwamanzi landa ngokukhawuleza ngokunyuka kwenani elongezelelweyo; xa isixa-mali esongeziweyo sinyuka ngakumbi, indlela eyandayo yokugcinwa kwamanzi iyancipha.
Ixesha lokuposa: Dec-16-2021