Methyl Hydroxyethyl Cellulose (MHEC) bụ ether cellulose nkịtị. A na-enweta ya site na etherification nke cellulose ma jiri ya mee ihe n'ọtụtụ ụlọ ọrụ dị ka ihe owuwu, ụlọ ọgwụ, ihe ịchọ mma, na nri. MHEC nwere ezigbo mmiri solubility, ndim, nkwusioru, na ihe eji eme ihe, ma bụrụ ihe mgbakwunye ọrụ dị oke mkpa.
1. Chemical Ọdịdị na nkwadebe
1.1 Chemical Ọdịdị
A na-enweta MHEC site na methylation akụkụ na hydroxyethylation nke cellulose. Ọdịdị kemịkal ya na-abụkarị site na nnọchi nke otu hydroxyl na cellulose molecular chain site methyl (-CH₃) na hydroxyethyl (-CH₂CH₂OH). A na-egosipụtakarị usoro nhazi ya dị ka:
Cell-��-���3+cell-
Selị na-anọchite anya ọkpụkpụ molekụla cellulose. Ogo nke nnọchi nke otu methyl na hydroxyethyl na-emetụta njirimara nke MHEC, dị ka mmiri solubility na viscosity.
1.2 Usoro nkwadebe
Nkwadebe nke MHEC gụnyere usoro ndị a:
Mmeghachi omume etherification: Iji cellulose dị ka akụrụngwa, a na-ebu ụzọ mesoo ya na ngwọta alkaline (dị ka sodium hydroxide) iji mee ka ìgwè hydroxyl dị na cellulose rụọ ọrụ. Mgbe ahụ, a na-agbakwunye methanol na ethylene oxide iji mee mmeghachi omume etherification nke mere na ìgwè hydroxyl dị na cellulose na-anọchi anya otu methyl na hydroxyethyl.
Neutralization na ịsacha: Mgbe emechara mmeghachi omume ahụ, a na-ewepụ alkali ngafe site na mmeghachi omume neutralization acid, a na-asachakwa ngwaahịa mmeghachi omume na mmiri ugboro ugboro iji wepụ ihe ndị sitere na ngwaahịa na ihe ndị na-emeghị eme.
Ịkpọ nkụ na ịkụpịa: A na-ehichapụ nkwusioru MHEC a na-asacha iji nweta ntụ ntụ MHEC, ma mesịa gwerie ya iji nweta ịdị mma achọrọ.
2. Njirimara anụ ahụ na nke kemịkal
2.1 Ọdịdị na solubility
MHEC bụ ntụ ntụ na-acha ọcha ma ọ bụ ìhè na-acha odo odo nke na-adị mfe soluble na mmiri oyi na mmiri ọkụ, ma ọ nwere obere solubility na organic solvents. Njikọ ya na-ejikọta ya na uru pH nke ngwọta, ọ na-egosikwa ezigbo solubility na nnọpụiche na-adịghị ike acidic.
2.2 Ọkpụkpụ na nkwusioru
MHEC nwere ike ịbawanye viscosity nke ngwọta ahụ mgbe ọ gbasasịrị na mmiri, n'ihi ya, a na-ejikarị ya eme ihe dị ka onye na-agba ume. N'otu oge ahụ, MHEC nwekwara ezigbo nkwusioru na dispersibility, nke nwere ike igbochi ntanye ahụ, na-eme ka ọ bụrụ onye na-ekpuchi ihe na mkpuchi na ihe ụlọ.
2.3 Nkwụsi ike na ndakọrịta
MHEC nwere ezigbo acid na nkwụsi ike alkali ma nwee ike idowe nkwụsi ike ya na oke pH. Na mgbakwunye, MHEC nwere ezigbo nnabata na electrolytes, nke na-enyere ya aka ịrụ ọrụ nke ọma n'ọtụtụ usoro kemịkalụ.
3. Ngwa ngwa
3.1 ụlọ ọrụ ihe owuwu
N'ebe a na-ewu ihe owuwu, a na-ejikarị MHEC eme ihe dị ka onye na-ekpuchi mmiri na mmiri maka ihe ndị dị ka ngwa agha, putty, na gypsum. MHEC nwere ike imeziwanye arụmọrụ nke ihe eji arụ ọrụ nke ọma, mee ka adhesion na ihe mgbochi na-eme ka ọ dịkwuo mma n'oge a na-ewu ụlọ, na-agbatị oge a na-emeghe, ma n'otu oge ahụ na-eme ka njigide mmiri nke ihe na-eme ka ọ ghara igbochi mgbawa na mbelata ike nke mmiri na-efu ngwa ngwa.
3.2 Ihe ịchọ mma
A na-eji MHEC dị ka emulsifier, thickener, na stabilizer na ịchọ mma. Ọ nwere ike inye ihe ịchọ mma mma aka na rheology, mee ka nkwụsi ike na iji ahụmahụ nke ngwaahịa ahụ mee ihe. Dịka ọmụmaatụ, na ngwaahịa ndị dị ka lotions, creams, na shampoos, MHEC nwere ike igbochi stratification na mmiri ozuzo nke ọma ma mee ka viscosity ngwaahịa ahụ dịkwuo elu.
3.3 ụlọ ọrụ ọgwụ
N'ime ụlọ ọrụ na-emepụta ọgwụ, a na-eji MHEC dị ka ihe nkedo, onye na-ahapụ ya, na onye na-akwụsịtụ maka mbadamba. Ọ nwere ike melite ike na disintegration Njirimara nke mbadamba ma hụ na ntọhapụ nke ọgwụ ike. Na mgbakwunye, a na-ejikarị MHEC eme ihe na ọgwụ nkwusioru iji nyere ihe ndị na-eme ihe na-arụ ọrụ aka ịgbasa nke ọma ma melite nkwụsi ike na bioavailability nke ọgwụ.
Ụlọ ọrụ nri 3.4
Na nri ụlọ ọrụ, MHEC bụ tumadi ji dị ka a thickener na stabilizer, na adabara dị iche iche nri formulations, dị ka mmiri ara ehi ngwaahịa, sauces, condiments, wdg O nwere ike n'ụzọ dị irè melite udidi na uto nke nri na ịgbatị shelf ndụ. nri.
4. Nchekwa gburugburu ebe obibi na nchekwa
4.1 Environmental Performance
MHEC nwere ezigbo biodegradability na enweghị mmetọ doro anya na gburugburu ebe obibi. Ebe ọ bụ na ihe ndị bụ isi ya bụ cellulose na ihe ndị na-emepụta ya, MHEC nwere ike jiri nwayọọ nwayọọ na-adaba n'ime ihe ndị na-adịghị emerụ ahụ na gburugburu ebe obibi na ọ gaghị emerụ ala na mmiri ahụ ogologo oge.
4.2 Nchekwa
MHEC nwere nchekwa dị elu ma bụrụ nke na-adịghị egbu egbu na adịghị emerụ ahụ mmadụ. Mgbe ejiri ya na ihe ịchọ mma na ụlọ ọrụ nri, ọ ga-agbasorịrị ụkpụrụ na ụkpụrụ nchekwa dị mkpa iji hụ na ọdịnaya MHEC dị na ngwaahịa ahụ dị n'ime oke akọwapụtara. Mgbe a na-eji ya eme ihe, ekwesịrị ịkpachara anya iji gbochie ikuku ume nke uzuzu buru ibu iji zere mgbakasị iku ume.
5. Ọdịnihu mmepe mmepe
5.1 Mmelite arụmọrụ
Otu n'ime ntụziaka nyocha n'ọdịnihu nke MHEC bụ ime ka ọrụ ya dịkwuo mma site n'ịkwalite usoro nhazi na nhazi usoro. Dịka ọmụmaatụ, site n'ịbawanye ogo nke nnọchi na ịkwalite usoro ihe omimi ahụ, MHEC nwere ike ịrụ ọrụ ka mma na ọnọdụ ngwa ngwa pụrụ iche, dị ka nguzogide okpomọkụ dị elu, acid na alkali resistance, wdg.
5.2 Mgbasawanye ngwa
Site na mmepe na-aga n'ihu nke ihe ọhụrụ na usoro ọhụrụ, a na-atụ anya ka mpaghara ngwa nke MHEC gbasaa n'ihu. Dịka ọmụmaatụ, n'ọhịa nke ike ọhụrụ na ihe ọhụrụ, MHEC, dị ka ihe mgbakwunye na-arụ ọrụ, nwere ike ịrụ ọrụ dị mkpa na-arịwanye elu.
5.3 Nchekwa gburugburu ebe obibi na nkwado
Site na mmụba nke mmata gburugburu ebe obibi, mmepụta na ntinye nke MHEC ga-etolitekwa n'ụzọ dị mma na gburugburu ebe obibi. Nnyocha n'ọdịnihu nwere ike ilekwasị anya n'ibelata ihe mkpofu na usoro mmepụta, melite biodegradaability nke ngwaahịa, na ịmepụta usoro mmepụta akwụkwọ ndụ akwụkwọ ndụ.
Methyl hydroxyethyl cellulose (MHEC), dị ka a multifunctional cellulose ether, nwere sara mbara ngwa atụmanya na mmepe ikike. Site na nyocha miri emi na akụrụngwa kemịkalụ ya na ịkwalite teknụzụ ngwa ngwa, MHEC ga-arụ ọrụ dị mkpa na ụlọ ọrụ dị iche iche ma na-enye aka n'ịkwalite arụmọrụ ngwaahịa na nchekwa gburugburu ebe obibi. N'ọdịnihu nke sayensị ihe sayensị na injinia, ntinye nke MHEC ga-eweta ọtụtụ ihe ọhụrụ na ọganihu.
Oge nzipu: Jun-21-2024