Mmetụta siri ike nke cellulose ether na-adabere na: ogo nke polymerization nke cellulose ether, ntinye ngwọta, ọnụ ọgụgụ shear, okpomọkụ na ọnọdụ ndị ọzọ. Ngwongwo gelling nke ngwọta bụ ihe onwunwe nke alkyl cellulose na ihe ndị na-emepụta ya. Njirimara gelation metụtara ogo ngbanwe, ntinye ngwọta na ihe mgbakwunye. Maka ihe nrụpụta hydroxyalkyl gbanwetụrụ, njirimara gel na-emetụtakwa ogo mgbanwe nke hydroxyalkyl. N'ihi na ala viscosity MC na HPMC, 10% -15% ngwọta nwere ike kwadebere, ọkara viscosity MC na HPMC nwere ike kwadebere 5% -10% ngwọta, mgbe elu viscosity MC na HPMC nwere ike na-akwadebe 2% -3% ngwọta, na-emekarị. A na-edozikwa nhazi nke viscosity nke cellulose ether site na 1%-2% ngwọta.
Ether cellulose dị arọ nke dị elu nwere arụmọrụ njupụta dị elu. N'otu ngwọta ntinye uche ahụ, polymers nwere ịdị arọ dị iche iche nwere viscosities dị iche iche. Ọkwa dị elu. Enwere ike nweta viscosity ebumnuche naanị site n'ịgbakwụnye nnukwu ether cellulose dị arọ dị ala. Viscosity ya nwere ntakịrị ịdabere na ọnụ ọgụgụ shear, na viscosity dị elu na-erute viscosity lekwasịrị anya, na ihe mgbakwunye a chọrọ dị ntakịrị, na viscosity na-adabere na nrụpụta ọrụ. Ya mere, iji nweta otu ihe na-agbanwe agbanwe, a ghaghị ijide n'aka na ether cellulose ether (ntụkwasị uche nke ngwọta) na ngwọta viscosity ga-emerịrị. The gel okpomọkụ nke ngwọta na-ebelata linearly na-abawanye nke ịta nke ihe ngwọta, na gels na ụlọ okpomọkụ mgbe eru a ụfọdụ ịta. The gelling ịta ahụhụ nke HPMC dịtụ elu na ụlọ okpomọkụ.
Enwere ike ịhazi nkwekọ site na ịhọrọ nha nha na ịhọrọ cellulose ethers nwere ogo mgbanwe dị iche iche. Ihe a na-akpọ mgbanwe bụ iwebata ụfọdụ ngbanwe nke otu hydroxyalkyl na nhazi ọkpụkpụ nke MC. Site n'ịgbanwe ụkpụrụ ngbanwe nke ndị nnọchi anya abụọ ahụ, ya bụ, ụkpụrụ nnọchi DS na ms nke ndị otu methoxy na hydroxyalky nke anyị na-ekwukarị. Enwere ike nweta ihe dị iche iche chọrọ ịrụ ọrụ nke cellulose ether site n'ịgbanwe ụkpụrụ nnọchi anya nke ihe abụọ a nọchiri anya ya.
Mmekọrịta dị n'etiti nkwụsi ike na mgbanwe: mgbakwunye cellulose ether na-emetụta mmiri oriri nke ngwa agha, na-agbanwe mmiri na-ejikọta mmiri na ciment bụ mmetụta na-eme ka ọ dịkwuo elu, nke dị elu nke usoro onunu ogwu, na-abawanye oriri mmiri.
Cellulose ethers nke a na-eji na ihe owuwu ụlọ ntụ ntụ ga-agbaze ngwa ngwa na mmiri oyi ma nye usoro kwesịrị ekwesị maka usoro ahụ. Ọ bụrụ na enyere ya ọnụ ọgụgụ shear, ọ ka na-aghọ flocculent na colloidal block, nke bụ ngwaahịa na-adịghị mma ma ọ bụ na-adịghị mma.
Enwekwara mmekọrịta dị mma n'ahịrị n'etiti nkwụsi ike nke cement ciment na usoro nke cellulose ether. Cellulose ether nwere ike ịbawanye viscosity nke ngwa agha. Ka usoro onunu ogwu buru ibu, ka mmetụta ya pụta ìhè. Nnukwu viscosity cellulose ether aqueous ngwọta nwere thixotropy dị elu, nke bụkwa isi njirimara cellulose ether. Aqueous ngwọta nke MC polymers na-enwekarị pseudoplastic na-abụghị thixotropic fluidity n'okpuru ha gel okpomọkụ, ma Newtonian eruba Njirimara na ala shiee ọnụego. Pseudoplasticity na-abawanye site na ịdị arọ molekụla ma ọ bụ itinye uche nke cellulose ether, n'agbanyeghị ụdị nnọchi na ogo nke nnọchi. Ya mere, cellulose ethers nke otu viscosity ọkwa, n'agbanyeghị MC, HPMC, HEMC, ga-mgbe niile na-egosi otu rheological Njirimara ma ọ bụrụhaala na ịta na okpomọkụ na-na-anọgide na-adịgide adịgide.
A na-emepụta gels ihe owuwu mgbe a na-ebuli okpomọkụ elu, na oke thixotropic na-eme. Nnukwu ntinye uche na obere viscosity cellulose ethers na-egosi thixotropy ọbụna n'okpuru gel okpomọkụ. Ngwongwo a bara uru nke ukwuu maka ngbanwe nke larịị na sagging na-ewu ụlọ mgbidi. Ọ dị mkpa ka a kọwaa ebe a na elu viscosity nke cellulose ether, mma njigide mmiri, ma elu nke viscosity, elu nke ikwu molekụla arọ nke cellulose ether, na kwekọrọ ekwekọ mbelata ya solubility, nke nwere mmetụta ọjọọ. na ngwa agha ịta na ịrụ ọrụ ihe owuwu. Ihe dị elu nke viscosity, otú ahụ ka ọ na-apụta ìhè nke ọma mmetụta na ngwa agha ahụ, ma ọ bụghị nke zuru oke. Ụfọdụ obere viscosity na obere viscosity, mana cellulose ether gbanwetụrụ nwere arụmọrụ ka mma n'ịkwalite ike nhazi nke ngwa agha mmiri. Site na mmụba nke viscosity, njigide mmiri nke cellulose ether na-akawanye mma.
Oge nzipu: Feb-16-2023