Ntụnyere nke HEC na HPMC na ngwa mkpuchi

N'ime ụlọ ọrụ mkpuchi nke oge a, iji melite àgwà rheological, nkwụsi ike nchekwa na arụmọrụ owuwu nke mkpuchi ahụ, ọ na-adịkarị mkpa itinye ụfọdụ ihe mgbakwunye polymer bara uru. N'ime ha,hydroxyethyl cellulose (HEC)nahydroxypropyl methylcellulose (HPMC)bụ ihe abụọ na-eme ka cellulose ether thicken na stabilizers dị n'ọtụtụ ebe. Ọ bụ ezie na ha abụọ bụ cellulose ethers na-abụghị ionic, e nwere ọdịiche doro anya na nhazi kemịkalụ, njirimara arụmọrụ na mmetụta ojiji na mkpuchi.

1. Nhazi kemịkalụ na ike ịgbaze

HEC bụ polima na-agbaze mmiri nke e ji cellulose eke mee site n'iwebata otu hydroxyethyl site na mmeghachi omume etherification. Nhazi molekul ya bara ụba na otu hydrophilic hydroxyl na hydroxyethyl, nke na-eme ka ọ nwee ezigbo mmiri na-agbaze. HEC nwere ike ịgbaze ngwa ngwa na mmiri oyi iji mepụta ngwọta viscous doro anya.

HPMC bụ polima e ji ewebata hydroxypropyl na methyl substituents na molekul cellulose. N'ihi ọnụnọ nke otu methyl hydrophobic ya, ọ nwere ọrụ elu na ihe ndị na-emepụta ihe nkiri ka mma karịa HEC. HPMC na-aza nwayọ nwayọ na mmiri oyi, na-ewe oge ụfọdụ iji gbazee kpamkpam, okpomọkụ na-emetụtakwa ya nke ukwuu.

2. Ntụnyere nke njirimara rheological

HEC nwere àgwà rheological dị larịị, na-egosi pseudoplasticity, ya bụ, njirimara shear-thinning, ma dabara adaba maka sistemụ mkpuchi nke chọrọ nhazi dị mma. Viskeletal nke ngwọta HEC na-ebelata n'okpuru akwa mkpuchi dị elu, nke na-enyere aka na nhicha ahịhịa, mkpuchi roller na nhazi ọkwa n'oge owuwu.

Ngwọta HPMC na-egosi àgwà pseudoplastic siri ike, yana viscosity dị elu n'okpuru obere shea, nke na-enyere aka igbochi sedimentation na slagging; viscosity na-ebelata nke ukwuu n'okpuru nnukwu shea, nke na-enyere aka ime ka owuwu ahụ ka mma. Ya mere, HPMC na-arụ ọrụ nke ọma na ngwa mkpuchi ihu nke chọrọ ihe siri ike na-egbochi slagging.

3. Idobe mmiri na arụmọrụ owuwu

HPMC nwere nchekwa mmiri ka mma karịa HEC, ọkachasị n'ebe kpọrọ nkụ ma ọ bụ n'ọnọdụ okpomọkụ dị elu, HPMC nwere ike igbu oge ịfụ mmiri nke ọma ma gbochie mgbawa ma ọ bụ mbelata nke ihe mkpuchi ahụ. Nke a na-eme ka HPMC na-ejikarị ya eme ihe na mkpuchi putty, gypsum na simenti, karịsịa maka ọrụ eserese n'oge okpomọkụ ma ọ bụ ihu igwe kpọrọ nkụ.

Ọ bụ ezie na HEC nwekwara ọrụ idobe mmiri ụfọdụ, mmetụta ya dị ntakịrị ala karịa HPMC, ọkachasị n'ebe okpomọkụ dị elu na gburugburu ebe ikuku na-efe. Mmiri anaghị ejide ya nke ọma nwere ike ime ka ọ kpọọ nkụ ngwa ngwa mgbe e wuchara ya, si otú a na-emetụta njupụta na ịdị larịị nke mkpuchi ahụ.

4. Nguzogide enzyme na ire ere

HEC nwere nnukwu ọdịnaya nke otu hydroxyethyl n'ime nhazi ya, ọ dịkwa mfe imebi site na obere nje bacteria. Ya mere, ike enzyme ya adịghị mma, ọkachasị mgbe echekwara ya ruo ogologo oge, ọ nwere ike ibute mmebi, a ga-etinyekwa ihe nchekwa iji mee ka oge nchekwa dịkwuo ogologo.

HPMC nwere ike iguzogide enzyme karịa HEC ma kwụsie ike karịa. Ọ dabara nke ọma maka mkpuchi ụlọ ọrụ mmepụta ihe nwere oke nchekwa achọrọ.

5. Ọnụ ego na ngwa ahịa

Site n'echiche ọnụ ahịa, HEC dị obere ma dabara adaba maka ngwaahịa mkpuchi ụlọ buru ibu, nke dị ọnụ ala. Mmetụta ya dị mma na mmụba ya na-eme ka ọ nwee oke ahịa na ngwa dịka mkpuchi mgbidi ime ụlọ na agba latex dị ala.

Ọ bụ ezie na HPMC dị ntakịrị ọnụ karịa, arụmọrụ ya zuru oke na-eme ka a na-ejikarị ya eme ihe na sistemụ mkpuchi etiti ruo elu, ọkachasị n'oge ndị nwere nnukwu ihe achọrọ maka arụmọrụ owuwu, mgbochi ịcha mmiri na idobe mmiri, dị ka mkpuchi mgbidi mpụta, mkpuchi na-agbanwe agbanwe, na mkpuchi na-eguzogide ihu igwe.

6. Gburugburu ebe obibi na nchekwa

Ha abụọ bụ cellulose ethers na-abụghị ionic, ha nwere ezigbo ndakọrịta gburugburu ebe obibi na ike ịgbaze, ha enweghị ihe ndị na-agbanwe agbanwe (VOCs), ha kwekọkwara n'ọdịdị mmepe nke mkpuchi akwụkwọ ndụ akwụkwọ ndụ na nke na-adịghị emebi gburugburu ebe obibi. Agbanyeghị, n'oge eji ya, a ka kwesịrị ilebara anya na uzuzu ya na ịdị ọcha ya, a kwesịkwara ichebe ya maka nchekwa ọrụ dị mkpa.

HECnaHPMCnke ọ bụla nwere uru nke ya n'itinye mkpuchi. HEC dabara adaba maka ngwaahịa mkpuchi nke lekwasịrị anya na njikwa ọnụ ahịa ma nwee nnukwu ihe achọrọ maka mmiri mmiri owuwu; ebe a na-ejikarị HPMC eme ihe n'ọtụtụ ebe na mkpuchi etiti ruo elu yana ihe achọrọ arụmọrụ dị elu n'ihi na ọ na-ejide mmiri nke ọma, na-egbochi ịla n'iyi na arụmọrụ owuwu. N'ime ngwa ndị dị adị, a ga-ahọrọ HEC ma ọ bụ HPMC nke ọma dabere na ihe ndị dị ka ihe achọrọ maka arụmọrụ nke usoro mkpuchi, ụzọ owuwu na ọnọdụ ihu igwe, a pụkwara iji ya mee ihe ọnụ dịka ọ dị mkpa iji nweta arụmọrụ zuru oke ka mma.