Hoʻokaʻawale ʻana o ka Cellulose Ether
ʻO ka Cellulose ether kahi huaʻōlelo maʻamau no 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. Ke pani ʻia ka cellulose alkali e nā mea etherifying like ʻole, e loaʻa nā cellulose ethers like ʻole.
Wahi a nā waiwai ionization o nā substituents, hiki ke hoʻokaʻawale ʻia nā cellulose ethers i ʻelua mau māhele: ionic (e like me carboxymethyl cellulose) a me nonionic (e like me methyl cellulose).
Wahi a ke ʻano o ka pani, hiki ke hoʻokaʻawale ʻia ka cellulose ether i monoether (e like me ka methyl cellulose) a me ka ether i hui ʻia (e like me ka hydroxypropyl methyl cellulose).
Wahi a nā ʻano solubility like ʻole, hiki ke hoʻokaʻawale ʻia i ka solubility wai (e like me ka hydroxyethyl cellulose) a me ka solubility solvent organic (e like me ka ethyl cellulose).
Ua māhele ʻia nā ethers cellulose wai-hoʻoheheʻe ʻia i hoʻohana ʻia i loko o nā mortar maloʻo-i hui ʻia i nā ethers cellulose hoʻoheheʻe koke a me nā ethers cellulose hoʻoheheʻe lohi i mālama ʻia ma luna.
ʻAuhea ko lākou ʻokoʻa? A pehea e hoʻonohonoho pono ai iā ia i loko o kahi hopena wai 2% no ka hoʻāʻo ʻana i ka viscosity?
He aha ka mālama ʻili?
Hopena ma ka cellulose ether?
ka mua
ʻO ka mālama ʻili kahi ʻano hana no ka hana ʻana i kahi papa ʻili ma luna o ka ʻili o kahi mea kumu me nā ʻano mechanical, physical a me kemika ʻokoʻa mai ko ke kumu.
ʻO ke kumu o ka mālama ʻana i ka ʻili o ka cellulose ether, ʻo ia ka hoʻopaneʻe ʻana i ka manawa o ka hoʻohui ʻana i ka cellulose ether me ka wai e hoʻokō ai i nā koi mānoanoa lohi o kekahi mau mortar pena, a e hoʻonui pū i ke kūpaʻa ʻana o ka cellulose ether i ka corrosion a hoʻomaikaʻi i ke kūpaʻa mālama.
ʻO ka ʻokoʻa ke hoʻonohonoho ʻia ka wai anuanu me ka hopena wai 2%:
Hiki i ka cellulose ether i mālama ʻia i ka ʻili ke hoʻopuehu koke i ka wai anuanu a ʻaʻole maʻalahi ka hoʻopili ʻana ma muli o kona lohi o ka viscosities;
ʻO ka cellulose ether me ka ʻole o ka mālama ʻana i ka ʻili, ma muli o kona viscosities wikiwiki, e viscous ma mua o ka hoʻopuehu loa ʻia ʻana i ka wai anuanu, a he maʻalahi hoʻi i ka agglomeration.
Pehea e hoʻonohonoho ai i ka etera cellulose i mālama ʻole ʻia ma ka ʻili?
1. E kau mua i kahi nui o ka cellulose ether i mālama ʻole ʻia ma ka ʻili;
2. A laila e hoʻohui i ka wai wela ma kahi o 80 degere Celsius, ʻo ke kaumaha he hapakolu o ka nui o ka wai e pono ai, i hiki ai iā ia ke pehu piha a hoʻopuehu;
3. A laila, e ninini mālie i ka wai anuanu, ʻo ke kaumaha he ʻelua hapakolu o ke koena o ka wai e pono ai, e hoʻoulu mau e hoʻopili mālie, a ʻaʻohe puʻupuʻu;
4. ʻO ka mea hope loa, ma lalo o ke kūlana o ke kaumaha like, e hoʻokomo i loko o kahi ʻauʻau wai mahana mau a hiki i ka hāʻule ʻana o ka mahana i 20 degere Celsius, a laila hiki ke hoʻokō ʻia ka hoʻāʻo mānoanoa!
Ka manawa hoʻouna: Pepeluali-02-2023