ʻIke nui: i kapa ʻia ʻo HPMC, pauka fibrous a granular keʻokeʻo a keʻokeʻo paha. Nui nā ʻano cellulose a hoʻohana nui ʻia, akā hoʻokaʻaʻike nui mākou me nā mea kūʻai aku ma ka ʻoihana mea hana hale pauka maloʻo. ʻO ka cellulose maʻamau e pili ana i ka hypromellose.
Kaʻina hana: ʻO nā mea maka nui o HPMC: pulupulu i hoʻomaʻemaʻe ʻia, methyl chloride, propylene oxide, nā mea maka ʻē aʻe e komo pū me ka flake alkali, acid, toluene, isopropanol, a pēlā aku. E mālama i ka cellulose pulupulu i hoʻomaʻemaʻe ʻia me ka hopena alkali ma 35-40 ℃ no ka hapalua hola, kaomi, pulverize i ka cellulose, a hoʻomaʻamaʻa pono ma 35 ℃, i hiki ai i ke kiʻekiʻe awelika o ka polymerization o ka fiber alkali i loaʻa i loko o ka pae i koi ʻia. E hoʻokomo i nā fibers alkali i loko o ka ipu etherification, e hoʻohui i ka propylene oxide a me ka methyl chloride, a etherify ma 50-80 °C no 5 mau hola, me ke kaomi kiʻekiʻe o kahi 1.8 MPa. A laila e hoʻohui i kahi nui kūpono o ka hydrochloric acid a me ka oxalic acid i ka wai wela ma 90 °C e holoi i ka mea e hoʻonui i ka nui. Dehydrate me kahi centrifuge. E holoi a hiki i ka neutral, a i ka wā e emi ai ka makū o ka mea ma mua o 60%, e hoʻomaloʻo me ke kahe ea wela ma 130 °C a i lalo o 5%. Hana: paʻa wai, mānoanoa, thixotropic anti-sag, hana ea-entraining, hoʻopaneʻe i ka hoʻonohonoho ʻana.
Paʻa wai: ʻO ka paʻa wai ka waiwai nui loa o ka cellulose ether! I ka hana ʻana o ka putty gypsum mortar a me nā mea ʻē aʻe, he mea nui ka hoʻohana ʻana o ka cellulose ether. Hiki i ka paʻa wai kiʻekiʻe ke hoʻopau piha i ka lehu sima a me ka calcium gypsum (ʻo ka nui o ka hopena, ʻoi aku ka ikaika). Ma lalo o nā kūlana like, ʻoi aku ka kiʻekiʻe o ka viscosity o ka cellulose ether, ʻoi aku ka maikaʻi o ka paʻa wai (ua emi ka hakahaka ma luna o 100,000 viscosity); ʻoi aku ka kiʻekiʻe o ka dosage, ʻoi aku ka maikaʻi o ka paʻa wai, ʻo ka hapa liʻiliʻi o ka cellulose ether hiki ke hoʻomaikaʻi nui i ka hana o ka mortar. ʻO ka nui o ka paʻa wai, i ka wā e hiki ai ka ʻike i kahi pae, e lohi ke ʻano o ka hoʻonui ʻana i ka nui o ka paʻa wai; emi pinepine ka nui o ka paʻa wai o ka cellulose ether i ka wā e piʻi ai ka mahana ambient, akā ʻoi aku ka maikaʻi o ka hana o kekahi mau cellulose ethers kiʻekiʻe ma lalo o nā kūlana wela kiʻekiʻe. Paʻa wai. ʻO ka interdiffusion ma waena o nā mole wai a me nā kaulahao mole cellulose ether e hiki ai i nā mole wai ke komo i loko o nā kaulahao macromolecular cellulose ether a loaʻa ka ikaika paʻa ikaika, no laila e hana ana i ka wai manuahi, e hoʻopili ana i ka wai, a hoʻomaikaʻi i ka paʻa wai o ka slurry sima.
ʻO ka mānoanoa, thixotropic a me ka anti-sag: hāʻawi i ka viscosity maikaʻi loa i ka mortar pulu! Hiki iā ia ke hoʻonui nui i ka hoʻopili ʻana ma waena o ka mortar pulu a me ka papa kumu, a hoʻomaikaʻi i ka hana anti-sagging o ka mortar. ʻO ka hopena mānoanoa o nā cellulose ethers e hoʻonui pū i ke kū'ē ʻana i ka hoʻolaha a me ka homogeneity o nā mea i hui hou ʻia, e pale ana i ka delamination mea, ka hoʻokaʻawale ʻana a me ke kahe ʻana o ke koko. ʻO ka hopena mānoanoa o nā cellulose ethers ma nā mea i hoʻokumu ʻia i ka sima mai ka viscosity o nā hopena cellulose ether. Ma lalo o nā kūlana like, ʻo ke kiʻekiʻe o ka viscosity o ka cellulose ether, ʻoi aku ka maikaʻi o ka viscosity o ka mea i hoʻokumu ʻia i ka sima i hoʻololi ʻia, akā inā nui loa ka viscosity, e hoʻopilikia ia i ka fluidity a me ka hana o ka mea (e like me ka trowel sticky a me ka batch scraper). laborious). ʻO ka mortar self-leveling a me ka sima self-compacting e pono ai ka fluidity kiʻekiʻe e pono ai ka viscosity haʻahaʻa o ka cellulose ether. Eia kekahi, ʻo ka hopena mānoanoa o ka cellulose ether e hoʻonui i ka koi wai o nā mea i hoʻokumu ʻia i ka sima a hoʻonui i ka hua o ka mortar. ʻO ka viscosity kiʻekiʻe o ka cellulose ether aqueous solution he thixotropy kiʻekiʻe, ʻo ia hoʻi kahi ʻano nui o ka cellulose ether. ʻO ka maʻamau, loaʻa i nā hopena wai o ka cellulose nā waiwai kahe pseudoplastic, non-thixotropic ma lalo o ko lākou mahana gel, akā ʻo nā waiwai kahe Newtonian ma nā helu shear haʻahaʻa. Hoʻonui ka Pseudoplasticity me ka hoʻonui ʻana i ke kaumaha molekala a i ʻole ka nui o ka cellulose ether. Hoʻokumu ʻia nā gels structural ke hoʻonui ʻia ka mahana, a loaʻa ke kahe thixotropic kiʻekiʻe. Hōʻike nā cellulose ethers me nā nui kiʻekiʻe a me ka viscosity haʻahaʻa i ka thixotropy ma lalo o ka mahana gel. He pōmaikaʻi nui kēia waiwai i ke kūkulu ʻana i ka mortar hale e hoʻoponopono i kona pae a me ka sag. Pono e hoʻomaopopo ʻia ma ʻaneʻi ʻo ke kiʻekiʻe o ka viscosity o ka cellulose ether, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai, akā ʻo ke kiʻekiʻe o ka viscosity, ʻoi aku ke kiʻekiʻe o ke kaumaha molekala pili o ka cellulose ether, a me ka emi like ʻana o kona solubility, kahi hopena maikaʻi ʻole i ka nui o ka mortar a me ka hana.
Kumu: Loaʻa i ka Cellulose ether ka hopena ea-entraining maopopo ma nā mea sima hou. Loaʻa i ka Cellulose ether kahi hui hydrophilic (hui hydroxyl, hui ether) a me kahi hui hydrophobic (hui methyl, apo glucose), he surfactant, he hana ʻili, a no laila he hopena ea-entraining. ʻO ka hopena ea-entraining o ka cellulose ether e hana i kahi hopena "pōpō", hiki ke hoʻomaikaʻi i ka hana hana o ka mea i hui hou ʻia, e like me ka hoʻonui ʻana i ka plasticity a me ka laumania o ka mortar i ka wā o ka hana, he mea maikaʻi ia no ka paving o ka mortar; e hoʻonui pū ia i ka hana o ka mortar. , e hōʻemi ana i ke kumukūʻai o ka hana mortar; akā e hoʻonui ia i ka porosity o ka mea paʻakikī a hoʻemi i kona mau waiwai mechanical e like me ka ikaika a me ka modulus elastic. Ma ke ʻano he surfactant, loaʻa pū i ka cellulose ether kahi hopena pulu a lubricating paha ma nā ʻāpana sima, kahi e hui pū ai me kāna hopena ea-entraining e hoʻonui ai i ka wai o nā mea sima, akā ʻo kona hopena mānoanoa e hōʻemi i ka wai. ʻO ka hopena o ke kahe he hui pū ʻana o nā hopena plasticizing a me ka mānoanoa. Ke haʻahaʻa loa ka nui o ka cellulose ether, ʻike nui ʻia ia ma ke ʻano he hopena plasticizing a i ʻole ka hoʻemi ʻana i ka wai; ke kiʻekiʻe ka nui, piʻi koke ka hopena mānoanoa o ka cellulose ether, a ʻo kona hopena e hoʻopaʻa ʻia ai ka ea e hoʻomaʻalili ʻia, no laila e hoʻonui ʻia ka hana. ʻO ka hopena mānoanoa a i ʻole ka hoʻonui ʻana i ke koi wai.
Ka lohi o ke kau ʻana: Hiki i ka Cellulose ether ke hoʻopaneʻe i ke kaʻina hana hydration o ka sima. Hāʻawi nā Cellulose ethers i ka mortar me nā waiwai pono like ʻole, a hōʻemi pū i ka hoʻokuʻu ʻana o ka wela hydration mua o ka sima a hoʻopaneʻe i ke kaʻina hana hydration kinetic o ka sima. He mea kūpono ʻole kēia no ka hoʻohana ʻana i ka mortar ma nā wahi anuanu. Hoʻokumu ʻia kēia lohi e ka adsorption o nā mole cellulose ether ma nā huahana hydration e like me CSH a me ca (OH) 2. Ma muli o ka hoʻonui ʻia ʻana o ka viscosity o ka hopena pore, hoʻemi ka cellulose ether i ka neʻe ʻana o nā ions i loko o ka hopena, a laila e hoʻopaneʻe ana i ke kaʻina hana hydration. ʻO ke kiʻekiʻe o ka nui o ka cellulose ether i loko o ka mea gel mineral, ʻoi aku ka ʻike ʻia o ka hopena o ka lohi hydration. ʻAʻole wale nā Cellulose ethers e hoʻopaneʻe i ke kau ʻana, akā e hoʻopaneʻe pū i ke kaʻina hana paʻakikī o ka ʻōnaehana mortar sima. ʻO ka hopena lohi o ka cellulose ether ʻaʻole ia e pili wale i kona nui i loko o ka ʻōnaehana gel mineral, akā i ke ʻano kemika. ʻO ke kiʻekiʻe o ke kiʻekiʻe o ka methylation o HEMC, ʻoi aku ka maikaʻi o ka hopena lohi o ka cellulose ether. ʻOi aku ka ikaika o ka hopena lohi. Eia naʻe, ʻaʻohe hopena nui o ka viscosity o ka cellulose ether i ka hydration kinetics o ka sima. Me ka hoʻonui ʻia ʻana o ka nui o ka cellulose ether, piʻi nui ka manawa hoʻonohonoho o ka mortar. Aia kahi pilina nonlinear maikaʻi ma waena o ka manawa hoʻonohonoho mua o ka mortar a me ka nui o ka cellulose ether, a ʻo ka manawa hoʻonohonoho hope loa he pilina linear maikaʻi me ka nui o ka cellulose ether. Hiki iā mākou ke kāohi i ka manawa hana o ka mortar ma ka hoʻololi ʻana i ka nui o ka cellulose ether. I loko o ka huahana, hoʻokani ia i ke kuleana o ka paʻa ʻana o ka wai, ka mānoanoa, ka hoʻopaneʻe ʻana i ka mana hydration sima, a me ka hoʻomaikaʻi ʻana i ka hana kūkulu. ʻO ka hiki ke paʻa wai maikaʻi e hana i ka sima gypsum ash calcium e pane piha, hoʻonui nui i ka viscosity pulu, hoʻomaikaʻi i ka ikaika paʻa o ka mortar, a i ka manawa like hiki ke hoʻomaikaʻi pono i ka ikaika tensile a me ka ikaika shear, hoʻomaikaʻi nui i ka hopena kūkulu a me ka pono hana. Manawa hiki ke hoʻololi ʻia. Hoʻomaikaʻi i ka pīpī a i ʻole ka pumpability o ka mortar, a me ka ikaika kūkulu. I ke kaʻina hana noi maoli, pono e hoʻoholo i ke ʻano, ka viscosity, a me ka nui o ka cellulose e like me nā huahana like ʻole, nā ʻano kūkulu, a me ke kaiapuni.
Ka manawa hoʻouna: Nov-15-2022