Laʻana o ka cellulose ether

ʻEtera celluloseʻO ka laʻana he hui polymer i hana ʻia me ka cellulose me kahi ʻano ether. Loaʻa i kēlā me kēia apo glucose i loko o ka macromolecule cellulose ʻekolu mau hui hydroxyl, ka hui hydroxyl mua ma ka ʻātoma kalapona ʻeono, a me ka hui hydroxyl lua ma nā ʻātoma kalapona ʻelua a me ke kolu. Hoʻololi ʻia ka hydrogen i loko o ka hui hydroxyl e ka hui hydrocarbon e hana i ka cellulose. ʻO ia ka huahana o ka pani ʻana o ka hydroxyl hydrogen e ka hui hydrocarbon i loko o ka polymer cellulose. ʻO ka Cellulose kahi hui polyhydroxy polymer ʻaʻole e hoʻoheheʻe a hoʻoheheʻe paha. Hiki ke hoʻoheheʻe ʻia ka Cellulose i loko o ka wai, hoʻoheheʻe i ka hopena alkali a me ka mea hoʻoheheʻe organik ma hope o ka etherification, a he mau waiwai thermoplastic.

ʻO ka Cellulose ether ka huaʻōlelo maʻamau o kahi moʻo o nā huahana i hana ʻia e ka hopena o ka cellulose alkali a me ka mea etherifying ma lalo o kekahi mau kūlana. Hoʻololi ʻia ka cellulose alkali e nā mea etherifying like ʻole e loaʻa ai nā ethers cellulose like ʻole.

Wahi a nā waiwai ionization o nā substituents, hiki ke hoʻokaʻawale ʻia nā cellulose ethers i ʻelua mau ʻāpana ionic (e like me carboxymethyl cellulose) a me non-ionic (e like me methyl cellulose).

Ma ke ʻano o ka mea pani,nā ethers celluloseHiki ke hoʻokaʻawale ʻia ka laʻana i hoʻokahi ether (e like me ka methyl cellulose) a me ka hui ʻana o ka ether (e like me ka hydroxypropyl methyl cellulose). Wahi a ka solubility, hiki ke hoʻokaʻawale ʻia i ka wai hiki ke hoʻoheheʻe ʻia (e like me ka hydroxyethyl cellulose) a me ka solubility organic solvent (e like me ka ethyl cellulose). Hoʻohana nui ka mortar maloʻo i hui ʻia i ka cellulose wai hiki ke hoʻoheheʻe ʻia, hiki ke hoʻokaʻawale ʻia i ke ʻano hoʻoheheʻe wikiwiki a me ke ʻano hoʻoheheʻe lohi ma hope o ka mālama ʻana i ka ʻili.

He kuleana koʻikoʻi ko nā mea hoʻohuihui i ka hoʻomaikaʻi ʻana i nā waiwai o ka mortar maloʻo-huihui a ʻoi aku ma mua o 40% o ke kumukūʻai o nā mea i loko o ka mortar maloʻo-huihui. ʻO kahi hapa nui o ka mea hoʻohuihui ma ka mākeke kūloko e hoʻolako ʻia e nā mea hana haole, a ʻo ka nui o ka huahana e hāʻawi ʻia e nā mea hoʻolako. ʻO ka hopena, ke kiʻekiʻe nei ke kumukūʻai o nā huahana mortar maloʻo-huihui, a he paʻakikī ke hoʻolaha i ka mortar masonry maʻamau a me ka mortar plastering me ka nui a me ka wahi ākea. Hoʻomalu ʻia nā huahana mākeke kiʻekiʻe e nā ʻoihana haole, haʻahaʻa ka loaʻa kālā o nā mea hana mortar maloʻo, haʻahaʻa ke kumukūʻai; ʻAʻole i loaʻa ka noiʻi ʻōnaehana a me ka nānā pono ʻana i ka hoʻopili ʻana o ka mea hoʻohuihui, hahai makapō i nā ʻano hana haole.

ʻO ka mea paʻa wai ka mea hoʻohui nui e hoʻomaikaʻi i ka hana paʻa wai o ka mortar maloʻo i kāwili ʻia a ʻo ia kekahi o nā mea hoʻohui nui e hoʻoholo ai i ke kumukūʻai o ka mortar maloʻo i kāwili ʻia. ʻO ka hana nui o ka cellulose ether ka mālama ʻana i ka wai.

ʻO ke ʻano hana o ka cellulose ether i loko o ka mortar penei:

(1) ʻO ka mortar i loko o ka cellulose ether i hoʻoheheʻe ʻia i ka wai, no ka mea, ʻo ka hana ikaika o ka ʻili e hōʻoia i ka hoʻolaha like ʻana o ka mea gelled i loko o ka ʻōnaehana, a me ka cellulose ether ma ke ʻano he ʻano colloid pale, "pūʻolo" i nā ʻāpana paʻa, a ma kona ʻili waho e hana i kahi papa o ka lubrication film, ʻoi aku ka paʻa o ka ʻōnaehana slurry, a hoʻomaikaʻi pū i ka slurry i ke kaʻina hana hui ʻana o ka liquidity a me ke kūkulu ʻana o ka slip hiki ke like.

(2)ʻEtera celluloseʻO ka hopena ma muli o kona ʻano hoʻonohonoho molekala ponoʻī, i ʻole e maʻalahi ka nalowale ʻana o ka wai i loko o ka mortar, a hoʻokuʻu mālie ʻia i kahi manawa lōʻihi, e hāʻawi ana i ka mortar i ka paʻa wai maikaʻi a me ka hana.