Indima kunye nomgaqo wokugcinwa kwamanzi we-hydroxypropyl methylcellulose HPMC

I-Hydroxypropyl methylcellulose (HPMC) yi-ether ye-cellulose engeyiyo ionic eyenziwe kwi-cellulose yezinto ze-polymer yendalo ngokusebenzisa uchungechunge lweenkqubo zemichiza. Azinavumba, azinancasa kwaye zingumgubo omhlophe ongenatyhefu othi udumbe ube sisinyibiliko esicacileyo okanye esinamafu kancinane kwi-colloidal kumanzi abandayo. Inokuqina, ukubopha, ukusabalalisa, i-emulsifying, ifilimu-ifom, ukumisa, i-adsorbing, i-gelling, i-surface esebenzayo, igcina umswakama kunye neempawu ze-colloid ezikhuselayo. I-Hydroxypropyl methylcellulose kunye ne-methylcellulose ingasetyenziselwa kwizinto zokwakha, imboni yepeyinti, i-resin yokwenziwa, i-ceramic industry, iyeza, ukutya, i-textile, ezolimo, iikhemikhali zemihla ngemihla kunye namanye amashishini.

Hydroxypropyl methylcellulose HPMC chemical equation:
[C6H7O2(OH)3-mn(OCH3)m(OCH2CH(OH)CH3)n]x

Isiphumo sokugcina amanzi kunye nomgaqo we-hydroxypropyl methylcellulose HPMC:
Iselulosi ether HPMCubukhulu becala idlala indima yokugcina amanzi kunye nokujiya kwi-samente yodaka kunye ne-gypsum-based slurry, kwaye inokuphucula ngokufanelekileyo amandla adibeneyo kunye nokuxhathisa i-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, kukho umahluko kwisiphumo sokugcinwa kwamanzi kwiimveliso ezinobungakanani obufanayo be-HPMC bongeziweyo. 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 phantsi kobushushu obuphezulu. 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-methoxyl kunye ne-hydroxypropoxyl asasazwa ngokulinganayo kunye ne-cellulose molecular chain, enokuphucula amandla e-athomu ze-oksijini kwi-hydroxyl kunye ne-ether bonds ukudibanisa namanzi ukwenza i-hydrogen bond. , ukuze amanzi akhululekile abe ngamanzi abophekileyo, ukuze alawule ngokufanelekileyo ukufuduka kwamanzi okubangelwa yimozulu yokushisa okuphezulu, kunye nokufezekisa ukugcinwa kwamanzi aphezulu.

Umgangatho ophezulu we-cellulose HPMC unokuthi uhlakazeke ngokulinganayo kwaye ngokufanelekileyo kwiimveliso zesamente kunye ne-gypsum-based based, kwaye ubophe onke amasuntswana aqinileyo, kwaye wenze ifilimu yokumanzisa, ukufuma kwisiseko kukhutshwe ngokuthe ngcembe ixesha elide, kunye neglue ye-inorganic. i-hydration reaction ye-coagulated material iya kuqinisekisa amandla ebhondi kunye namandla oxinzelelo lwezinto. Ngoko ke, kulwakhiwo oluphezulu lwasehlotyeni, ukuze kufezekiswe umphumo wokugcinwa kwamanzi, kuyimfuneko ukongeza iimveliso ze-HPMC ezikumgangatho ophezulu ngobungakanani obaneleyo ngokwefomula, ngaphandle koko, kuya kubakho ukungonelanga kwe-hydration, ukunciphisa amandla, ukuqhekeka, ukugoba. kunye nokuphalala okubangelwa kukomiswa ngokugqithisileyo. iingxaki, kodwa ukwandisa ubunzima bokwakha kwabasebenzi. Njengoko iqondo lobushushu liyehla, ubungakanani bamanzi HPMC eyongeziweyo ingancitshiswa ngokuthe ngcembe, kwaye isiphumo efanayo yokugcina amanzi inokufumaneka.

Ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose HPMC imveliso ngokwayo ihlala ichatshazelwa zezi zinto zilandelayo:

1. Ukufana kwe-cellulose ether HPMC
I-HPMC esabela ngokulinganayo, i-methoxyl kunye ne-hydroxypropoxyl zisasazwa ngokulinganayo, kwaye izinga lokugcinwa kwamanzi liphezulu.

2. Cellulose ether HPMC thermal gel lobushushu
Ukuphakama kobushushu bejeli ye-thermal, kuphezulu izinga lokugcinwa kwamanzi; kungenjalo, isantya esezantsi yokugcina amanzi.

3. I-Cellulose Etere HPMC Viscosity
Xa i-viscosity ye-HPMC inyuka, izinga lokugcinwa kwamanzi liyenyuka; xa i-viscosity ifikelela kwinqanaba elithile, ukunyuka kwezinga lokugcinwa kwamanzi kuthanda ukuba mnene.

4. Isixa esongezelelweyo se-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 kunye nokunyuka kwexabiso elongezelelweyo; xa isixa-mali esongeziweyo sinyuka ngakumbi, ukunyuka kwezinga lokugcinwa kwamanzi kuyehla.