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-ekpo ọkụ.Ọ na-enyere aka ịchịkwa viscosity ma na-enye ihe nkwụsịtụ iji gbochie 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 eji eme ka ọ dịkwuo mma 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