Mgbakwụnye na-emighị emi, nke na-arụ ọrụ dị mkpa n'ịkwalite ịrụ ọrụ nke ụlọ akọrọ akọrọ, na-akpata ihe karịrị 40% nke ihe onwunwe na-eri na ngwa ngwa agwakọta akọrọ. Ọtụtụ n'ime admixtures na ahịa ụlọ na-enye ndị na-emepụta si mba ọzọ, na ntinye akwụkwọ ntinye aka nke ngwaahịa na-enyekwa ndị na-eweta ya. Ọnụ ego ngwa ngwa agwakọtara agwakọta na-anọgide na-adị elu, ọ na-esikwa ike iji nnukwu ego na oke dị iche iche mee ka a na-ewu ewu na-ewu ewu masonry na plasta. A na-achịkwa ngwaahịa ahịa dị elu nke ụlọ ọrụ mba ọzọ, na ndị na-emepụta ngwa agha akọrọ akọrọ nwere uru dị ala na enweghị ego efu; ngwa nke admixtures enweghị nyocha usoro na nke ezubere iche, ma na-agbaso usoro mba ọzọ na-enweghị isi. N'ebe a, ihe anyị na-ekerịta gị bụ, kedu ọrụ hydroxypropyl methylcellulose na-ejikọta na ngwa ngwa akọrọ akọrọ?
Hydroxypropyl methylcellulose bụ ụdị cellulose nke mmepụta na oriri ya na-abawanye ngwa ngwa n'afọ ndị na-adịbeghị anya. A na-eme hydroxypropyl methylcellulose nke owu a nụchara anụcha mgbe ọgwụgwọ alkalization gasịrị, na-eji propylene oxide na methyl chloride dị ka etherification agents, cellulose na-abụghị ionic mix ether mere site na usoro mmeghachi omume. Ogo nke nnọchi bụ n'ozuzu 1.2 ~ 2.0. Ngwongwo ya dị iche na-adabere na nha nke ọdịnaya metxyl na ọdịnaya hydroxypropyl. Njirimara nke hydroxypropyl methylcellulose bụ ndị a:
1. Hydroxypropyl methylcellulose dị mfe soluble na mmiri oyi, ọ ga-ezutekwa ihe isi ike na igbari na mmiri ọkụ. Ma gelation okpomọkụ ya na mmiri ọkụ dị nnọọ elu karịa nke methyl cellulose. A na-emeziwanye ihe solubility na mmiri oyi ma e jiri ya tụnyere methyl cellulose.
2. Viscosity nke hydroxypropyl methylcellulose metụtara ịdị arọ ya. Ka ibu molekụla ahụ buru ibu, ka viscosity dị elu. Okpomọkụ na-emetụtakwa viscosity ya, ka okpomọkụ na-abawanye, viscosity na-ebelata. Otú ọ dị, mmetụta nke elu viscosity ya na okpomọkụ dị ala karịa nke methyl cellulose. Ngwọta ya kwụsiri ike mgbe echekwara ya na ụlọ okpomọkụ.
3. Njide mmiri nke hydroxypropyl methylcellulose na-adabere na ego mgbakwunye ya, viscosity, wdg, na njigide mmiri ya n'okpuru otu ihe mgbakwunye ahụ dị elu karịa nke methyl cellulose.
4. Hydroxypropyl methylcellulose kwụsiri ike na acid na alkali, na ngwọta mmiri ya dị nnọọ ike na pH = 2 ~ 12. Caustic soda na mmiri lime enweghị mmetụta dị nta na arụmọrụ ya, mana alkali nwere ike mee ka mgbasa ya dị ngwa ma mee ka viscosity ya dịkwuo ntakịrị. Hydroxypropyl methylcellulose kwụsiri ike na nnu nkịtị, ma mgbe ntinye nke ngwọta nnu dị elu, viscosity nke hydroxypropyl methylcellulose ngwọta na-ebuli elu.
5. Hydroxypropyl methylcellulose nwere ike ịgwakọta na mmiri-soluble polymers na-etolite a edo na elu viscosity ngwọta. Dị ka mmanya polyvinyl, starch ether, chịngọm akwukwo nri, wdg.
6. Hydroxypropyl methylcellulose nwere nguzogide enzyme dị mma karịa methylcellulose, na ohere nke mmebi enzymatic nke ngwọta ya dị ala karịa nke methylcellulose.
7. Adhesion nke hydroxypropyl methylcellulose na-ewu ngwa agha dị elu karịa nke methylcellulose.
Oge nzipu: Mee-09-2023