Nkwadebe na ihe anụ ahụ nke hydroxypropyl starch ether

A na-akwado Hydroxypropyl starch ether (HPStE) site na usoro mgbanwe kemịkalụ nke gụnyere iwebata otu hydroxypropyl na molekul starch. Usoro nkwadebe na-agụnyekarị usoro ndị a:

1. Nhọrọ Starch: A na-ahọrọ starch dị oke mma, nke sitere na isi mmalite dị ka ọka, ọka wit, poteto, ma ọ bụ tapioca, ka a na-ahọpụta. Nhọrọ nke isi iyi starch nwere ike imetụta njirimara nke ngwaahịa HPStE ikpeazụ.
2. Nkwadebe nke Starch Tapawa: A na-agbasasị starch ahọpụtara n'ime mmiri iji mepụta stachi starch. A na-ekpo ọkụ na tapawa ahụ ka ọ bụrụ ọnọdụ okpomọkụ ka ọ bụrụ gelatinize granules starch, na-enye ohere maka mmeghachi omume ka mma na ntinye nke reagents na usoro mgbanwe ndị na-esote.
3. Mmeghachi omume Etherification: A na-emezi pasta starch gelatinized na propylene oxide (PO) n'ihu onye na-eme ihe n'okpuru ọnọdụ a na-achịkwa. Propylene oxide na-emeghachi omume na otu hydroxyl (-OH) na molekul starch, na-ebute ntinye nke otu hydroxypropyl (-OCH2CH (OH) CH3) na ọkpụkpụ starch.
4. Neutralization na ịdị ọcha: Mgbe mmeghachi omume etherification gasịrị, a na-ewepụ ngwakọta mmeghachi omume iji wepụ ihe ọ bụla reagents ma ọ bụ ihe mkpali. A na-asachapụ hydroxypropyl starch ether nke si na ya pụta site na usoro dị ka nzacha, ịsacha na ihicha iji wepụ ihe adịghị ọcha na kemịkalụ fọdụrụnụ.
5. Ndozi nha urughuru: Njirimara anụ ahụ nke HPStE, dị ka nha na nkesa, enwere ike gbanwee site na igwe igwe ma ọ bụ usoro egweri iji nweta njirimara achọrọ maka ngwa akọwapụtara.

Njirimara anụ ahụ nke hydroxypropyl starch ether nwere ike ịdịgasị iche dabere n'ihe ndị dị ka ogo nke nnọchi (DS), ịdị arọ molecular, nha urughuru, na ọnọdụ nhazi. Ụfọdụ ihe onwunwe nkịtị nke HPSTE gụnyere:

1. Ọdịdị: HPStE na-abụkarị ntụ ntụ na-acha ọcha ma na-acha ọcha nwere nkesa nha nha nke ọma. Ụdị morphology nke urughuru nwere ike ịdị iche site na okirikiri gaa na ụdị oge ọ bụla dabere na usoro nrụpụta.
2. Oke urughuru size: The urughuru size nke HPStE nwere ike mbio site a ole na ole micrometers na iri nke micrometers, na a ịrịba mmetụta na ya dispersibility, solubility, na ọrụ dị iche iche ngwa.
3. Njupụta buru ibu: Nnukwu njupụta nke HPStE na-emetụta njiri ike ya, njirimara njikwa ya na ihe achọrọ. A na-atụkarị ya na gram kwa cubic centimita (g/cm³) ma ọ bụ kilogram kwa lita (kg/L).
4. Solubility: HPStE bụ ihe a na-adịghị ahụkebe na mmiri oyi mana ọ nwere ike ịgbasa na zaa na mmiri ọkụ, na-akpụ ngwọta viscous ma ọ bụ gels. Njirimara solubility na hydration nke HPStE nwere ike ịdịgasị iche dabere n'ihe ndị dị ka DS, arọ molecular, na okpomọkụ.
5. Viscosity: HPStE na-egosiputa ihe njiri na njikwa rheological na sistemu mmiri, na-emetụta viscosity, omume ịgba ọsọ, na nkwụsi ike nke usoro. Viscosity nke ngwọta HPStE na-adabere na ihe ndị dị ka itinye uche, okpomọkụ, na ọnụ ọgụgụ isi.
6. Ọnụọgụ hydration: Ọnụego hydration nke HPStE na-ezo aka na ọnụego ọ na-amịkọrọ mmiri ma zaa iji mepụta ngwọta viscous ma ọ bụ gels. Ihe onwunwe a dị mkpa na ngwa ebe a na-achọ ngwa ngwa hydration na thickening.

A na-ahazi nkwadebe na ihe anụ ahụ nke hydroxypropyl starch ether iji mezuo ihe achọrọ ngwa ngwa na njirisi arụmọrụ, na-eme ka ọ bụrụ ihe mgbakwunye bara uru na nke bara uru na ụlọ ọrụ na nhazi dị iche iche.