Hydroxypropyl Methylcellulose (HPMC) naHydroxyethyl cellulose (HEC) bụ ma usoro cellulose, nke a na-ejikarị eme ihe na ụlọ ọrụ, ọgwụ, ihe ịchọ mma na ubi ndị ọzọ. A na-egosipụta isi ihe dị iche iche ha na usoro ihe omimi, njirimara solubility, mpaghara ngwa na akụkụ ndị ọzọ.
1. Ọdịdị molekụla
Hydroxypropyl Methylcellulose (HPMC)
HPMC bụ ihe soluble mmiri ewebata site na iwebata methyl (-CH3) na hydroxypropyl (-CH2CHOHCH3) dị iche iche n'ime agbụ mkpụrụ ndụ cellulose. Kpọmkwem, usoro ihe omimi nke HPMC nwere ihe eji arụ ọrụ abụọ, methyl (-OCH3) na hydroxypropyl (-OCH2CH(OH)CH3). Ọtụtụ mgbe, oke mmeghe nke methyl dị elu, ebe hydroxypropyl nwere ike melite solubility nke cellulose nke ọma.
Hydroxyethyl cellulose (HEC)
HEC bụ ihe ewepụtara site na iwebata otu ethyl (-CH2CH2OH) n'ime agbụ molekul cellulose. Na nhazi nke hydroxyethyl cellulose, otu ma ọ bụ karịa hydroxyl otu (-OH) nke cellulose na-anọchi ethyl hydroxyl otu (-CH2CH2OH). N'adịghị ka HPMC, usoro ihe omimi nke HEC nwere naanị otu ihe nnọchi hydroxyethyl na enweghị otu methyl.
2. Mmiri solubility
N'ihi ọdịiche dị n'ụdị, mmiri solubility nke HPMC na HEC dị iche.
HPMC: HPMC nwere ezigbo mmiri solubility, karịsịa na-anọpụ iche ma ọ bụ ubé alkaline pH ụkpụrụ, ya solubility dị mma karịa HEC. Mwebata nke methyl na hydroxypropyl dị iche iche na-eme ka ọ dịkwuo mfe ma nwee ike ịbawanye viscosity ya site na mmekọrịta ya na ụmụ irighiri mmiri.
HEC: HEC na-emekarị soluble na mmiri, ma solubility ya dị ntakịrị, karịsịa na mmiri oyi, ọ na-adịkarị mkpa ka a gbazee n'okpuru ọnọdụ okpomọkụ ma ọ bụ na-achọ ka ọ dị elu iji nweta mmetụta viscosity yiri ya. Solubility ya metụtara ọdịiche nhazi nke cellulose na hydrophilicity nke otu hydroxyethyl.
3. Viscosity na rheological Njirimara
HPMC: N'ihi ọnụnọ nke abụọ dị iche iche hydrophilic otu (methyl na hydroxypropyl) na ya ụmụ irighiri, HPMC nwere ezi viscosity mgbanwe Njirimara na mmiri na ọtụtụ ebe na-eji na adhesives, coatings, detergents, pharmaceutical preparations na ndị ọzọ ubi. N'ebe dị iche iche, HPMC nwere ike inye mgbanwe site na viscosity dị ala gaa na viscosity dị elu, na viscosity na-enwe mmetụta karịa mgbanwe pH.
HEC: A pụkwara imezi viscosity nke HEC site n'ịgbanwe ntinye uche, ma ngbanwe mgbanwe viscosity ya dị warara karịa nke HPMC. A na-ejikarị HEC eme ihe na ọnọdụ ebe achọrọ viscosity dị ala na nke ọkara, karịsịa n'ihe owuwu, ihe ncha na ngwaahịa nlekọta onwe onye. Njirimara rheological nke HEC dị ntakịrị, karịsịa na gburugburu acidic ma ọ bụ na-anọpụ iche, HEC nwere ike inye viscosity kwụsie ike karị.
4. Ngwa ngwa
Hydroxypropyl methylcellulose (HPMC)
Ụlọ ọrụ ihe owuwu: A na-ejikarị HPMC eme ihe na ciment mortar na mkpuchi n'ime ụlọ ọrụ ihe owuwu iji meziwanye mmiri, ịrụ ọrụ na igbochi mgbawa.
Ụlọ ọrụ na-emepụta ọgwụ: Dị ka onye na-ahụ maka ntọhapụ ọgwụ, HPMC na-ejikarị eme ihe na ụlọ ọrụ ọgwụ. Ọ bụghị naanị na enwere ike iji ya dị ka onye na-emepụta mbadamba nkume na capsules, kamakwa dị ka nrapado iji nyere aka ịhapụ ọgwụ ahụ n'otu oge.
Ụlọ ọrụ nri: A na-ejikarị HPMC eme ihe na nhazi nri dị ka ihe nkwụnye, thickener ma ọ bụ emulsifier iji melite udidi na uto nke nri.
Ụlọ ọrụ ịchọ mma: Dị ka a thickener, HPMC na-ọtụtụ ebe na ngwaahịa ndị dị ka ude, shampoos, na conditioners dịkwuo viscosity na nkwụsi ike nke ngwaahịa.
Hydroxyethyl cellulose (HEC)
Ụlọ ọrụ ihe owuwu: A na-ejikarị HEC na ciment, gypsum, na tile adhesives iji mee ka mmiri dịkwuo mma na oge njigide nke ngwaahịa ahụ.
Ndị na-ehicha ihe: A na-ejikarị HEC eme ihe na ndị na-ehicha ụlọ, ndị na-asa ákwà na ngwaahịa ndị ọzọ iji mee ka viscosity nke ngwaahịa dịkwuo mma ma melite mmetụta nhicha.
Ụlọ ọrụ ịchọ mma: A na-eji HEC eme ihe n'ọtụtụ ebe na ngwaahịa nlekọta anụ ahụ, mmiri ịsa ahụ, shampoos, wdg dị ka onye na-agba ume na nkwụsịtụ iji meziwanye ọdịdị na nkwụsi ike nke ngwaahịa ahụ.
Mwepu mmanụ: A pụkwara iji HEC mee ihe na nhazi mmanụ dị ka ihe na-eme ka mmiri dị na mmiri na-eme ka mmiri na-eme ka mmiri dị elu na-enyere aka mee ka viscosity nke mmiri mmiri na-eme ka ọ dịkwuo mma.
5. pH kwụsie ike
HPMC: HPMC na-enwe mmetụta nke ukwuu maka mgbanwe pH. N'okpuru ọnọdụ acidic, solubility nke HPMC na-ebelata, nke nwere ike imetụta arụmọrụ ya. Ya mere, a na-ejikarị ya na ebe na-anọpụ iche na obere alkaline gburugburu.
HEC: HEC ka kwụsiri ike karịa oke pH. Ọ nwere ike ime mgbanwe na gburugburu acidic na alkaline, n'ihi ya, a na-ejikarị ya eme ihe na nhazi nke chọrọ nkwụsi ike siri ike.
HPMCnaHECdị iche iche na ihe owuwu molekụla, solubility, arụmọrụ mgbanwe viscosity, na mpaghara ngwa. HPMC nwere ezigbo mmiri solubility na viscosity mmezi arụmọrụ, ma dabara maka ngwa chọrọ viscosity dị elu ma ọ bụ arụmọrụ ntọhapụ a kapịrị ọnụ; ebe HEC nwere ezigbo pH nkwụsi ike na ngwa ngwa dịgasị iche iche, ọ dịkwa mma maka oge ndị chọrọ ọkara na obere viscosity na ike ime mgbanwe gburugburu ebe obibi. Na ngwa n'ezie, nhọrọ nke ihe achọrọ ka enyocha ya dabere na mkpa ụfọdụ.
Oge nzipu: Feb-24-2025