Ulwazi lokwazisa nge-hydroxypropyl methylcellulose HPMC

I-Hydroxypropyl methylcellulose (HPMC) yi-non-ionic cellulose ether eyenziwe nge-cellulose yendalo yepolymer ngokusebenzisa uthotho lweenkqubo zeekhemikhali. Zingumgubo omhlophe ongenavumba, ongenancasa kwaye ongenatyhefu ovuvukala ube yisisombululo se-colloidal esicacileyo okanye esinamafu kancinci emanzini abandayo. Ineempawu zokuqina, zokubopha, zokusasaza, zokuhlanganisa, zokwenza ifilimu, zokumisela, zokufaka i-gelling, zokufaka i-gelling, ezisebenza kumphezulu, zokugcina umswakama kunye nezokukhusela i-colloid. I-Hydroxypropyl methyl cellulose kunye ne-methyl cellulose zingasetyenziswa kwizixhobo zokwakha, kushishino lwepeyinti, kwi-resin yokwenziwa, kushishino lwe-ceramic, kumayeza, ekutyeni, kwilaphu, kwezolimo, kwi-daily chemical nakwezinye iishishini.

I-Hydroxypropyl Methyl Cellulose HPMC Chemical Equation

[C6H7O2(OH)3-mn(OCH3)m(OCH2CH(OH)CH3)n]x

Impembelelo yokugcina amanzi kunye nomgaqo we-hydroxypropyl methylcellulose HPMC

I-cellulose ether HPMC ikakhulu idlala indima yokugcina amanzi kunye nokuqina kwi-samente mortar kunye ne-gypsum-based slurry, kwaye inokuphucula ngempumelelo amandla adibeneyo kunye nokumelana nokuwa kwe-slurry.

Izinto ezifana nobushushu bomoya, ubushushu kunye nesantya soxinzelelo lomoya ziya kuchaphazela izinga lokuguquguquka kwamanzi kwi-samente mortar kunye neemveliso ezisekwe kwi-gypsum. Ke ngoko, ngamaxesha ahlukeneyo onyaka, kukho umahluko othile kwisiphumo sokugcina amanzi kwiimveliso ezinomlinganiselo ofanayo we-HPMC. Kwisakhiwo esithile, isiphumo sokugcina amanzi kwi-slurry sinokulungiswa ngokunyusa okanye ukunciphisa inani le-HPMC eyongeziweyo. Ukugcinwa kwamanzi kwi-methyl cellulose ether phantsi kweemeko zobushushu obuphezulu luphawu olubalulekileyo lokwahlula umgangatho we-methyl cellulose ether. Iimveliso ezibalaseleyo zochungechunge lwe-HPMC zinokusombulula ngempumelelo ingxaki yokugcina amanzi phantsi kobushushu obuphezulu. Kumaxesha obushushu obuphezulu, ngakumbi kwiindawo ezishushu nezomileyo kunye nokwakhiwa okuncinci kwicala elinelanga, i-HPMC esemgangathweni ophezulu iyafuneka ukuphucula ukugcinwa kwamanzi kwi-slurry. I-HPMC esemgangathweni ophezulu inokufana okuhle kakhulu. Amaqela ayo e-methoxy kunye ne-hydroxypropoxy asasazwa ngokulinganayo kwi-cellulose molecular chain, enokuphucula amandla ee-athomu ze-oxygen kwi-hydroxyl kunye ne-ether bonds ukuba zidibane namanzi ukuze zenze ii-hydrogen bonds. , ukuze amanzi akhululekileyo abe ngamanzi abotshelelweyo, ukuze kulawulwe ngempumelelo ukufuma kwamanzi okubangelwa yimozulu eshushu kakhulu, kwaye kufezekiswe ukugcinwa kwamanzi okuphezulu.

I-HPMC ye-cellulose ekumgangatho ophezulu inokusasazeka ngokulinganayo nangokufanelekileyo kwi-samente mortar kunye neemveliso ezisekwe kwi-gypsum, kwaye igoqe zonke iinxalenye eziqinileyo, kwaye yenze ifilimu yokumanzisa, ukufuma kwisiseko kukhululwa kancinci kancinci ixesha elide, kwaye iglue engaphiliyo. Impendulo yokumanzisa kwezinto ezihlanganisiweyo iya kuqinisekisa amandla okubopha kunye namandla okucinezela kwezinto. Ke ngoko, kulwakhiwo lwasehlotyeni olushushu kakhulu, ukuze kufezekiswe isiphumo sokugcina amanzi, kuyimfuneko ukongeza iimveliso ze-HPMC ezikumgangatho ophezulu ngobuninzi obaneleyo ngokwefomula, kungenjalo, kuya kubakho ukumanzisa okwaneleyo, amandla anciphileyo, ukuqhekeka, ukugoba kunye nokuchitheka okubangelwa kukoma kakhulu. iingxaki, kodwa kwanokwandisa ubunzima bokwakha babasebenzi. Njengoko ubushushu buhla, ubungakanani bamanzi e-HPMC ongezelelweyo bunokuncipha kancinci, kwaye isiphumo esifanayo sokugcina amanzi sinokufezekiswa.

Ukugcinwa kwamanzi kwemveliso ye-hydroxypropyl methylcellulose HPMC ngokwayo kudla ngokuchaphazeleka zezi zinto zilandelayo:

1. Ukufana kwe-cellulose ether HPMC

I-HPMC, i-methoxyl kunye ne-hydroxypropoxyl ezisabela ngokulinganayo zisasazwa ngokulinganayo, kwaye izinga lokugcina amanzi liphezulu.

2. Ubushushu bejeli yobushushu be-cellulose ether HPMC

Okukhona ubushushu bejeli yobushushu buphezulu, kokukhona izinga lokugcina amanzi liphezulu; kungenjalo, izinga lokugcina amanzi liphantsi.

3. I-Ether yeCellulose yeHPMC

Xa i-viscosity ye-HPMC isanda, izinga lokugcina amanzi nalo liyakhula; xa i-viscosity ifikelela kwinqanaba elithile, ukunyuka kwenqanaba lokugcina amanzi kudla ngokuba buthathaka.

4. Ubungakanani bokongeza kwe-cellulose ether HPMC

Okukhona inani elikhulu le-cellulose ether HPMC yongezwa, kokukhona izinga lokugcina amanzi liphezulu kwaye kokukhona isiphumo sokugcina amanzi singcono. Kuluhlu lokongeza lwe-0.25-0.6%, izinga lokugcina amanzi liyanda ngokukhawuleza ngokonyuka kwenani lokongeza; xa inani lokongeza lisanda ngakumbi, umkhwa wokwanda kwenani lokugcina amanzi uyehla.