Hydroxyethylcellulose (HEC) bụ polymer na-abụghị ionic, mmiri na-agbaze mmiri nke sitere na cellulose. Ọdịdị kemịkal ya pụrụ iche na ihe onwunwe ya na-eme ka ọ bụrụ ngwa ngwa dị iche iche n'ofe ụlọ ọrụ dịka ọgwụ, ihe ịchọ mma, nri, na nlekọta onwe onye. Otu n'ime njirimara ya ama ama bụ ọmarịcha nkwusioru ya, nke na-ekere òkè dị mkpa n'ọtụtụ nhazi.
Ọdịdị na Njirimara nke HEC
A na-enweta HEC site na cellulose, nke bụ polymer na-emekarị na mgbidi cell osisi. Site na usoro mmeghachi omume kemịkal, a na-ewebata otu hydroxyethyl n'ime ọkpụkpụ azụ cellulose, na-ebute polymer na-agbaze mmiri nwere ihe pụrụ iche.
Ọdịdị kemịkalụ: Nhazi nke cellulose nwere nkeji glucose ugboro ugboro jikọtara ya na njikọ β-1,4-glycosidic. Na HEC, a na-eji otu hydroxyethyl (-OCH2CH2OH) dochie ụfọdụ otu hydroxyl (-OH) na nkeji glucose. Ngbanwe a na-enye mmiri solubility na polima ka ọ na-ejigide usoro ọkpụkpụ azụ nke cellulose.
Mmiri Solubility: HEC bụ nke ukwuu soluble na mmiri, na-eme doro anya, viscous ngwọta. Ogo nke nnọchi (DS), nke na-egosi nkezi ọnụọgụ hydroxyethyl n'otu nkeji glucose, na-emetụta solubility polymer na ihe ndị ọzọ. Ụkpụrụ DS dị elu na-ebutekarị solubility mmiri.
Viscosity: Ngwọta HEC na-egosipụta omume pseudoplastic, nke pụtara viscosity ha na-ebelata n'okpuru nrụgide siri ike. Ngwongwo a bara uru na ngwa ndị dị ka mkpuchi na nrapado, ebe ihe dị mkpa na-agba ọsọ ngwa ngwa n'oge ngwa ma na-echekwa viscosity mgbe ị na-ezu ike.
Nhazi ihe nkiri: HEC nwere ike ịmepụta ihe nkiri na-egbuke egbuke, na-agbanwe agbanwe mgbe a mịrị amị, na-eme ka ọ dị mma maka iji mee ihe dị ka onye na-emepụta ihe nkiri na ngwa dị iche iche.
Njirimara nkwusioru nke HEC
Nkwụsịtụ na-ezo aka n'ikike nke ihe siri ike ịnọgide na-agbasasịkwa n'otu oge n'ime mmiri mmiri na-edozighị oge. HEC na-egosipụta ọmarịcha nkwusioru n'ihi ọtụtụ ihe:
Hydration na Ọzịza: Mgbe a na-agbasasị akụkụ HEC na mmiri mmiri mmiri, ha na-agbapụta ma zaa, na-eme netwọk akụkụ atọ nke na-ejide ma kwụsịtụ ihe siri ike. Ọdịdị hydrophilic nke HEC na-eme ka mmiri dị elu, na-eduga n'ịbawanye viscosity na nkwụsi ike nkwusioru.
Nkesa nha urughuru: HEC nwere ike kwụsịtụ oke nha nha nha n'ihi ikike ya ịmepụta netwọkụ nwere nha nha dị iche iche. Nke a versatility na-eme ka ọ dabara adaba maka suspending ma ọma na keadighi rarii ahụ na dị iche iche formulations.
Omume Thixotropic: Ngwọta HEC na-egosipụta omume thixotropic, nke pụtara na viscosity ha na-ebelata ka oge na-aga n'okpuru nrụgide na-adịgide adịgide ma na-agbake mgbe ewepụrụ nrụgide ahụ. Ngwongwo a na-enye ohere maka ịwụsa na ngwa ngwa dị mfe ma na-ejigide nkwụsi ike na nkwusioru nke ihe siri ike.
Nkwụsi ike pH: HEC kwụsiri ike n'ọtụtụ ụkpụrụ pH, na-eme ka ọ dabara maka ojiji na usoro acidic, nnọpụiche na alkaline na-emebighị ihe nkwusioru ya.
Ngwa nke HEC na usoro nkwusioru
Ngwongwo nkwusioru nke HEC na-eme ka ọ bụrụ ihe bara uru n'ọtụtụ ngwaahịa n'ofe ụlọ ọrụ dị iche iche:
Agba na mkpuchi: A na-eji HEC mee ihe dị ka onye na-ekpo ọkụ na ihe nkwụsịtụ na agba na mkpuchi mmiri iji gbochie nhazi nke pigmenti na ihe mgbakwunye. Omume pseudoplastic ya na-eme ka ngwa dị nro na mkpuchi otu.
Ngwaahịa nlekọta onwe onye: Na shampoos, ịsacha ahụ, na ngwaahịa nlekọta onwe onye ọzọ, HEC na-enyere aka kwụsịtụ ihe ndị dị ka exfoliants, pigmenti, na beads na-esi ísì ụtọ, na-ahụ na ọbụna nkesa na nkwụsi ike nke nhazi ahụ.
Usoro ọgwụ: HEC na-arụ ọrụ na nkwusioru ọgwụ iji kwụsịtụ ihe ndị na-arụ ọrụ ma melite palatability na nkwụsi ike nke ụdị usoro onunu ogwu. Ndakọrịta ya na ọtụtụ API (Active Pharmaceutical Ingredients) na ihe ndị na-eme ka ọ bụrụ nhọrọ kacha amasị maka ndị na-emepụta ihe.
Ngwa nri na ihe ọṅụṅụ: A na-eji HEC na ngwa nri dị ka mgbakwasa salad, sauces, na ihe ọṅụṅụ iji kwụsịtụ ihe ndị na-adịghị edozi dị ka herbs, ngwa nri, na pulp. Ọdịdị ya na-enweghị isi na enweghị ụtọ na-eme ka ọ dị mma iji mee ihe na nhazi nri na-enweghị emetụta àgwà mmetụta.
Hydroxyethylcellulose (HEC) bụ polymer vasatail nwere ihe nkwusioru pụrụ iche, na-eme ka ọ bụrụ ihe bara uru n'ọtụtụ usoro nhazi n'ofe ụlọ ọrụ. Ikike ya ịkwụsị irighiri ihe siri ike ọbụlagodi na mgbasa ozi mmiri mmiri, yana njiri mara ndị ọzọ dị ka solubility mmiri, njikwa viscosity, na nkwụsi ike pH, na-eme ka ọ dị mkpa maka ndị na-emepụta ihe na-achọ inweta ngwaahịa kwụsiri ike ma dị elu. Ka nyocha na mmepe na-aga n'ihu na-aga n'ihu, a na-atụ anya na ngwa HEC na usoro nkwusioru ga-abawanyewanye, na-ebuwanye ihe ọhụrụ na ịkwalite arụmọrụ ngwaahịa na mpaghara dị iche iche.
Oge nzipu: Mee-09-2024