Lekwasị anya na cellulose ethers

Hydroxyethyl cellulose (HEC) njirimara na ojiji

1. Okwu Mmalite nke Hydroxyethyl Cellulose (HEC):

Hydroxyethylcellulose bụ ihe soluble mmiri sitere na cellulose, polymer eke dị na mgbidi cell osisi. Mgbanwe nke cellulose na otu hydroxyethyl na-eme ka ọ dị nro na mmiri ma na-enye ihe ndị dị mkpa na HEC, na-eme ka HEC bụrụ ihe bara uru na ngwa dị iche iche.

2. Ọdịdị nke HEC:

Ihe owuwu nke HEC sitere na cellulose, polysaccharide linear nke mejupụtara nkeji glucose ugboro ugboro jikọtara ya na njikọ β-1,4-glycosidic. A na-ewebata otu Hydroxyethyl n'ime ọkpụkpụ azụ cellulose site na mmeghachi omume etherification. Ọkwa nke nnọchi (DS) na-ezo aka na nkezi ọnụọgụ hydroxyethyl otu otu glucose ma na-emetụta solubility na viscosity nke HEC.

3. Njirimara nke HEC:

A. Mmiri solubility: Otu n'ime ihe ndị bụ isi nke HEC bụ mmiri mmiri dị elu, nke a na-ekwu na nnọchi hydroxyethyl. Ihe onwunwe a na-eme ka ọ dị mfe ịmepụta ngwọta na mgbasa ozi kwesịrị ekwesị maka ngwa dị iche iche.

b. Ikike nke ukwuu: A na-amata HEC n'ọtụtụ ebe maka ihe na-eme ka ọ sie ike na ngwọta mmiri. Mgbe a gbasasịrị na mmiri, ọ na-etolite gel doro anya na viscous, na-eme ka ọ dị mma maka ngwa ndị chọrọ njikwa viscosity.

C. pH Stability: HEC na-egosipụta nkwụsi ike n'elu oke pH, na-eme ka ọ dakọtara na nhazi na mpaghara acidic na alkaline.

d. Nkwụsi ike okpomọkụ: Ngwọta HEC na-anọgide na-adịgide adịgide karịa oke okpomọkụ. Ha nwere ike ịgafe ọtụtụ usoro kpo oku na oyi na-enweghị nnukwu mgbanwe na viscosity ma ọ bụ ihe ndị ọzọ.

e. Nhazi ihe nkiri: HEC nwere ike ịmepụta ihe nkiri na-agbanwe agbanwe na nke doro anya nke kwesịrị ekwesị maka ngwa dị ka mkpuchi, nrapado na ihe nkiri.

F. Ọrụ Elu: HEC nwere ihe ndị dị ka surfactant, nke bara uru na ngwa chọrọ ngbanwe elu ma ọ bụ nkwụsi ike.

4.Synthesis nke HEC:

Ngwakọta nke HEC na-agụnye mmeghachi omume etherification nke cellulose na ethylene oxide na ọnụnọ nke alkaline catalyst. Enwere ike ịchịkwa mmeghachi omume ahụ iji nweta ogo achọrọ nke nnọchi, si otú ahụ na-emetụta ihe ikpeazụ nke ngwaahịa HEC. A na-arụkarị synthesis n'okpuru ọnọdụ a na-achịkwa iji hụ na ngwaahịa na ịdị mma.

5. Ngwa nke HEC:

A. Agba na mkpuchi: A na-eji HEC eme ihe n'ọtụtụ ebe dị ka ihe na-agba agba na agba na mkpuchi mmiri. Ọ na-eme ka rheology dịkwuo mma, na-eme ka brushability dịkwuo mma, na-enye aka na nkwụsi ike nhazi.

b. Ngwaahịa nlekọta onwe onye: HEC bụ ihe a na-ahụkarị na ngwaahịa nlekọta onwe onye dị ka shampoos, lotions na creams. Ọ na-arụ ọrụ dị ka onye na-agbapụta, stabilizer na onye na-emepụta ihe nkiri, na-eme ka arụmọrụ nke usoro ndị a dịkwuo mma.

C. Pharmaceutical: N'ime ụlọ ọrụ ọgwụ, a na-eji HEC mee ihe n'ụdị ọnụ na ọnụ. Ọ nwere ike na-eje ozi dị ka ihe nkedo, disintegrant, ma ọ bụ matriks nke bụbu na mbadamba mbadamba, yana dị ka viscosity modifier na topal gels na ude.

d. Ihe owuwu ihe: A na-eji HEC eme ihe na ụlọ ọrụ mmepụta ihe dị ka onye na-ejigide mmiri na-emepụta ihe ndị dabeere na ciment. Ọ na-eme ka arụmọrụ ihe owuwu dịkwuo mma, na-agbatị oge oghe, ma na-eme ka adhesion nke tile nrapado na ngwa agha dịkwuo elu.

e. Ụlọ ọrụ mmanụ na gas: A na-eji HEC na ụlọ ọrụ mmanụ na gas dị ka ihe na-eme ka mmiri na-egwupụta mmiri. Ọ na-enyere aka ịchịkwa viscosity ma na-enye ihe nkwusioru iji gbochie ụmụ irighiri ihe na-edozi.

F. Industrylọ ọrụ nri: A na-eji HEC na ụlọ ọrụ nri dị ka onye na-agbapụta, stabilizer na onye na-ahụ maka gelling na ngwaahịa dị iche iche, gụnyere sauces, uwe na desserts.

6. Ntụle usoro iwu:

A na-amata HEC dị ka nchekwa (GRAS) site n'aka ụlọ ọrụ na-achịkwa ma na-achịkwa ojiji ya na ngwa dị iche iche iji hụ na nchekwa ndị ahịa na ịdị mma ngwaahịa. Ndị nrụpụta ga-agbaso iwu mpaghara wee nweta nkwado dị mkpa maka ngwa ụfọdụ.

7. Ọdịnihu na ihe ọhụrụ:

Nchọpụta na-aga n'ihu na-elekwasị anya na mmepe nke ihe nrụpụta HEC gbanwetụrụ nwere ihe ndị na-akwalite maka ngwa ngwa. A na-amụba elekwasị anya na mmepụta ọhụrụ na ụzọ mmepụta ihe na-adịgide adịgide iji lebara nsogbu gburugburu ebe obibi anya ma kwalite ihe ndị ọzọ na-eme enyi gburugburu ebe obibi.

Hydroxyethylcellulose (HEC) bụ polymer na-agbanwe agbanwe, nke nwere ihe pụrụ iche dị ka mmiri solubility, ike ịgbasa, na nkwụsi ike okpomọkụ. Site na agba na mkpuchi na ụlọ ọrụ ọgwụ na nri nri, HEC na-arụ ọrụ dị mkpa n'ịkwalite arụmọrụ nke ngwaahịa dị iche iche. Ka nyocha na mmepe na-aga n'ihu, HEC nwere ike ịnọgide na-abụ isi ihe na ụlọ ọrụ dị iche iche, na-enye aka na ọganihu nke ihe na nhazi.


Oge nzipu: Dec-29-2023
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