Hoʻohui ʻia ʻo Cellulose Etera
ʻO ka cellulose ether kahi huaʻōlelo maʻamau no nā huahana i hana ʻia e ka hopena o ka cellulose alkali a me ka etherifying agent ma lalo o kekahi mau kūlana. Ke hoʻololi ʻia ka cellulose alkali e nā mea etherifying ʻokoʻa, e loaʻa nā ether cellulose ʻokoʻa.
Ma muli o nā waiwai ionization o nā mea pani, hiki ke hoʻokaʻawale ʻia nā cellulose ethers i ʻelua mau ʻāpana: ionic (e like me carboxymethyl cellulose) a me ka nonionic (e like me ka methyl cellulose).
Wahi a ke ʻano o ka mea pani, hiki ke hoʻokaʻawale ʻia ka cellulose ether i ka monoether (e like me ka methyl cellulose) a me ka ether i hui pū ʻia (e like me ka hydroxypropyl methyl cellulose).
E like me ka hoʻoheheʻe ʻokoʻa, hiki ke hoʻokaʻawale ʻia i ka solubility wai (e like me ka hydroxyethyl cellulose) a me ka solvent solubility (e like me ka ethyl cellulose).
ʻO nā etera cellulose hiki ke hoʻoheheʻe ʻia i ka wai i hoʻohana ʻia i nā morta maloʻo maloʻo i hoʻokaʻawale ʻia i nā etera cellulose hoʻoheheʻe koke a me ka mālama ʻana i ka ʻili.
Aia i hea ko lākou ʻokoʻa? A pehea e hoʻonohonoho pono ai i loko o kahi hopena wai wai 2% no ka hoʻāʻo ʻana i ka viscosity?
He aha ka lapaʻau ʻana?
Ka hopena ma ka cellulose ether?
ka mua
ʻO ka hoʻomaʻamaʻa ʻana i ka ʻili he ʻano hana no ka hana ʻana i kahi papa ʻili ma luna o ka ʻili o kahi mea kumu me nā ʻano mīkini, kino a me nā ʻano kemika ʻokoʻa mai ko ke kumu.
ʻO ke kumu o ka mālama ʻana i ka ʻili o ka cellulose ether e hoʻopaneʻe i ka manawa o ka hui ʻana i ka cellulose ether me ka wai e hoʻokō ai i nā koi mānoanoa lohi o kekahi mau morta pena, a me ka hoʻonui ʻana i ka pale ʻana o ka cellulose ether a hoʻomaikaʻi i ka mālama ʻana.
ʻO ka ʻokoʻa i ka wā e hoʻonohonoho ʻia ai ka wai anuanu me 2% solution wai:
Hiki ke hoʻopuehu koke ka cellulose ether i mālama ʻia i ka ʻili i loko o ka wai anuanu a ʻaʻole maʻalahi ka hoʻohui ʻana ma muli o kona mau viscosities lohi;
ʻO ka cellulose ether me ka ʻole o ka mālama ʻana i ka ʻili, ma muli o kāna mau viscosities wikiwiki, e viscous ma mua o ka hoʻopuehu ʻia ʻana i loko o ka wai anuanu, a hiki i ka agglomeration.
Pehea e hoʻonohonoho ai i ka cellulose ether non-surface-treated?
1. E hoʻokomo mua i kahi nui o ka cellulose ether i mālama ʻole ʻia i ka ʻili;
2. A laila e hoʻohui i ka wai wela ma kahi o 80 degere Celsius, ʻo ke kaumaha ka hapakolu o ka nui o ka wai i makemake ʻia, i hiki ai iā ia ke pehu a hoʻopuehu;
3. A laila, e ninini mālie i ka wai anuanu, ʻo ke kaumaha he ʻelua hapakolu o ka wai i koe e koi ʻia, e hoʻoulu mau i ka pipili mālie, a ʻaʻohe agglomeration;
4. ʻO ka hope, ma lalo o ke kūlana o ke kaumaha like, e hoʻokomo i loko o ka wai ʻauʻau wela mau a hiki i ka hāʻule ʻana o ka mahana i 20 degere Celsius, a laila hiki ke hoʻokō ʻia ka hoʻāʻo viscosity!
Ka manawa hoʻouna: Feb-02-2023