Ma hydroxypropyl methylcellulose na hydroxyethyl cellulose bụ cellulose

Hydroxypropyl methylcellulose (HPMC)na hydroxyethyl cellulose (HEC) bụ mkpụrụ ndụ cellulose abụọ dị mkpa nke a na-ejikarị eme ihe na ụlọ ọrụ dị iche iche n'ihi ihe ha pụrụ iche. Ọ bụ ezie na ha abụọ sitere na cellulose, ha nwere ụdị kemịkal dị iche iche ma gosipụta njirimara na ngwa dị iche iche.

1. Okwu Mmalite nke Cellulose mmepụta:
Cellulose bụ polysaccharide sitere n'okike achọtara na mgbidi cell osisi, nke nwere eriri ahịrị ahịrị nke nkeji glucose jikọtara ya na njikọ β(1→4) glycosidic. A na-enweta ihe nrụpụta cellulose site n'ịgbanwe cellulose na kemịkalụ iji kwalite akụrụngwa akọwapụtara ma ọ bụ webata ọrụ ọhụrụ. HPMC na HEC bụ ụdị usoro abụọ a na-ejikarị eme ihe na ụlọ ọrụ sitere na ọgwụ ruo n'iwu.

2. Nkwekọrịta:
A na-emepụta HPMC site n'imeghachite cellulose na propylene oxide iji webata otu hydroxypropyl na emesia methyl chloride iji webata otu methyl. Nke a na-ebute ngbanwe nke hydroxyl dị iche iche na agbụ cellulose, na-emepụta ngwaahịa nwere mma solubility na mmepụta ihe nkiri.

N'aka nke ọzọ, a na-emepụta HEC site na ịmeghachi cellulose na ethylene oxide iji tinye ìgwè hydroxyethyl. Enwere ike ịchịkwa ogo nke nnọchi (DS) na ma HPMC na HEC site n'ịgbanwe ọnọdụ mmeghachi omume, na-emetụta ihe onwunwe ha dị ka viscosity, solubility, na gelation omume.

3. Ọdịdị kemịkalụ:
HPMC na HEC dị iche n'ụdị otu nnọchi anya nke etinyere na ọkpụkpụ azụ cellulose. HPMC nwere ma hydroxypropyl na methyl otu, ebe HEC nwere hydroxyethyl otu. Ndị nọchiri anya ndị a na-enye njirimara pụrụ iche na nke ọ bụla, na-emetụta omume ha na ngwa dị iche iche.

4. Njirimara anụ ahụ:
Ma HPMC na HEC bụ polymers soluble mmiri nwere ihe ndị na-eme ka ọ dị mma. Agbanyeghị, ha na-egosipụta ọdịiche dị na viscosity, ikike hydration na ikike imepụta ihe nkiri. HPMC na-enwekarị viscosity dị elu ma e jiri ya tụnyere HEC n'otu nha nha, na-eme ka ọ dabara maka ngwa na-achọ ka ukwuu.

Na mgbakwunye, HPMC na-emepụta ihe nkiri dokwuo anya na nke jikọrọ ọnụ n'ihi ihe nnọchi methyl, ebe HEC na-etolite ihe nkiri dị nro na nke na-agbanwe agbanwe. Esemokwu ndị a na akụrụngwa ihe nkiri na-eme ka ihe ọ bụla dabara adaba maka ngwa ngwa na ọgwụ, ngwaahịa nlekọta onwe onye na ụlọ ọrụ nri.

5. Ngwa:
5.1 Ụlọ ọrụ ọgwụ:
A na-eji ma HPMC na HEC n'ọtụtụ ebe n'ụdị ọgwụ dị ka ihe eji ejikọta, ihe nchara, na ihe mkpuchi ihe nkiri. Ha na-eme ka iguzosi ike n'ezi ihe nke mbadamba ihe, na-achịkwa mwepụta ọgwụ, ma na-akwalite mmetụta ọnụ na nhazi mmiri. A na-ahọrọ HPMC maka usoro mwepụta na-adịgide adịgide n'ihi ọnụego hydration ya na-adị nwayọọ, ebe a na-ejikarị HEC eme ihe na ngwọta anya na ude n'elu n'ihi nghọta ya na ndakọrịta ya na mmiri mmiri.

5.2 Ụlọ ọrụ ihe owuwu:
N'ime ụlọ ọrụ ihe owuwu,HPMCnaHECA na-arụ ọrụ dị ka ihe mgbakwunye na ihe ndị sitere na ciment, dị ka ngwa agha, grouts, na renders. Ha na-eme ka arụmọrụ rụọ ọrụ, njide mmiri, na nrapado, na-eme ka arụmọrụ dịkwuo elu na ịdịte aka nke ngwaahịa ikpeazụ. A na-ahọrọ HPMC maka ikike njigide mmiri dị elu, nke na-ebelata mgbawa ma na-eme ka ịtọ oge.

5.3 Ngwaahịa nlekọta onwe onye:
Mwepụta abụọ a na-achọta ngwa na ngwaahịa nlekọta onwe onye dị ka shampoos, lotions, na creams dị ka ihe na-agba agba, emulsifiers, na stabilizers. HEC na-enye udidi dị nro na nke na-egbuke egbuke na nhazi, na-eme ka ọ dị mma maka ngwaahịa nlekọta ntutu isi na ude akpụkpọ anụ. A na-eji HPMC, ya na ihe na-emepụta ihe nkiri kachasị elu, na-eji sunscreens na usoro ịchọ mma chọrọ nguzogide mmiri na iyi ogologo oge.

5.4 Ụlọ ọrụ nri:
N'ụlọ ọrụ nri, HPMC na HEC na-eje ozi dị ka ihe na-eme ka ọ sie ike, ndị na-eme ka ahụ sie ike, na texturizer na ngwaahịa dị iche iche gụnyere sauces, uwe, na desserts. Ha na-eme ka mmetụta nke ọnụ dịkwuo mma, na-egbochi syneresis, ma na-eme ka àgwà mmetụta nke nhazi nri. A na-ahọrọ HPMC maka idoanya ya na nkwụsi ike okpomọkụ, na-eme ka ọ dabara maka ngwa chọrọ gels transperent na emulsion kwụsiri ike.

6. Nkwubi okwu:
hydroxypropyl methylcellulose (HPMC) na hydroxyethyl cellulose (HEC) bụ mkpụrụ ndụ cellulose nwere ụdị kemịkal dị iche iche, ihe onwunwe na ngwa. Ọ bụ ezie na ha abụọ na-enye ihe njiri mara mma na imepụta ihe nkiri, ha na-egosipụta ọdịiche dị na viscosity, nkọwapụta ihe nkiri, na omume hydration. Ịghọta ọdịiche ndị a dị mkpa maka ịhọrọ usoro kwesịrị ekwesị maka ngwa ngwa n'ofe ụlọ ọrụ dịka ọgwụ, ihe owuwu, nlekọta onwe onye, ​​na nri. Ka nyocha na-aga n'ihu na-aga n'ihu, a na-atụ anya mgbanwe ndị ọzọ na ntinye nke mmepụta cellulose, na-enye aka na mkpa ha na-aga n'ihu na mpaghara mmepụta ihe dị iche iche.