nūhou

ʻO ke kumu, hiki ke hoʻemi ʻia ke kaʻina hana o nā kaʻa a pau i hoʻohui ʻia e Fischer me nā alkyl glycosides i ʻelua ʻano kaʻina hana, ʻo ia hoʻi, ka synthesis pololei a me ka transacetalization. I nā hihia ʻelua, hiki ke hoʻomau ʻia ka hopena i nā pūʻulu a hoʻomau paha.
Ma lalo o ka synthesis pololei, hoʻopili pololei ka carbohydrate me ka waiʻona momona e hana i ka polyglycoside alkyl kaulahao lōʻihi. Hoʻomaloʻo pinepine ʻia ka waiʻona i hoʻohana ʻia ma mua o ka hopena maoli (no ka laʻana e wehe i ka wai aniani i ka hihia o ka glucose monohydrate=dextrose). ʻO kēia kaʻina hoʻomaloʻo e hōʻemi i nā hopena ʻaoʻao i hana ʻia i mua o ka wai.
Ma ka hoʻopili pololei, hoʻohana ʻia ka monomer solid glucose type e like me ka paʻa paʻa paʻa.
Hiki ke hoʻololi i ka syrup glucose i hoʻohaʻahaʻa loa ʻia (DE>96; DE=Dextrose equivalents). ʻO ka hoʻohana ʻana i kahi mea hoʻoheheʻe ʻelua a/a i ʻole emulsifiers (e laʻa ka alkyl polyglycoside) e hāʻawi i ka hoʻopuehu maikaʻi-droplet paʻa ma waena o ka waiʻona a me ka syrup glucose.
Pono ke kaʻina hana transacetalization ʻelua ma mua o ka synthesis pololei. I ka pae mua, hana ka waiʻona me ka waiʻona kaulahao pōkole (no ka laʻana, n-butanol a propylene glycol) a koho ʻia nā-menzes. I ka lua o ka pae, ua transacetalized ka alkyl glycoside kaulahao pōkole me ka waiʻona kaulahao lōʻihi e hana i ka polyglycoside alkyl pono. Inā like ka lakio molar o ka waiʻona i ka waiʻona, ʻo ka puʻunaue oligomer i loaʻa i ke kaʻina o ka transacetalization ua like nō ia me ka mea i loaʻa i ka synthesis pololei.
Inā hoʻohana ʻia ka oligo-a me nā polyglycoses (e like me ka starch, syrups me ka waiwai DE haʻahaʻa), hoʻohana ʻia ke kaʻina transacetalization. Pono ka depolymerization pono o kēia mau mea hoʻomaka i ka mahana o> 140 ℃. Ma muli o ka waiʻona i hoʻohana ʻia, hiki i kēia ke hana i nā koʻikoʻi kiʻekiʻe aʻe e koi ai i nā koi ikaika i nā mea hana a hiki ke alakaʻi i ke kumu kūʻai kiʻekiʻe. Ma ka laulā, ma ka mana like, ʻoi aku ka nui o ke kaʻina hana transacetalization ma mua o ka synthesis pololei. ma waho aʻe o nā ʻanuʻu pane ʻelua, pono e hāʻawi ʻia nā keʻena mālama ʻē aʻe, a me nā keʻena hana koho no nā ʻawaʻawa pōkole. Ma muli o nā haumia kūikawā i loko o ka starch (e like me nā protein), pono e hoʻomaʻemaʻe ʻia nā alkyl glycosides. Ma kahi kaʻina hana transacetalization maʻalahi, hiki i nā syrups me kahi kiʻekiʻe glucose maʻi (DE> 96%) a i ʻole nā ​​​​ʻano glucose paʻa hiki ke hana me nā ʻawaʻawa pōkole ma lalo o ke kaomi maʻamau, ua hoʻomohala ʻia nā kaʻina hana ma kēia kumu. (Hōʻike ke kiʻi 3 i nā ala synthesis no nā alkyl polyglycosides)
Kiʻi 3. Alkyl polyglycoside surfactants-ʻoihana synthesis ala


Ka manawa hoʻouna: Sep-29-2020