Nwere ike ịgwakọta HPMC na CMC
Methyl cellulose na-acha ọcha ma ọ bụ na-acha ọcha dị ka fibrous ma ọ bụ granular ntụ ntụ;Enweghị isi, enweghị ụtọ.Ngwaahịa a na mmiri ọzịza n'ime ngwọta colloidal doro anya ma ọ bụ dịtụ turbid;Na-adịghị edozi na ethanol zuru oke, chloroform ma ọ bụ diethyl ether.Ọ na-agbasa ngwa ngwa na fụrụ akpụ na mmiri ọkụ na 80-90 ℃, na agbaze ngwa ngwa mgbe obi jụrụ.Ngwọta mmiri na-esiwanye ike na ụlọ okpomọkụ, ma nwee ike gel na okpomọkụ dị elu, gel nwere ike gbanwee na ngwọta na okpomọkụ.
Ọ nwere ọmarịcha wettability, mgbasa, adhesion, ndim, emulsification, njigide mmiri na imepụta ihe nkiri, yana enweghị ike mmanụ.Ihe nkiri a nwere ezigbo ike, mgbanwe na nghọta.N'ihi na ọ bụ ndị na-abụghị ionic, ọ nwere ike dakọtara na ndị ọzọ emulsifiers, ma ọ dị mfe nnu si, na ngwọta bụ ike na nso nke PH2 - 12. Sodium carboxymethyl cellulose ngwaahịa a bụ sodium nnu nke cellulose carboxymethyl ether. bụ nke anionic cellulose ether, na-acha ọcha ma ọ bụ milky na-acha ọcha fibrous ntụ ntụ ma ọ bụ urughuru, njupụta 0.5-0.7 g / cubic centimeters, fọrọ nke nta ka odor, enweghị ụtọ, hygroscopic.Ọ dị mfe igbasa na mmiri n'ime uzo gelatinous ngwọta, insoluble na ethanol na ndị ọzọ organic solvents.
Mgbe pH nke ngwọta mmiri bụ 6.5 - 8.5, viscosity nke slurry na-ebelata nke ukwuu mgbe pH bụ> 10 ma ọ bụ <5, na arụmọrụ kachasị mma mgbe pH bụ 7. Maka nkwụsi ike nke okpomọkụ, viscosity na-ebili ngwa ngwa n'okpuru. 20 ℃, mgbanwe nwayọọ nwayọọ na 45 ℃, na colloid denaturation na viscosity na Njirimara ibelata budata mgbe kpụ ọkụ n'ọnụ ruo ogologo oge n'elu 80 ℃.Na-edozi ngwa ngwa na mmiri, ngwọta transperent;Ọ kwụsiri ike na ngwọta alkaline, ọ dịkwa mfe hydrolyze n'ihe banyere acid.Mgbe uru pH dị 2-3, mmiri ozuzo ga-eme, na mmiri ozuzo ga-emekwa n'ihe banyere nnu metal multivalent.Hydroxypropyl methyl cellulose, makwaara dị ka hydroxypropyl methyl cellulose, cellulose hydroxypropyl methyl ether, bụ nhọrọ nke ukwuu dị ọcha owu cellulose dị ka akụrụngwa, n'okpuru alkaline ọnọdụ site pụrụ iche etherification na nkwadebe.
Soluble na mmiri na ọtụtụ polar C na kwesịrị ekwesị nke ethanol / mmiri, propanol / mmiri, dichloroethane, wdg, insoluble na diethyl ether, acetone, zuru ezu ethanol, ọzịza na mmiri oyi n'ime a doro anya ma ọ bụ dịtụ turbidized colloidal ngwọta.Ihe ngwọta mmiri nwere ọrụ elu, nghọta dị elu na arụmọrụ kwụsiri ike.HPMC nwere ihe onwunwe nke gel na-ekpo ọkụ.Mgbe kpochara, ngwaahịa aqueous ngwọta na-etolite jel ọdịda, wee gbazee mgbe jụrụ oyi.Okpomọkụ gel nke nkọwa dị iche iche dị iche.
Oge nzipu: Sep-09-2022