Hydroxyethyl Methyl Cellulose (HEMC) bụ ihe sitere na cellulose polymer eke. Ọ bụ polymer na-agbaze mmiri na-etolite mgbe mgbanwe kemịkalụ ma nwee ọtụtụ ngwa. Dị ka cellulose ether dị mkpa na-edozi mmiri, ọ nwere ọtụtụ ihe pụrụ iche nke anụ ahụ na nke kemịkal ma na-ejikarị arụ ọrụ, mkpuchi, ihe ịchọ mma, nri na ọgwụ.
1. Chemical Ọdịdị na mejupụtara
Hydroxyethyl methyl cellulose bụ cellulose gbanwetụrụ site na mmeghachi omume etherification nke cellulose na ethylene oxide (epoxy) na methyl chloride mgbe ọgwụgwọ alkali gasịrị. Ọdịdị kemịkal ya nwere skeleton cellulose na ihe abụọ dochie anya ya, hydroxyethyl na methoxy. Mwepụta nke hydroxyethyl nwere ike imeziwanye mmiri solubility ya, ebe ntinye nke methoxy nwere ike ime ka hydrophobicity ya dịkwuo mma, na-eme ka ọ dịkwuo mma nkwụsi ike ngwọta na mmepụta ihe nkiri.
2. Solubility
Hydroxyethyl methyl cellulose bụ ihe na-abụghị ionic cellulose ether na ezigbo mmiri solubility, nke nwere ike agbaze na mmiri oyi na mmiri ọkụ. Ọ naghị emeghachi omume na ions na mmiri mgbe ọ na-agbaze, ya mere ọ nwere ezigbo solubility n'okpuru ọnọdụ mmiri dị iche iche. Usoro mgbasa ozi na-achọ ka a gbasaa ya na mmiri oyi na mbụ, na mgbe oge ọzịza gasịrị, a na-eji nwayọọ nwayọọ na-emepụta ihe ngwọta edo na nke doro anya. Na organic solvents, HEMC na-egosi ele mmadụ anya n'ihu solubility, karịsịa na nnukwu pola solvents dị ka ethanol na ethylene glycol, nke nwere ike igbari ya akụkụ.
3. Viscosity
The viscosity nke HEMC bụ otu n'ime ya kasị mkpa Njirimara na-eji ọtụtụ ebe na ndim, nkwusioru na film akpụ. Viscosity ya na-agbanwe na mgbanwe na ntinye uche, okpomọkụ na ọnụ ọgụgụ shear. N'ozuzu, viscosity nke ngwọta na-abawanye nke ukwuu na mmụba nke ntinye ngwọta. Ngwọta nke nwere ntinye uche dị elu na-egosi viscosity dị elu ma dị mma maka iji dị ka ihe na-emepụta ihe maka ihe owuwu ụlọ, mkpuchi na adhesives. N'ime ọnọdụ okpomọkụ ụfọdụ, viscosity nke ngwọta HEMC na-ebelata na okpomọkụ na-arịwanye elu, na ihe onwunwe a na-eme ka ọ dị mma maka ngwa mmepụta ihe n'okpuru ọnọdụ okpomọkụ dị iche iche.
4. Nkwụsi ike okpomọkụ
Hydroxyethyl methylcellulose na-egosi nkwụsi ike dị mma na okpomọkụ dị elu ma nwee ụfọdụ nguzogide okpomọkụ. N'ozuzu, n'okpuru ọnọdụ okpomọkụ dị elu (dịka n'elu 100 ° C), usoro ihe omimi ya dị ntakịrị ma ọ dịghị mfe ire ere ma ọ bụ mebie ya. Nke a na-enye ohere ka HEMC nọgide na-enwe ihe siri ike, njigide mmiri na ihe jikọrọ ya na gburugburu okpomọkụ dị elu na ụlọ ọrụ ihe owuwu (dị ka usoro ihicha ngwa ngwa) na-enweghị ezigbo uru n'ihi mgbanwe okpomọkụ.
5. Ịba ụba
HEMC nwere ihe na-eme ka ọ dị oke mma ma bụrụ ihe na-arụ ọrụ nke ọma nke a na-ejikarị na usoro nhazi dị iche iche. Ọ nwere ike n'ụzọ dị irè dịkwuo viscosity nke aqueous ngwọta, emulsions na suspensions, na nwere ezigbo shiee thinning Njirimara. Na ọnụ ọgụgụ dị ala, HEMC nwere ike ime ka viscosity nke usoro ahụ dịkwuo elu, ebe ọ bụ na ọnụ ọgụgụ dị elu na-egosiputa viscosity dị ala, nke na-enyere aka melite mma nke ọrụ n'oge ngwa. Mmetụta ya na-agbapụta ọ bụghị nanị na ọ na-ejikọta ya na ntinye uche, kamakwa ọ na-emetụta uru pH na okpomọkụ nke ngwọta.
6. Njide mmiri
A na-ejikarị HEMC eme ihe dị ka onye na-ejigide mmiri na ụlọ ọrụ ihe owuwu. Njide mmiri ya dị mma nwere ike ịgbatị oge mmeghachi omume hydration nke ihe ndị sitere na ciment ma melite arụmọrụ na-arụ ọrụ na ntinye nke ngwa agha ụlọ. N'oge usoro ihe owuwu, HEMC nwere ike ibelata mmiri na-efunahụ nke ọma ma zere nsogbu ndị dị ka mgbawa na ike na-efu site na ihicha ngwa ngwa ngwa ngwa. Tụkwasị na nke ahụ, na agba na inks ndị na-adabere na mmiri, nchekwa mmiri nke HEMC nwekwara ike ịnọgide na-enwe mmiri nke agba, mee ka arụ ọrụ nke agba na-eme ka ọ dịkwuo mma.
7. Biocompatibility na nchekwa
N'ihi na HEMC sitere na cellulose eke, ọ nwere ezigbo biocompatibility na obere nsị. Ya mere, a na-ejikwa ya mee ihe n'ọtụtụ ebe na ngalaba ọgwụ na ihe ịchọ mma. Enwere ike iji ya dị ka onye na-agbasa ma ọ bụ na-ahapụ ya n'ime mbadamba ọgwụ iji nyere aka ntọhapụ ọgwụ ike n'ime ahụ. Tụkwasị na nke ahụ, dị ka onye na-emepụta ihe na-emepụta ihe nkiri na ihe ịchọ mma, HEMC nwere ike inye mmetụta na-ekpo ọkụ maka akpụkpọ ahụ, na nchekwa ya dị mma na-eme ka ọ dị mma maka iji ogologo oge mee ihe.
8. Ngwa ngwa
N'ihi njirimara multifunctional nke hydroxyethyl methylcellulose, a na-eji ya eme ihe n'ọtụtụ ebe mmepụta ihe:
Ụlọ ọrụ na-ewu ihe: N'ime ihe owuwu ụlọ dị ka ciment mortar, putty powder, na gypsum ngwaahịa, HEMC nwere ike iji dị ka ihe na-esi ísì ụtọ, onye na-ejigide mmiri na nrapado iji meziwanye arụmọrụ ihe owuwu na njedebe ngwaahịa.
Mkpuchi na inks: A na-eji HEMC eme ihe n'ọtụtụ ebe na agba na inks nke mmiri dị ka ihe na-eme ka ọ dịkwuo elu na nkwụsi ike iji meziwanye ọkwa, nkwụsi ike, na gloss nke agba mgbe akpọnwụchara.
Ngalaba ahụike: Dị ka onye na-agbasa, nrapado na onye na-ahapụ ya n'ime ndị na-ebu ọgwụ, ọ nwere ike ịhazi ọnụego ntọhapụ nke ọgwụ na ahụ ma melite bioavailability nke ọgwụ.
Ihe ịchọ mma na ngwaahịa nlekọta onwe onye: N'ime ngwaahịa nlekọta onwe onye dị ka lotions, creams, na shampoos, HEMC nwere ike iji dị ka ihe na-esi ísì na mmiri mmiri, ma nwee ezigbo mmekọrịta akpụkpọ na ntutu.
Ụlọ ọrụ nri: N'ụfọdụ nri, HEMC nwere ike iji mee ihe dị ka stabilizer, emulsifier na onye na-emepụta ihe nkiri. N'agbanyeghị na ojiji ya na nri dị n'okpuru mmachi iwu na mba ụfọdụ, amatala nchekwa ya nke ọma.
9. Nkwụsi ike gburugburu ebe obibi na mmebi
Dị ka ihe na-adabere na bio, HEMC nwere ike iji nwayọọ nwayọọ na-eweda ya na gburugburu ebe obibi, na usoro mmebi ya na-abụkarị site n'omume nke microorganisms. Ya mere, HEMC nwere obere mmetọ na gburugburu ebe obibi mgbe ejiri ya ma bụrụ kemịkalụ na-emetụta gburugburu ebe obibi. N'okpuru ọnọdụ eke, HEMC nwere ike mechaa decompose n'ime mmiri, carbon dioxide na obere ụmụ irighiri ihe ndị ọzọ, ọ gaghị eme ka mmetọ mmetọ dị ogologo oge na-akpakọba n'ime ala na mmiri.
Hydroxyethyl methylcellulose bụ ihe dị ezigbo mkpa sitere na cellulose na-agbaze mmiri. N'ihi na ya pụrụ iche anụ ahụ na chemical Njirimara ndị dị otú ahụ dị ka magburu onwe ndim, mmiri njigide, thermal kwụsie ike na biocompatibility, ọ na-ọtụtụ-eji na ọtụtụ ụlọ ọrụ dị ka ewu, coatings, ọgwụ, ntecha, wdg Ya magburu onwe solubility na viscosity akara ikike ime ya ihe ihe mgbakwunye na-arụ ọrụ dị mkpa na usoro nhazi dị iche iche. Karịsịa n'ọhịa ebe ọ dị mkpa ịbawanye viscosity ngwaahịa, ịgbatị ndụ ọrụ ma ọ bụ melite arụmọrụ arụmọrụ, HEMC na-arụ ọrụ na-enweghị atụ. N'otu oge ahụ, dịka ihe eji eme ihe na gburugburu ebe obibi, HEMC egosila nkwado dị mma na ngwa ụlọ ọrụ mmepụta ihe ma nwee atụmanya ahịa dị mma.
Oge nzipu: Sep-27-2024