Ọdịiche dị na Njirimara Physicochemical nke HPMC na HEMC

Gel okpomọkụ bụ ihe dị mkpa na-egosi cellulose ether. Ngwọta mmiri nke cellulose ethers nwere ihe na-ekpo ọkụ. Ka okpomọkụ na-abawanye, viscosity na-aga n'ihu na-ebelata. Mgbe okpomọkụ ngwọta ruru ụfọdụ uru, ngwọta cellulose ether adịghịzi akọwapụta, ma na-emepụta colloid na-acha ọcha, n'ikpeazụkwa na-efunahụ viscosity ya. Nnwale okpomọkụ gel na-ezo aka na ịmalite ihe nlele cellulose ether na 0.2% ntinye nke cellulose ether ngwọta na kpoo ya nwayọọ nwayọọ na mmiri ịsa mmiri ruo mgbe ngwọta ahụ pụtara na-acha ọcha ma ọ bụ ọbụna na-acha ọcha gel, na viscosity na-efu kpamkpam. Ọnọdụ okpomọkụ nke ngwọta bụ gel okpomọkụ nke cellulose ether.

Oke nke methoxy, hydroxypropyl na HPMC nwere mmetụta ụfọdụ na solubility mmiri, ikike ijide mmiri, ọrụ elu na gel okpomọkụ nke ngwaahịa. N'ikwu okwu n'ozuzu, HPMC nwere ọdịnaya methoxyl dị elu na ọdịnaya hydroxypropyl dị ala nwere ezigbo mmiri solubility na ezigbo ọrụ elu, ma gel okpomọkụ dị ala: ịba ụba ọdịnaya hydroxypropyl na ibelata ọdịnaya methoxy nwere ike ime ka okpomọkụ dị elu. Otú ọ dị, nnukwu ọdịnaya hydroxypropyl ga-ebelata okpomọkụ gel, solubility mmiri na ọrụ elu. Ya mere, ndị na-emepụta cellulose ether ga-achịkwa nke ọma ọdịnaya otu iji hụ na ịdịmma ngwaahịa kwụsiri ike.

Ngwa ụlọ ọrụ ihe owuwu

HPMC na HEMC nwere ọrụ ndị yiri ya na ihe ụlọ. Enwere ike iji ya mee ihe dị ka onye na-ekesa, onye na-ejigide mmiri, onye na-agba mmiri, ihe nkedo, wdg. A na-ejikarị ya eme ihe na-emepụta ngwa ngwa ciment na ngwaahịa gypsum. A na-eji ngwa ciment mee ihe iji mee ka njikọ ya na ịrụ ọrụ ya dịkwuo elu, belata flocculation, na-abawanye viscosity na shrinkage, ma nwee ọrụ nke njide mmiri, na-ebelata mmiri mmiri n'elu ihe dị n'elu, na-abawanye ike, na-egbochi cracks na weathering nke mmiri soluble salts. wdg A na-ejikarị ciment, gypsum, ngwa agha na ihe ndị ọzọ. Enwere ike iji ya dị ka onye na-emepụta ihe nkiri, onye na-ekpu mmiri, emulsifier na stabilizer maka agba latex na agba resin na-agbaze mmiri. Ọ nwere ezigbo nguzogide iyi, ịdị n'otu na nrapado, na-eme ka esemokwu dị elu, nkwụsi ike nke acid-base na ndakọrịta na pigmenti ọla. N'ihi nkwụsi ike nchekwa viscosity ya dị mma, ọ dabara adaba dị ka onye na-ekesa na mkpuchi emulsion. N'ihe niile, ọ bụ ezie na usoro ahụ dị ntakịrị, ọ na-arụ ọrụ nke ọma ma nwee ọtụtụ ngwa ngwa.

Gel okpomọkụ nke cellulose ether na-ekpebi nkwụsi ike ya na ngwa. Okpomọkụ gel nke HPMC na-abụkarị n'etiti 60 Celsius na 75 Celsius, dabere na ụdị, ọdịnaya otu na usoro mmepụta nke ndị nrụpụta dị iche iche. N'ihi njirimara nke otu HEMC, okpomọkụ gelation ya dị elu, na-adịkarị karịa 80 Celsius C, ya mere nkwụsi ike ya na okpomọkụ dị elu bụ HPMC. Na ngwa bara uru, na gburugburu ebe obibi okpomọkụ na-ekpo ọkụ, ikike ijide mmiri nke HEMC nwere otu viscosity na doses dị mma karịa nke HPMC. Karịsịa na ndịda, a na-etinye ngwa agha mgbe ụfọdụ na oke okpomọkụ. The cellulose ether nke obere okpomọkụ gel ga-atụfu ya ndim na mmiri na-ejigide mmetụta na elu okpomọkụ, si otú accelerating ike siri ike nke ciment ngwa agha na kpọmkwem na-emetụta ewu na mgbawa mgbochi.

N'ihi na enwere ọtụtụ hydrophilic na nhazi nke HEMC, ọ nwere hydrophilicity ka mma. Tụkwasị na nke ahụ, nkwụsị nkwụsị nke HEMC dịkwa mma. Mmetụta ngwa nke HPMC na nrapado tile ga-aka mma.