Hydroxyethythythyth Cellulose (HEC) bụ mmiri dị mkpa na-abụghị nke polymer nke cellose ke sellọ ọrụ cellulose. A na - enweta ya site na mmeghachi omume nke cellose eke na ethlene oxide (ethylene oxide) n'okpuru ọnọdụ alkaline. Hydroxyethyl cellulose is a linear polysaccharide chain composed of glucose units of cellulose in chemical structure, and some or all of the hydroxyl groups on its glucose units are replaced by hydroxyethyl groups to form hydroxyethyl cellulose.
Efrata na kemịkalụ
Ihe eji eme ihe eji eme ihe na-enye ihe na-esochi ya.
Cellulose barbone: cellosuse bụ polysiccharide, ihe bụ isi nke nke bụ ihe ejikọtara nke glucose nke jikọtara ọnụ β-1,4-glycosidic nke agbụ. Ọdịdị a nke cellulose na-enye ya nnukwu kristal na ike anụ ahụ.
Hydroxyethyl ngalaba nke Cellulose Backbone, enwere otu Hydroxy atọ (nke dị na C2, C3 na C3 na C3 ọnọdụ. A na-emepụta hydroxyethythythythythythythythyl site na otu -ch2Oh.cooh) Otu dị iche iche na mmeghachi omume nke a na-eme mmeghachi omume n'etiti ndị otu Hydylene ndị a. Mwepụta nke ndị a machibidoro mkpu ihe nke cellose, na-eme ka mmiri solubise ya, ma mee ka ọ na-egosipụta ezigbo ihe na viscoeline.
Ikike molecular na ogo nke ihe eji egbochi ya: ogo molecular na ogo nke ihe nnọchianya (ya bụ, ọnụ ọgụgụ nke otu hydroxy ọ bụla na-a glucose) nke hydroxyethy ọ bụla bụ ihe abụọ dị mkpa na-emetụta akụrụngwa ya. N'ozuzu, hydroxyethythyl cellulose nwere oke molecular nwere ikike victose na ike viscosity na ike dị elu, ebe ogo nke dochie anya mmiri na nkwụsi ike ya.
Ngwongwo phydtochemical nke hydroxyethythythyth Cellulose
N'ihi ihe okike ya, hydroxyethy na-egosipụta usoro nke ezigbo phycochemical Njirimara:
Mmiri solubili: hydroxyethythyythyth cellulose na-agbanye na mmiri oyi na mmiri ọkụ iji mepụta ngwọta doro anya ma ọ bụ nke dị nro colloidal. Usoro nke onwe ya anaghị emetụta ya nke ọma ma ọ bụrụ na ọ kwụsie ike karịa nke sara mbara (ọ na-abụkarị n'etiti 2 na 12).
Thistening: hydroxyethythyth cellulose nwere ezigbo mmetụta dị mma na ngwọta ya na-emetụta oke molecular nke molecular ibu, ogo nbanye na ntinye uche na ntinye uche. Ka ịta ahụ na-abawanye, viscosity nke ngwọta na-abawanye ụba, yabụ na-eji ya n'ọtụtụ ụlọ ọrụ chọrọ.
Ọrụ dị elu: Ebe ọ bụ na hydroxyethythyth mkpụrụ osisi cellulu nwere hydrophaic otu na ọkpụkpụ hydrophobic, ọ nwere ike belata esemokwu dị na ya ma gosipụta ụfọdụ ọrụ. Ihe onwunwe a na - eme ka ọ bụrụ nke a na - eji akwa, inks na ubi ndị ọzọ, ma melite ihe na - ekpo ọkụ na mkpuchi nke ngwaahịa ahụ.
Ike: hydroxyethythyth cellulose nwere ezigbo nkwụsi ike n'olu oxiding na ọkụ, ma kwụsie ike n'okpuru acid na alkaline ọnọdụ. Ọ gaghị emebi site na ọtụtụ microorganisms na ngwọta, yabụ ọ dịghị mfe ịka njọ n'oge nchekwa.
A na-ejikarị ihe oriri na nchekwa, hydroxyethythyythythythyythyythy na ọgwụ na-eme ọtụtụ ihe n'ihi na ọ ka na-enye ezigbo biocompatibility na oke oke mmiri mgbe mgbanwe ikuku. Iji maa atụ, a na-eji ya dị ka nke na-agbada na nri, dị ka a na-ata ahụhụ na emulsifiers dị na ihe ịchọ mma, yana ihe mkpuchi ma na-achịkwa Matrix maka mbadamba ọgwụ na ọgwụ.
Nkwadebe na ngwa
A na-ekekwa nkwadebe nke heldroxyethythythythythythythythythyth na-ekekarị ụzọ atọ: alkalization nke cellose, mmeghachi omume nke mmeghachi omume, ịdị ọcha na ihicha. First, cellulose is treated under alkaline conditions to activate the hydroxyl groups of cellulose, and then reacted with ethylene oxide to produce hydroxyethyl cellulose. N'ikpeazụ, a na-enweta ngwaahịa ikpeazụ site na usoro dị ka iwepu ihe, dị ọcha na ihicha.
A na-eji hydroxyethythythythyth cellulose na-ewu ewu (dị ka okwute ciment na kemịkalụ) na ụlọ ọrụ nri (dịka ndị na-achịkwa ma na-ekwu okwu).
A na-eji hydroxyethythythyth Cellosethy na-ejikarị mpaghara dị iche iche n'ihi akụrụngwa anụ ahụ na kemịkal ya dị mma na nke ọma. Uniquess nke ihe owuwu ya na-enyere ya aka ịrụ ọrụ dị mkpa na Truning, emulsification, nkwụsị ma kwụsie ike, ma bụ ihe nkiri dị mkpa.
Oge post: Feb-17-2025