He aha ka Hydroxypropyl Starch Ether?

ʻO ka hydroxypropyl starch ether (HPS) he starch i hoʻololi ʻia i lilo i mea kaulana i nā ʻoihana like ʻole ma ke ʻano he mea mānoanoa, hoʻopaʻa, a emulsifying. He mea hoʻoheheʻe wai hoʻoheheʻe wai i loaʻa mai ka kulina maoli, ka ʻuala, a i ʻole ka tapioka starch ma o ke kaʻina hana hoʻololi kemika e pili ana i ka hoʻokomo ʻana o nā pūʻulu hydroxypropyl i nā molekole starch.

Ua kaulana ka hoʻohana ʻana i ka HPS i ka ʻoihana meaʻai ma muli o ka hoʻomaikaʻi ʻana i ke ʻano, ka waha, a me ke ola o nā huahana meaʻai he nui. Hoʻohana maʻamau ia i ka soup, sauces, gravies, puddings, a me nā huahana ʻē aʻe e pono ai ka mānoanoa a i ʻole ke kūpaʻa. Hoʻohana pū ʻia ʻo HPS i ka ʻoihana lāʻau lapaʻau e hoʻomaikaʻi i ka lawe ʻana i ka lāʻau lapaʻau, a me nā mea hoʻonaninani a me nā huahana mālama pilikino e like me nā shampoos, lotions, a me nā ʻaila.

Ma kēia ʻatikala, e ʻimi mākou i nā waiwai, kaʻina hana, nā noi, a me nā noʻonoʻo palekana o HPS.

Nā waiwai o ka Hydroxypropyl Starch Etera

ʻO ka hydroxypropyl starch ether he pauka keʻokeʻo, ʻala ʻole, a ʻono ʻole i hiki ke hoʻoheheʻe ʻia i ka wai a me nā mea hoʻoheheʻe polar ʻē aʻe. Loaʻa iā ia ke kaumaha molekala mai 1,000 a 2,000,000 Daltons, ma muli o ke ʻano o ka hoʻololi ʻana o nā hui hydroxypropyl. ʻO ke degere o ka hoʻololi ʻana (DS) e pili ana i ka helu awelika o nā pūʻulu hydroxypropyl no kēlā me kēia ʻāpana anhydroglucose (AGU) i loko o ka mole mole starch. Loaʻa ka DS kiʻekiʻe i kahi mole HPS hydrophilic a hiki ke hoʻoheheʻe ʻia i ka wai.

Loaʻa ka HPS ma nā māka like ʻole, ma muli o kona viscosity, ka nui o nā ʻāpana, a me nā waiwai ʻē aʻe. Hōʻike pinepine ʻia ka viscosity o HPS ma ke ʻano o kona ʻano viscosity Brookfield, i ana ʻia ma ke centipoise (cP) ma kahi kikoʻī a me ka mahana. Hoʻohana ʻia nā māka HPS kiʻekiʻe-viscosity no nā huahana ʻoi aku ka mānoanoa, ʻoiai hoʻohana ʻia nā māka haʻahaʻa-viscosity no nā huahana ʻoi aku ka lahilahi.

He waiwai koʻikoʻi ka nui o ka ʻāpana o ka HPS, no ka mea e pili ana i kona dispersibility a me ka flowability. Loaʻa ka HPS i nā ʻāpana like ʻole, mai nā pauka maikaʻi a hiki i nā granule, e pili ana i ka noi.

Ka Hana Hana o Hydroxypropyl Starch Etera

ʻO ka hana ʻana o ka HPS e pili ana i ka hoʻololi ʻana i ka starch maoli me ka hoʻohana ʻana i ka hopena ma waena o ka starch a me ka propylene oxide (PO), kahi e hoʻokomo ai i nā pūʻulu hydroxypropyl i nā molekole starch. Hoʻokomo pinepine ʻia ke kaʻina hana i loko o kahi hopena alkaline wai, me ka hoʻohui ʻana o kahi catalyst e like me ka sodium hydroxide a i ʻole potassium hydroxide.

Hoʻololi ʻia ke kaʻina hana hoʻololi e kekahi mau mea, e like me ka manawa pane, ka mahana, ka pH, ka ratio PO/starch, a me ka hoʻokele catalyst. Hoʻopili kēia mau mea i ke kiʻekiʻe o ka hoʻololi ʻana, ke kaumaha molekala, a me nā waiwai ʻē aʻe o ka huahana HPS i hopena.

Holoi ʻia ka starch i hoʻololi ʻia, hoʻokaʻawale ʻia, a maloʻo no ka loaʻa ʻana o ka pauka keʻokeʻo a i ʻole granules. A laila hoʻāʻo ʻia ka huahana HPS no nā waiwai like ʻole e like me ka viscosity, ka nui o ka ʻāpana, ka ʻoluʻolu, a me ka maʻemaʻe.

Nā noi o ka Hydroxypropyl Starch Ether

ʻO ka hoʻohanaʻana i ka HPS i ke kūkuluʻana he mea maikaʻi ia ma nāʻano likeʻole, e like me ka hoʻomaikaʻiʻana i ka ikaika a me ka lōʻihi o ke konima, ka ho'ēmiʻana i ka wai, a me ka hoʻonuiʻana i ka pili a me ka huiʻana o nā morta. ʻO kekahi o nā noi maʻamau o HPS i ke kūkulu ʻana:

1. Paʻakū:

Hoʻohana ʻia ʻo HPS i loko o ke kaila ma ke ʻano he mea hoʻemi wai, e hōʻemi ana i ka nui o ka wai e pono ai no kahi hoʻolālā hui. ʻO kēia ka hopena i ka ikaika kiʻekiʻe a me ka lōʻihi o ke koʻikoʻi, no ka mea, hiki i ka wai ke hoʻonāwaliwali i ka ʻōpala a hoʻoulu i nā māwae. Hoʻomaikaʻi pū ʻo HPS i ka hiki ke hana a me ka kahe ʻana o ke koneki, he mea pono i nā papahana nui.

2. Moka:

Hoʻohana ʻia ʻo HPS i ka mortar ma ke ʻano he plasticizer, kahi e hoʻomaikaʻi ai i ka hana a me ke kūlike o ka mortar. ʻO kēia ka hopena i kahi pilina maikaʻi ma waena o ka mortar a me nā ʻāpana masonry, he mea nui ia no ka paʻa o ka hale. Hoʻemi pū ʻo HPS i ka wai i loko o ka pahū, kahi e hoʻomaikaʻi ai i kona ikaika a paʻa.

3. Nā huahana Gypsum:

Hoʻohana ʻia ʻo HPS i nā huahana gypsum e like me ka plaster a me ka hui hui e like me ka mānoanoa a me ka stabilizer. ʻO kēia ka hopena i ka hoʻohana ʻana i nā huahana gypsum, a me ka hoʻopili maikaʻi ʻana a me ka cohesion. Hoʻomaikaʻi pū ʻo HPS i ka manawa hoʻonohonoho a me ka ikaika o nā huahana gypsum, he mea pono i nā noi kūkulu.

Ma waho aʻe o nā noi i luna, hiki ke hoʻohana ʻia ka HPS i nā mea kūkulu hale ʻē aʻe e like me nā uhi, nā mea hoʻopili, a me nā sealants. Hiki i ka hoʻohana ʻana i ka HPS i ke kūkulu ʻana ke hoʻomaikaʻi i ka maikaʻi, ka maikaʻi, a me ka hoʻomau ʻana o nā papahana kūkulu, a me ka hoʻemi ʻana i nā kumukūʻai a me nā ʻōpala.