Hydroxyethyl cellulose (HEC) bụ ether nonionic cellulose nke na-agbaze mmiri, isi mmalite ya bụ cellulose eke. Eke cellulose dị n'ebe nile na osisi na bụ isi akụkụ nke osisi cell mgbidi. Kpọmkwem, hydroxyethyl cellulose na-eme site na kemịkal na-emeghachi cellulose eke na ethylene oxide n'okpuru ọnọdụ alkaline. A na-akpọkarị usoro mmeghachi omume kemịkalụ ethoxylation, nke si na ya pụta bụ na a na-edochi akụkụ nke hydroxyethyl cellulose na mkpụrụ ndụ cellulose eke.
Ndị a bụ usoro nke usoro nkwadebe nke hydroxyethyl cellulose:
Isi mmalite nke cellulose: A na-ewepụtakarị cellulose site na ihe ọkụkụ dị ka owu na osisi. A na-asachapụ cellulose a na-amịpụta ma na-acha ọcha iji wepụ adịghị ọcha dị ka lignin, hemicellulose na ihe ndị ọzọ na-abụghị cellulose iji nweta cellulose dị ọcha.
Ọgwụgwọ Alkalinization: Gwakọta cellulose na ngwọta sodium hydroxide (NaOH), na otu hydroxyl dị na cellulose na-emeghachi omume na sodium hydroxide iji mepụta sodium cellulose. N'ime usoro a, usoro mkpụrụ ndụ cellulose na-agbasa ruo n'ókè ụfọdụ, na-eme ka ọ dịkwuo mfe imeghachi omume na ethylene oxide.
Mmeghachi omume ethoxylation: Alkalized sodium cellulose na-agwakọta ya na ethylene oxide (C2H4O) na ụfọdụ okpomọkụ na nrụgide. Usoro mgbanaka nke ethylene oxide na-emepe ka ọ bụrụ otu ethoxy (-CH2CH2OH), nke jikọtara ya na otu hydroxyl na mkpụrụ ndụ cellulose iji mepụta hydroxyethyl cellulose. Enwere ike ịme usoro mmeghachi omume a na ogo dị iche iche, na-ebute hydroxyethyl cellulose na ogo dị iche iche nke nnọchi.
Ọgwụgwọ mgbe emechara: Ngwaahịa mgbe mmeghachi omume ahụ na-enwekarị alkali na-emeghị eme, ihe mgbaze na ngwaahịa ndị ọzọ. Iji nweta hydroxyethyl cellulose dị ọcha, a na-achọ usoro ọgwụgwọ mgbe ọ gasịrị dịka nkwụsịtụ, ịsacha na ihicha. Ebumnuche nke usoro ọgwụgwọ ndị a bụ iwepụ alkali fọdụrụnụ, ihe mgbaze na ihe ndị sitere na ngwaahịa iji nweta ngwaahịa dị ọcha ikpeazụ.
A na-eji hydroxyethyl cellulose mee ihe n'ọtụtụ ebe n'ime ụlọ ọrụ dị iche iche n'ihi njirimara kemịkalụ pụrụ iche na arụmọrụ dị mma. Kpọmkwem, hydroxyethyl cellulose nwere ezigbo mmiri solubility, ndim, nkwụsi ike, imepụta ihe nkiri na mmanu, a na-ejikarị ya na mpaghara ndị a:
Ihe owuwu ụlọ: N'ime ihe owuwu ụlọ, a na-ejikarị hydroxyethyl cellulose eme ihe dị ka ihe na-ekpuchi mmiri na mmiri maka ihe ndị dabeere na ciment na ihe ndị dabeere na gypsum. Ọ nwere ike imeziwanye arụmọrụ ihe owuwu nke ihe, melite njide mmiri, ịrụ ọrụ na mgbochi mgbochi nke ngwa agha, gbasaa oge na-emeghe ma hụ na ọganihu na-aga nke ọma.
Ụlọ ọrụ agba: Na agba, a na-eji hydroxyethyl cellulose mee ihe dị ka onye na-ekpo ọkụ, onye na-akwụsịtụ na emulsifier iji meziwanye rheology na nkwụsi ike nke agba, gbochie pigmenti sedimentation, na welie flatness na gloss nke mkpuchi.
Ihe ịchọ mma na ngwaahịa nlekọta onwe onye: N'ihe ịchọ mma, a na-ejikarị hydroxyethyl cellulose eme ihe dị ka ihe na-esi ísì, ihe nkiri mbụ na moisturizer. Ọ nwere ike inye ngwaahịa na-enwe mmetụta dị mma, melite nkwụsi ike ngwaahịa na nrapado, ma kwalite mmetụta moisturize.
Ụlọ ọrụ na-emepụta ọgwụ: N'ebe a na-emepụta ọgwụ, a na-eji hydroxyethyl cellulose mee ihe maka nkwadebe ọgwụ. Dị ka akụkụ nke mbadamba ihe na-adịgide adịgide, ihe mkpuchi ihe nkiri, wdg, ọ nwere ike ijikwa ọnụego ntọhapụ nke ọgwụ ọjọọ ma melite nkwụsi ike na bioavailability nke ọgwụ ọjọọ.
Ụlọ ọrụ nri: N'ụlọ ọrụ nri, a na-eji hydroxyethyl cellulose dị ka ihe mgbakwunye nri na-ekere òkè n'ịgba, emulsification na nkwụsi ike. A na-eji ya eme ihe n'ọtụtụ ihe ọṅụṅụ, condiments, ngwaahịa mmiri ara ehi na nri ndị ọzọ iji meziwanye ọdịdị na uto nke ngwaahịa.
Hydroxyethyl cellulose nwekwara ngwa dị mkpa na mmịpụta mmanụ, imepụta akwụkwọ, mbipụta akwa na ụlọ ọrụ ịcha akwa. Na mmịpụta mmanụ, a na-eji hydroxyethyl cellulose mee ihe dị ka onye na-agbapụta mmiri na stabilizer maka igwu mmiri mmiri, nke nwere ike imeziwanye ikike nkwusioru nke mmiri na-egwupụta mmiri ma gbochie ọdịda mgbidi ọma. N'ime ụlọ ọrụ na-emepụta akwụkwọ, a na-eji ya dị ka onye na-ejigide ihe na-eme ka ọ dịkwuo mma iji meziwanye ike na ịdịte aka nke akwụkwọ. N'ime mbipụta akwa na akwa akwa, a na-eji hydroxyethyl cellulose mee ihe dị ka ihe na-agba agba iji nyere aka na-ebi akwụkwọ na ịcha akwa ka a na-ekesa nke ọma ma melite ogo mbipụta na agba.
A na-enweta hydroxyethyl cellulose site na cellulose eke site na usoro mmeghachi omume kemịkal. Ngwa ya sara mbara abụghị naanị n'ihi njirimara anụ ahụ na kemịkalụ ya dị mma, kamakwa n'ihi na ọ nwere ike inye azịza dị iche iche n'ọtụtụ ụlọ ọrụ iji gboo mkpa teknụzụ dị iche iche.
Oge nzipu: Ọgọst-13-2024