1. Mea maka o ka cellulose ether
ʻO ka cellulose ether no ke kūkulu ʻana he polymer wai-soluble non-ionic nona ke kumu:
ʻO ka cellulose (pulp lāʻau a i ʻole ka linter pulupulu), nā hydrocarbons halogenated (methane chloride, ethyl chloride a i ʻole nā halides kaulahao lōʻihi ʻē aʻe), nā hui epoxy (ethylene oxide, propylene oxide, a me nā mea ʻē aʻe)
HPMC-Hydroxypropyl Methyl Cellulose Ether
HEC-Hydroxyethyl Cellulose Ether
HEMC-Hydroxyethyl Methyl Cellulose Ether
ʻEHEC-Ethyl Hydroxyethyl Cellulose Ether
ʻEtera MC-methyl cellulose
2. Nā waiwai o ka cellulose ether
ʻO nā waiwai o nā ethers cellulose e pili ana i:
Ke kēkelē polymerization DP Ka helu o nā ʻāpana glucose—viscosity
Nā mea pani a me ko lākou kekelē o ka pani ʻana, kekelē o ke ʻano like o ka pani ʻana —- e hoʻoholo i ke kahua noi
Ka nui o ka ʻāpana—-Solubility
ʻO ka mālama ʻana i ka ʻili (ʻo ia hoʻi ka hoʻoheheʻe lohi) - pili ka manawa viscosity i ka waiwai pH o ka ʻōnaehana
Ke kēkelē hoʻololi - Hoʻomaikaʻi i ke kū'ē ʻana o ka sag a me ka workability o ka cellulose Ether.
3. Ke kuleana o ka cellulose ether - ka paʻa ʻana o ka wai
ʻO ka cellulose ether kahi hui kaulahao polymer i haku ʻia me nā ʻāpana β-D-glucose. ʻO ka hui hydroxyl i loko o ka mole a me ka ʻātoma oxygen ma ka pilina ether e hana i kahi pilina hydrogen me ka mole wai, kahi e hoʻopili ai i ka mole wai ma luna o ka ʻili o ke kaulahao polymer a hoʻopili i nā mole. I loko o ke kaulahao, hoʻopaneʻe ia i ka mahu ʻana o ka wai a hoʻopili ʻia e ka papa kumu.
Nā pono i hāʻawi ʻia e nā waiwai paʻa wai o nā ethers cellulose:
ʻAʻole pono e hoʻomaʻū i ka papa kumu, e mālama ana i ke kaʻina hana
kūkulu maikaʻi
ikaika kūpono
4. 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 mortar gypsum, ka mea i hōʻike ʻia i ka hoʻonui ʻana o ke kūlike o ka mortar.
ʻO nā pono nui i hāʻawi ʻia e ka mānoanoa o nā cellulose ethers:
E hōʻemi i ka lehu lepo
E hoʻonui i ka hoʻopili ʻana i ke kumu
E hōʻemi i ka palupalu o ka mortar
e mālama i ka mortar i like
5. Ke kuleana o ka cellulose ether - ka hana ʻili
Loaʻa i ka cellulose ether nā hui hydrophilic (nā hui hydroxyl, nā pilina ether) a me nā hui hydrophobic (nā hui methyl, nā hui ethyl, nā apo glucose) a he surfactant ia.
(ʻO ke kaumaha o ka ʻili o ka wai he 72mN/m, ʻo ka surfactant he 30mN/m, a ʻo ka cellulose ether he HPC 42, HPMC 50, MC 56, HEC 69, CMC 71mN/m)
ʻO nā pono nui i hāʻawi ʻia e ka hana ʻili o nā ethers cellulose:
Ka hopena hoʻokomo ea (ka ʻōpala laumania, ka nui pulu haʻahaʻa, ka modulus elastic haʻahaʻa, ke kū'ē ʻana i ka hau-thaw)
Ka pulu ʻana (hoʻonui i ka pipili ʻana i ka substrate)
6. Nā koi o ka gypsum plastering māmā no ka cellulose ether
(1). Paʻa wai maikaʻi
(2). Hana maikaʻi, ʻaʻohe caking
(3). Mālie ka ʻōpala ʻana o ka pūʻulu
(4). Ikaika ka pale ʻana i ka sagging
(5). ʻOi aku ke kiʻekiʻe o ka mahana o ka gel ma mua o 75°C
(6). Ka wikiwiki o ka hoʻoheheʻe ʻana
(7). ʻOi aku ka maikaʻi o ka loaʻa ʻana o ka hiki ke hoʻopaʻa i ka ea a hoʻopaʻa i nā pehu ea i loko o ka mortar
11. Pehea e hoʻoholo ai i ka nui o ka cellulose ether
No ka palaki ʻana i nā palaki, pono e mālama i ka wai lawa i loko o ka mortar no ka manawa lōʻihi i mea e hana maikaʻi ai a pale aku i nā māwae o ka ʻili. I ka manawa like, mālama ka cellulose ether i ka nui kūpono o ka wai no ka manawa lōʻihi e hana ai i ka mortar i kahi kaʻina hana coagulation paʻa.
ʻO ka nui o ka cellulose ether e pili ana i:
Ka mānoanoa o ka cellulose ether
Ke kaʻina hana o ka cellulose ether
ʻO ka ʻike pani a me ka hoʻolaha ʻana o Cellulose Ether
Ka Hoʻolaha ʻana o ka Nui o nā ʻĀpana o Cellulose Ether
Nā ʻano a me ka haku mele ʻana o ka mortar gypsum
Ka hiki ke omo wai o ka papa kumu
Ka Hoʻohana ʻana i ka Wai no ka Hoʻolaha Maʻamau o ka Mortar Gypsum-Based
Ka manawa hoʻonohonoho o ka mortar gypsum
ʻO ka mānoanoa o ke kūkulu ʻana a me ka hana kūkulu ʻana
Nā kūlana kūkulu (e like me ka mahana, ka wikiwiki o ka makani, a pēlā aku)
ʻAno hana (ka ʻoki lima ʻana, ka pīpī mīkini)
Ka manawa hoʻouna: Ian-18-2023