1. Mea maka o ka cellulose ether
ʻO ka cellulose ether no ke kūkulu ʻana he polymer non-ionic water-soluble nona ke kumu:
Cellulose (lāʻau pulp a pulupulu linter), halogenated hydrocarbons (methane chloride, ethyl chloride a i ʻole nā halides kaulahao lōʻihi), epoxy pūhui (ethylene oxide, propylene oxide, etc.)
HPMC-Hydroxypropyl Methyl Cellulose Etera
HEC-Hydroxyethyl Cellulose Etera
HEMC-Hydroxyethyl Methyl Cellulose Etera
EHEC-Ethyl Hydroxyethyl Cellulose Etera
MC-methyl cellulose ether
2. Nā waiwai o ka cellulose ether
ʻO nā waiwai o ka cellulose ethers e pili ana i:
Polymerization degere DP Ka helu o nā ʻāpana glucose—viscosity
ʻO nā mea pani a me ko lākou degere o ka hoʻololi ʻana, degere o ka like ʻole o ka hoʻololi ʻana -- e hoʻoholo i ke kahua noi
Ka nui o ka ʻāpana—-Solubility
ʻO ka mālama ʻana i ka ʻili (ʻo ia hoʻi ka hoʻokaʻawale ʻana)—-pili ka manawa viscosity i ka waiwai pH o ka ʻōnaehana
Degere hoʻololi—-E hoʻomaikaʻi i ka pale sag a me ka hana o cellulose ether.
3. ʻO ke kuleana o ka cellulose ether - paʻa wai
ʻO ka cellulose ether kahi hui kaula polimer i haku ʻia me nā ʻāpana β-D-glucose. ʻO ka hui hydroxyl i loko o ka mole a me ka oxygen atom ma ka paʻa etera e hana i kahi paʻa hydrogen me ka mole wai, e hoʻopili i ka mole wai ma ka ʻili o ke kaulahao polymer a hoʻopili i nā mole. I loko o ke kaulahao, hoʻopaneʻe ia i ka evaporation o ka wai a hoʻopaʻa ʻia e ka papa kumu.
ʻO nā pōmaikaʻi i hāʻawi ʻia e nā waiwai mālama wai o cellulose ethers:
ʻAʻole pono e hoʻomaʻemaʻe i ka papa kumu, mālama kaʻina
hale maikai
lawa ka ikaika
4. ʻO ke kuleana o ka cellulose ether - ka hopena mānoanoa
Hiki i ka cellulose ether ke hoʻonui i ka pilina ma waena o nā ʻāpana o ka gypsum-based mortar, ka mea i hōʻike ʻia i ka hoʻonui ʻana o ka paʻa o ka mortar.
ʻO nā pōmaikaʻi nui i hāʻawi ʻia e ka mānoanoa o ka cellulose ethers:
E hoemi i ka lehu lepo
E hoʻonui i ka pili ʻana i ke kumu
E ho'ēmi i ka hāʻuleʻana o ka mortar
e malama pono i ka moka
5. ʻO ke kuleana o ka cellulose ether - ka hana ma luna
Loaʻa i ka cellulose ether nā pūʻulu hydrophilic (nā pūʻulu hydroxyl, nā paʻa eter) a me nā pūʻulu hydrophobic (nā pūʻulu methyl, nā pūʻulu ethyl, nā apo glucose) a he surfactant.
(ʻO 72mN/m ka ʻili o ka wai, surfactant he 30mN/m, a ʻo ka cellulose ether ʻo HPC 42, HPMC 50, MC 56, HEC 69, CMC 71mN/m)
ʻO nā pōmaikaʻi nui i hāʻawi ʻia e ka hana honua o cellulose ethers:
ʻO ka hopena komo ʻana i ka ea (ka ʻōpala maʻemaʻe, ka mākū haʻahaʻa haʻahaʻa, ka modulus elastic haʻahaʻa, ke kūpaʻa hoʻoheheʻe-hau)
Ka pulu (hoʻonui i ka pili ʻana i ka substrate)
6. Nā koi o ka gypsum plastering māmā no ka cellulose ether
(1). Paʻa wai maikaʻi
(2). Maikaʻi ka hana, ʻaʻohe caking
(3). ʻO ka ʻōpala ʻauʻau maʻemaʻe
(4). Paʻa pale-sagging
(5). ʻOi aku ka mahana o ka gel ma mua o 75 ° C
(6). Holo wikiwiki
(7). ʻOi aku ka maikaʻi o ka loaʻa ʻana o ka hiki ke komo i ka ea a hoʻopaʻa i nā ʻōhū ea i loko o ka momi
11. Pehea e hoʻoholo ai i ke ʻano o ka cellulose ether
No ka hoʻopalapala ʻana i nā pulupulu, pono e mālama pono i ka wai i loko o ka pahū no ka manawa lōʻihi i mea e loaʻa ai ka hana maikaʻi a pale aku i nā māwae ili. I ka manawa like, mālama ka cellulose ether i ka nui o ka wai kūpono no ka manawa lōʻihi e hana i ka mortar i kahi kaʻina coagulation paʻa.
ʻO ka nui o ka cellulose ether e pili ana i:
Viscosity o ka cellulose ether
ʻO ke kaʻina hana o ka cellulose ether
ʻO ka maʻiʻo a me ka hāʻawi ʻana i ka Cellulose Ether
ʻO ka mahele ʻāpana ʻāpana o ka Cellulose Etera
ʻO nā ʻano a me ka hoʻohui ʻana o ka gypsum-based mortar
ʻO ka hiki ke komo wai o ka papa kumu
ʻO ka hoʻohana ʻana i ka wai no ka hoʻopuehu maʻamau o ka gypsum-based motar
Hoʻonohonoho i ka manawa o ka gypsum-based mortar
Ka mānoanoa hana a me ka hana hana
Nā kūlana hana (e like me ka mahana, ka makani makani, etc.)
ʻO ke ʻano hana (ka ʻili ʻana ma ka lima, ka hoʻoheheʻe mechanical)
Ka manawa hoʻouna: Jan-18-2023