Starch ether ndi cellulose ether ndi mitundu yonse ya ether yomwe imagwiritsidwa ntchito m'mafakitale osiyanasiyana, makamaka pomanga ndi zokutira. Ngakhale amagawana zofanana pakukhala ma polima osungunuka m'madzi okhala ndi zinthu zokhuthala komanso zokhazikika, pali kusiyana kwakukulu pakati pawo, makamaka pamagwero awo komanso kapangidwe kake ka mankhwala.
Ether wowuma:
1. Gwero:
- Chiyambi Chachilengedwe: Wowuma ether amachokera ku wowuma, womwe ndi chakudya chomwe chimapezeka muzomera. Wowuma nthawi zambiri amatengedwa ku mbewu monga chimanga, mbatata, kapena chinangwa.
2. Kapangidwe ka Chemical:
- Mapangidwe a Polima: Wowuma ndi polysaccharide wopangidwa ndi mayunitsi a shuga olumikizidwa ndi ma glycosidic bond. Ma ethers owuma amasinthidwa kuchokera ku wowuma, pomwe magulu a hydroxyl pa molekyulu ya wowuma amalowetsedwa ndi magulu a ether.
3. Mapulogalamu:
- Makampani Omanga: Ma ethers owuma amagwiritsidwa ntchito nthawi zambiri m'makampani omanga monga zowonjezera pazinthu zopangidwa ndi gypsum, matope, ndi zida za simenti. Amathandizira kuwongolera magwiridwe antchito, kusunga madzi, komanso kumamatira.
4. Mitundu Yodziwika:
- Hydroxyethyl Starch (HES): Mtundu umodzi wodziwika wa starch ether ndi hydroxyethyl starch, pomwe magulu a hydroxyethyl amayambitsidwa kuti asinthe mawonekedwe a wowuma.
Selulosi Ether:
1. Gwero:
- Chiyambi Chachilengedwe: Ma cellulose ether amachokera ku cellulose, polima wachilengedwe wopezeka m'makoma a cellulose. Ndi gawo lalikulu la makoma a cell cell ndipo amachotsedwa kuzinthu monga zamkati zamatabwa kapena thonje.
2. Kapangidwe ka Chemical:
- Mapangidwe a Polima: Ma cellulose ndi polima mzere wokhala ndi mayunitsi a shuga omwe amalumikizidwa ndi ma β-1,4-glycosidic bond. Ma cellulose ethers ndi ochokera ku cellulose, pomwe magulu a hydroxyl pa molekyulu ya cellulose amasinthidwa ndi magulu a ether.
3. Mapulogalamu:
- Makampani Omanga: Ma cellulose ethers amagwiritsidwa ntchito kwambiri pantchito yomanga, ofanana ndi ma starch ethers. Amagwiritsidwa ntchito popanga zinthu zopangidwa ndi simenti, zomatira matailosi, ndi matope kuti apititse patsogolo kusunga madzi, kugwira ntchito, ndi kumamatira.
4. Mitundu Yodziwika:
- Hydroxyethyl Cellulose (HEC): Mtundu umodzi wodziwika wa cellulose ether ndi hydroxyethyl cellulose, pomwe magulu a hydroxyethyl amayambitsidwa kuti asinthe kapangidwe ka cellulose.
- Methyl Cellulose (MC): Mtundu wina wodziwika ndi methyl cellulose, pomwe magulu a methyl amayambitsidwa.
Kusiyana Kwakukulu:
1. Gwero:
- Wowuma ether amachokera ku wowuma, chakudya chomwe chimapezeka muzomera.
- Cellulose ether imachokera ku cellulose, chigawo chachikulu cha makoma a zomera.
2. Kapangidwe ka Chemical:
- Polima woyambira wa starch ether ndi wowuma, polysaccharide wopangidwa ndi mayunitsi a shuga.
- Polima woyambira wa cellulose ether ndi cellulose, polima mzere wopangidwa ndi mayunitsi a shuga.
3. Mapulogalamu:
- Mitundu yonse iwiri ya ma ether imagwiritsidwa ntchito pomanga, koma ma ether enieni ndi mapangidwe ake amatha kusiyana.
4. Mitundu Yodziwika:
- Hydroxyethyl starch (HES) ndi hydroxyethyl cellulose (HEC) ndi zitsanzo za zotumphukira za ether.
pomwe wowuma ether ndi cellulose ether onse ndi ma polima osungunuka m'madzi omwe amagwiritsidwa ntchito ngati zowonjezera pazogwiritsa ntchito zosiyanasiyana, gwero lawo, polima yoyambira, ndi kapangidwe kake ka mankhwala amasiyana. Kusiyanaku kungakhudze momwe amagwirira ntchito m'mapangidwe apadera ndi kagwiritsidwe ntchito.
Nthawi yotumiza: Jan-06-2024