ʻO ka ʻike 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 hua o ka cellulose maoli. ʻOkoʻa ka hana ʻana o ka cellulose ether mai nā polymers synthetic. ʻO kāna mea nui loa he cellulose, kahi hui polymer maoli. Ma muli o ke ʻano o ke ʻano o ka cellulose kūlohelohe, ʻaʻohe hiki i ka cellulose pono ke hana me nā mea etherification. Eia naʻe, ma hope o ka hoʻomaʻamaʻa ʻana i ka mea hoʻohuhū, ua luku ʻia nā paʻa 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.

ʻO nā waiwai o ka cellulose ethers e pili ana i ke ʻano, ka helu a me ka hāʻawi ʻana i nā mea pani. Hoʻokaʻawale ʻia ka helu ʻana o ka cellulose ether e like me ke ʻano o ka substituent, degere o ka etherification, solubility a me nā waiwai noi pili. E like me ke ʻano o nā substituent ma ke kaulahao mole, hiki ke hoʻokaʻawale ʻia i ka monoether a me ka ether hui. ʻO ka MC a mākou e hoʻohana mau ai he monoether, a ʻo ka HPMC he ether hui ʻia. ʻO ka methyl cellulose ether MC ka huahana ma hope o ka hoʻololi ʻana o ka hui hydroxyl ma ka ʻāpana glucose o ka cellulose maoli e ka methoxy. He huahana ia i loaʻa ma ka hoʻololi ʻana i kahi ʻāpana o ka pūʻulu hydroxyl ma ka hui me kahi pūʻulu methoxy a me kahi ʻāpana me kahi hui hydroxypropyl. ʻO ke kumu hoʻolālā 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 ka ionic a me ka non-ionic. ʻO nā etera cellulose non-ionic hiki ke hoʻoheheʻe ʻia i ka wai ka mea nui i haku ʻia me ʻelua pūʻulu o nā alkyl ethers a me hydroxyalkyl ethers. Hoʻohana nui ʻia ʻo Ionic CMC i nā mea hoʻomaʻemaʻe synthetic, paʻi lole a me ke kala, ʻimi ʻai a me ka ʻaila. ʻO ka non-ionic MC, HPMC, HEMC, a me nā mea'ē aʻe i hoʻohana nuiʻia i nā mea hana, nā latex coatings, nā lāʻau lapaʻau, nā kinikona o kēlā me kēia lā, a me nā mea'ē aʻe.

ʻO ka ʻike maikaʻi o ka cellulose ether:

Ka hopena o ka maʻiʻo methoxyl i ka maikaʻi: ka mālama ʻana i ka wai a me ka hana mānoanoa

ʻO ka hopena maikaʻi o ka maʻiʻo hydroxyethoxyl/hydroxypropoxyl: ʻoi aku ka kiʻekiʻe o ka ʻike, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai.

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

ʻO ka hopena o ka maikaʻi o ka maikaʻi: 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 ʻole, a ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai.

Ka hopena maikaʻi o ka lawe ʻana i ka māmā: ʻoi aku ka kiʻekiʻe o ke kiʻekiʻe o ka polymerization, ʻoi aku ka like o ka polymerization, a me ka liʻiliʻi o nā haumia.

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

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

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

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