ʻO ka starch ether a me ka cellulose ether nā ʻano ʻelua o nā derivatives ether i hoʻohana ʻia i nā ʻoihana like ʻole, ʻoi aku hoʻi i ke kūkulu ʻana a me nā uhi ʻana. ʻOiai ke kaʻana like nei lākou i kekahi mau ʻano like ma ke ʻano he mau polymers wai-soluble me nā waiwai mānoanoa a me ka hoʻopaʻa ʻana, aia nā ʻokoʻa nui ma waena o lākou, ʻo ia hoʻi ma ko lākou kumu a me ke ʻano kemika.
ʻEtera Mānoanoa:
1. Puna:
- Kumu Kūlohelohe: Loaʻa ka starch ether mai ka starch, he kalapona ia i loaʻa i nā mea kanu. Hoʻohui pinepine ʻia ka starch mai nā mea kanu e like me ka kulina, ka ʻuala, a i ʻole ka cassava.
2. ʻAno Kemika:
- Ka Hoʻohuihui Polymer: ʻO ka Starch kahi polysaccharide i haku ʻia me nā ʻāpana glucose i hoʻopili ʻia e nā pilina glycosidic. ʻO nā ethers Starch nā mea i hoʻololi ʻia o ka starch, kahi i pani ʻia ai nā hui hydroxyl ma ka molekole starch me nā hui ether.
3. Nā noi:
- ʻOihana Kūkulu: Hoʻohana pinepine ʻia nā ethers starch i ka ʻoihana kūkulu ma ke ʻano he mea hoʻohui i nā huahana gypsum, nā mortars, a me nā mea hana sima. Hāʻawi lākou i ka hoʻomaikaʻi ʻana i ka hana, ka paʻa ʻana o ka wai, a me ka hoʻopili ʻana.
4. Nā ʻAno Maʻamau:
- Hydroxyethyl Starch (HES): ʻO kahi ʻano maʻamau o ka starch ether ʻo ia ka hydroxyethyl starch, kahi i hoʻokomo ʻia ai nā hui hydroxyethyl e hoʻololi i ke ʻano o ka starch.
ʻEtera Cellulose:
1. Puna:
- Kumu Kūlohelohe: Loaʻa ka cellulose ether mai ka cellulose, kahi polymer kūlohelohe i loaʻa i loko o nā paia cell o nā mea kanu. He ʻāpana nui ia o nā paia cell mea kanu a ua unuhi ʻia mai nā kumu e like me ka pulp lāʻau a i ʻole ka pulupulu.
2. ʻAno Kemika:
- Ka Hoʻohuihui Polymer: ʻO ka Cellulose kahi polymer linear i haku ʻia me nā ʻāpana glucose i hoʻopili ʻia e nā pilina β-1,4-glycosidic. ʻO nā cellulose ethers he mau mea i loaʻa mai ka cellulose, kahi i hoʻololi ʻia ai nā hui hydroxyl ma ka molekole cellulose me nā hui ether.
3. Nā noi:
- ʻOihana Kūkulu: Loaʻa ka hoʻohana nui ʻia ʻana o nā cellulose ethers i ka ʻoihana kūkulu, e like me nā starch ethers. Hoʻohana ʻia lākou i nā huahana sima, nā mea hoʻopili tile, a me nā mortars e hoʻoikaika i ka paʻa ʻana o ka wai, ka hana, a me ka hoʻopili ʻana.
4. Nā ʻAno Maʻamau:
- Hydroxyethyl Cellulose (HEC): ʻO kahi ʻano maʻamau o ka cellulose ether ʻo ia ka hydroxyethyl cellulose, kahi i hoʻokomo ʻia ai nā hui hydroxyethyl e hoʻololi i ke ʻano o ka cellulose.
- Methyl Cellulose (MC): ʻO kekahi ʻano maʻamau ʻo ia ka methyl cellulose, kahi i hoʻolauna ʻia ai nā hui methyl.
Nā ʻokoʻa koʻikoʻi:
1. Puna:
- Loaʻa ka starch ether mai ka starch, kahi kalapona i loaʻa i nā mea kanu.
- Loaʻa ka cellulose ether mai ka cellulose, kahi ʻāpana nui o nā paia o nā cell mea kanu.
2. ʻAno Kemika:
- ʻO ka polymer kumu no ka starch ether he starch, he polysaccharide i haku ʻia me nā ʻāpana glucose.
- ʻO ka polymer kumu no ka cellulose ether he cellulose, he polymer linear i haku ʻia me nā ʻāpana glucose.
3. Nā noi:
- Hoʻohana ʻia nā ʻano ethers ʻelua i ka ʻoihana kūkulu hale, akā ʻokoʻa paha nā noi a me nā ʻano hana kikoʻī.
4. Nā ʻAno Maʻamau:
- ʻO ka hydroxyethyl starch (HES) a me ka hydroxyethyl cellulose (HEC) he mau laʻana o kēia mau mea i loaʻa mai ka ether.
ʻoiai ʻo ka starch ether a me ka cellulose ether he mau polymers wai-soluble i hoʻohana ʻia ma ke ʻano he mau mea hoʻohui i nā noi like ʻole, ʻokoʻa ko lākou kumu, polymer kumu, a me nā ʻano kemika kikoʻī. Hiki i kēia mau ʻokoʻa ke hoʻololi i kā lākou hana i nā ʻano hana a me nā noi kikoʻī.
Ka manawa hoʻouna: Ian-06-2024