Lekwasị anya na cellulose ethers

Hydroxyethylcellulose ọ bụ ihe sitere n'okike ma ọ bụ ihe sịntetịt?

Okwu mmalite nke Hydroxyethylcellulose (HEC):

Hydroxyethylcellulose bụ ihe sitere na cellulose, polysaccharide na-emekarị nke a na-ahụ na mgbidi cell nke osisi. Ihe mejupụtara cellulose bụ nkeji glucose ugboro ugboro jikọtara ya na njikọ β-1,4 glycosidic. A na-enweta Hydroxyethylcellulose site n'ịgbanwe cellulose site na iwebata otu hydroxyethyl (-CH2CH2OH) n'ime ọkpụkpụ azụ ya.

Usoro mmepụta:

Etherification nke Cellulose: mmepụta nke HEC gụnyere etherification nke cellulose. Usoro a na-amalitekarị site na cellulose sitere na osisi pulp ma ọ bụ akwa owu.

Mmeghachi omume na Ethylene Oxide: Cellulose na-emeghachi omume na ethylene oxide n'okpuru ọnọdụ alkaline. Mmeghachi omume a na-eduga na nnọchi nke otu hydroxyl na azụ azụ cellulose na otu hydroxyethyl, na-ebute hydroxyethylcellulose.

Ọcha: A na-asachapụ ngwaahịa ahụ ka ọ wepụ ihe ọ bụla reagents na ngwaahịa akụkụ.

Njirimara nke Hydroxyethylcellulose:

Solubility: HEC bụ soluble na ma oyi na mmiri ọkụ, na-eme ka o doo anya na ngwọta turbid dị ntakịrị dabere na ntinye uche.

Viscosity: Ọ na-egosipụta omume pseudoplastic, nke pụtara viscosity ya na-ebelata na ọnụ ọgụgụ shear na-abawanye. Enwere ike idozi viscosity nke ngwọta HEC site na ihe dị iche iche dị ka itinye uche na ogo nke nnọchi.

Ihe nkiri na-emepụta ihe nkiri: HEC nwere ike ịmepụta ihe nkiri na-agbanwe agbanwe na nke na-ejikọta ọnụ, na-eme ka ọ baa uru na ngwa dị iche iche ebe achọrọ ịmepụta ihe nkiri.

Onye na-ahụ maka ịdị arọ: Otu n'ime isi ojiji nke HEC bụ ihe na-eme ka ọ dị arọ n'ụdị dị iche iche, dị ka ihe ịchọ mma, ọgwụ na ngwaahịa nlekọta onwe onye.

Ngwa nke Hydroxyethylcellulose:

Ngwa ịchọ mma na ngwaahịa nlekọta onwe onye: A na-eji HEC eme ihe n'ọtụtụ ebe na ihe ịchọ mma na ngwaahịa nlekọta onwe onye dị ka onye na-agbapụta, stabilizer, na onye na-emepụta ihe nkiri na ngwaahịa dị ka lotions, creams, shampoos, na ntanya eze.

Pharmaceuticals: N'ime usoro ọgwụ, HEC na-eje ozi dị ka onye na-akwụsịtụ, ihe na-ekekọta, na matrix na-achịkwa na mkpuchi mbadamba na usoro ọnụ.

Agba na mkpuchi: A na-eji HEC mee ihe na agba na mkpuchi mmiri dị ka ihe na-eme ka ọkpụkpụ na rheology modifier iji chịkwaa viscosity na melite ngwa ngwa.

Ụlọ ọrụ nri: N'ụlọ ọrụ nri, a na-eji HEC eme ihe dị ka ihe na-eme ka ọ sie ike ma na-eme ka ọ dị ike na ngwaahịa ndị dị ka sauces, uwe, na ngwaahịa mmiri ara ehi.

Arụmụka nhazi nke eke ma ọ bụ sịntetik:

Nkewa nke hydroxyethylcellulose dị ka eke ma ọ bụ sịntetik bụ isiokwu nke arụmụka. Nke a bụ arụmụka sitere n'akụkụ abụọ:

Arụmụka maka nhazi ọkwa dịka sịntetik:

Mgbanwe kemịkalụ: HEC sitere na cellulose site na usoro mgbanwe kemịkalụ gụnyere mmeghachi omume nke cellulose na ethylene oxide. A na-ewere mgbanwe kemịkalụ a dị ka sịntetị na okike.

Mmepụta mmepụta ihe: A na-emepụta HEC bụ isi site na usoro mmepụta ihe metụtara mmeghachi omume a na-achịkwa na usoro nchacha, nke bụ ụdị mmepụta ihe mmepụta ihe.

Degree mgbanwe: Ogo nke nnọchi na HEC nwere ike ịchịkwa nke ọma n'oge njikọta, na-egosi mmalite nke sịntetik.

Arụmụka maka nhazi ọkwa dịka eke:

E sitere na Cellulose: A na-enweta HEC n'ikpeazụ site na cellulose, polymer eke dị n'ụba dị na osisi.

Isi mmalite emeghari ohuru: Cellulose, ihe mmalite maka mmepụta HEC, sitere na ihe eji emeghari ohuru dika pulp osisi na owu.

Biodegradability: Dị ka cellulose, HEC bụ biodegradable, na-agbada n'ime ihe ndị na-adịghị emerụ ahụ na gburugburu ebe obibi ka oge na-aga.

Myirịta na-arụ ọrụ na Cellulose: N'agbanyeghị mgbanwe kemịkalụ, HEC na-ejigide ọtụtụ ihe nke cellulose, dị ka solubility na mmiri na biocompatibility.

hydroxyethylcellulose bụ polymer vasatail ewepụtara site na cellulose site na usoro mgbanwe kemịkalụ. Ọ bụ ezie na mmepụta ya na-agụnye mmeghachi omume sịntetik na usoro mmepụta ihe, a na-enweta ya n'ikpeazụ site na isi iyi nke eke na mmeghari ohuru. Arụmụka gbasara ma HEC kwesịrị nkewa dị ka eke ma ọ bụ sịntetik na-egosipụta mgbagwoju anya nke ịkọwa okwu ndị a n'ọnọdụ nke polymers eke gbanwetụrụ. Ka o sina dị, biodegradability ya, mmeghari ohuru, na myirịta ọrụ ya na cellulose na-egosi na o nwere njirimara nke ogige okike na nke sịntetik, na-eme ka ókèala dị n'etiti nhazi abụọ ahụ.


Oge nzipu: Eprel-01-2024
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