Kedu ihe bụ hydroxypropyl starch ethers?

Hydroxypropyl starch ethers (HPStEs) bụ ihe mgbaze starch enwetara site na ngbanwe kemịkalụ nke ụmụ irighiri starch eke, na-esite na isi mmalite dịka ọka, ọka wit, poteto, ma ọ bụ tapioca. A na-emepụta HPStE site na iwebata otu hydroxypropyl n'ime ọkpụkpụ starch site na mmeghachi omume etherification.

Usoro kemịkalụ nke hydroxypropyl starch ethers mejupụtara ụmụ irighiri ihe starch nwere hydroxypropyl (-OCH2CH (OH) CH3) nke jikọtara na otu ọrụ hydroxyl (-OH) n'akụkụ eriri starch polymer. Ogo ngbanwe (DS), nke na-ezo aka na nkezi ọnụọgụ hydroxypropyl dị iche iche nke etinyere n'otu glucose nke molekul starch, nwere ike ịdịgasị iche dabere na ọnọdụ mmeghachi omume yana njirimara achọrọ nke ngwaahịa ikpeazụ.

HPStE na-achacha ọcha na ntụ ntụ na-acha ọcha nwere ụdị anụ ahụ dị iche iche dị ka nha urughuru, njupụta buru ibu, solubility, na viscosity, nke enwere ike ịhazi ya na ngwa ngwa na ihe nhazi chọrọ. Ha na-esighi ike na mmiri oyi mana ha nwere ike ịgbasa ma zaa na mmiri ọkụ, na-emepụta ngwọta viscous ma ọ bụ gels.

Hydroxypropyl starch ethers na-egosipụta ọtụtụ ihe ndị a na-achọsi ike na-eme ka ha bụrụ ihe mgbakwunye bara uru n'ọtụtụ ngwa ụlọ ọrụ na azụmahịa:

1. Njide mmiri: HPStE nwere ihe njigide mmiri dị elu, na-eme ka ọ bụrụ ihe na-eme ka ọ dị mma na-ekekọta ya na nhazi dị ka adhesives, mkpuchi, na ihe owuwu. Ha na-enyere aka melite arụmọrụ, hydration, na nrapado nke ihe ndị a.
2. Ọkpụkpụ: HPStE na-arụ ọrụ dị ka ihe na-eme ka ọ dị mma na sistemu mmiri, na-abawanye viscosity na nkwekọ nke usoro dị ka agba, nrapado, na ngwaahịa nlekọta onwe onye. Ha na-enye udidi, nkwụsi ike, na mgbasawanye na usoro ndị a.
3. Nhazi ihe nkiri: HPStE nwere ike ịmepụta ihe nkiri na-egbuke egbuke ma na-agbanwe agbanwe mgbe a gbasasịrị na mmiri, na-eme ka ha baa uru na mkpuchi, ihe nkiri, na ngwa nkwakọ ngwaahịa. Ha na-emezi mmepụta ihe nkiri, nrapado, na ihe mgbochi, na-eme ka arụmọrụ na ịdịte aka nke ngwaahịa ikpeazụ.
4. Nkwụsi ike: HPStE na-egosipụta nkwụsi ike dị mma na sistemu mmiri, na-egbochi nkewa nke oge, sedimentation, ma ọ bụ coagulation nke ụmụ irighiri ihe. Ha na-enyere aka ịnọgide na-enwe otu na nkwụsi ike na usoro dị ka emulsions, suspensions, na dispersions.
5. Biodegradability: A na-enweta HPStE site na isi mmalite starch eke ma bụrụ ihe a na-emebi emebi, na-eme ka ha bụrụ enyi na gburugburu ebe obibi na ihe na-adigide maka mgbakwunye sịntetik na ngwa dị iche iche.
6. Ndakọrịta: HPStE dakọtara na ọtụtụ ihe ndị ọzọ na ihe mgbakwunye ndị a na-ejikarị eme ihe. Enwere ike itinye ha ngwa ngwa n'ime usoro iji nweta ihe ndị a chọrọ na njirimara arụmọrụ.

N'ozuzu, hydroxypropyl starch ethers na-enye mgbanwe, ịrụ ọrụ, na nkwado, na-eme ka ha bụrụ ihe mgbakwunye dị mkpa na ụlọ ọrụ dịka ihe owuwu, ihe mkpuchi, mkpuchi, nlekọta onwe onye, ​​nri, na ọgwụ. Ngwongwo ha na ngwa ha dị iche iche na-atụnye aka n'ịkwalite arụmọrụ, ịrụ ọrụ na nkwado gburugburu ebe obibi n'akụkụ dị iche iche.