Ka ʻike ʻana i ka maikaʻi o ka cellulose ether

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 cellulose ethers i ke ʻano, ka helu a me ka hoʻolaha ʻana o nā substituents. Hoʻokaʻawale ʻia hoʻi ka hoʻokaʻawale ʻana o ka cellulose ether e like me ke ʻano o ka substituent, 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. ʻO ka MC a mākou e hoʻohana pinepine ai he monoether, a ʻo ka HPMC 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 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 aila. 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 ʻike ʻana i ka maikaʻi o ka cellulose ether:

Ka hopena o ka ʻike methoxyl ma ka maikaʻi: ka paʻa ʻana o ka wai a me ka hana mānoanoa

Ka hopena o ka maikaʻi o ka ʻike hydroxyethoxyl/hydroxypropoxyl: ʻo ke kiʻekiʻe o ka ʻike, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai.

Ka hopena o ka maikaʻi o ka viscosity: ʻo ke kiʻekiʻe o ... ka polymerization, ʻo ke kiʻekiʻe o ka viscosity a ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai.

ʻO ka hopena o ka maikaʻi o ka fineness: ʻo ka ʻoi aku ka maikaʻi o ka hoʻopuehu ʻana a me ka hoʻoheheʻe ʻana i loko o ka mortar, ʻoi aku ka wikiwiki a me ke ʻano like, a ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai pili

Ka hopena maikaʻi o ka hoʻoili ʻana o ka mālamalama: ʻo ke kiʻekiʻe o ke kiʻekiʻe o ka polymerization, ʻoi aku ka like o ke kiʻekiʻe o ka polymerization, a me ka emi ʻana o nā haumia

Ka hopena o ka maikaʻi o ka mahana o ka gel: ʻo ka mahana o ka gel no ke kūkulu ʻana ma kahi o 75°C

Ka hopena o ka maikaʻi o ka wai: <5%, maʻalahi ka cellulose ether e omo i ka makū, no laila pono e hoʻopaʻa ʻia a mālama ʻia

Ka hopena o ka maikaʻi o ka lehu: <3%, ʻo ke kiʻekiʻe o ka lehu, ʻoi aku ka nui o nā haumia

Ka hopena maikaʻi o ka waiwai PH: kokoke i ke kūlike ʻole, loaʻa i ka cellulose ether ka hana paʻa ma waena o PH: 2-11