ʻO ka Cellulose ether kahi polymer synthetic i hana ʻia mai ka cellulose kūlohelohe ma o ka hoʻololi kemika. ʻO ka Cellulose ether kahi derivative o ka cellulose kūlohelohe. ʻOkoʻa ka hana ʻana o ka cellulose ether mai nā polymers synthetic. ʻO kāna mea kumu nui loa ʻo cellulose, kahi hui polymer kūlohelohe. Ma muli o ke ʻano kūikawā o ke ʻano cellulose kūlohelohe, ʻaʻohe hiki o ka cellulose ponoʻī ke hana me nā mea etherification. Eia naʻe, ma hope o ka mālama ʻana i ka mea pehu, ua luku ʻia nā pilina hydrogen ikaika ma waena o nā kaulahao molekala a me nā kaulahao, a lilo ka hoʻokuʻu ikaika o ka hui hydroxyl i cellulose alkali reactive. E kiʻi i ka cellulose ether.
Aia nā waiwai o nā ethers cellulose i ke ʻano, ka helu a me ka hoʻolaha ʻana o nā substituents. Hoʻokumu ʻia ka hoʻokaʻawale ʻana o nā ethers cellulose ma ke ʻano o nā substituents, ke kekelē o ka etherification, ka solubility a me nā waiwai noi pili. Wahi a ke ʻano o nā substituents ma ke kaulahao molekala, hiki ke hoʻokaʻawale ʻia i monoether a me ka ether hui ʻia. Hoʻohana pinepine mākou iā mc ma ke ʻano he monoether, a ʻo HPmc ma ke ʻano he ether hui ʻia. ʻO Methyl cellulose ether mc ka huahana ma hope o ka hui hydroxyl ma ka ʻāpana glucose o ka cellulose kūlohelohe i pani ʻia e ka hui methoxy. He huahana ia i loaʻa ma ke pani ʻana i kahi ʻāpana o ka hui hydroxyl ma ka ʻāpana me kahi hui methoxy a me kekahi ʻāpana me kahi hui hydroxypropyl. ʻO ke ʻano hoʻonohonoho ʻo [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEmc, ʻo ia nā ʻano nui i hoʻohana nui ʻia a kūʻai ʻia ma ka mākeke.
Ma ke ʻano o ka solubility, hiki ke hoʻokaʻawale ʻia i ionic a me non-ionic. ʻO nā ether cellulose non-ionic wai-soluble ʻia i haku ʻia me ʻelua mau moʻo o alkyl ethers a me hydroxyalkyl ethers. Hoʻohana nui ʻia ka Ionic Cmc i nā detergents synthetic, ka paʻi ʻana a me ka hoʻoluʻu ʻana i ka lole, ka ʻimi ʻana i ka meaʻai a me ka ʻaila. Hoʻohana nui ʻia ka non-ionic mc, HPmc, HEmc, a pēlā aku i nā mea kūkulu hale, nā uhi latex, nā lāʻau lapaʻau, nā kemika o kēlā me kēia lā, a pēlā aku. Hoʻohana ʻia ma ke ʻano he thickener, mea paʻa wai, mea hoʻopaʻa, mea hoʻolaha a me ka mea hana kiʻiʻoniʻoni.
Ka manawa hoʻouna: Nov-24-2022