Hydroxypropylmethylcellulose

Nānā: ʻōlelo ʻia ʻo HPMC, keʻokeʻo a i ʻole keʻokeʻo keʻokeʻo a i ʻole ka pauka granular. Nui nā ʻano cellulose a hoʻohana nui ʻia, akā ke kamaʻilio nui nei mākou me nā mea kūʻai aku i ka ʻoihana hale lepo maloʻo. ʻO ka cellulose maʻamau e pili ana i ka hypromellose.

Kaʻina hana: ʻO nā mea nui o ka HPMC: ka pulupulu hoʻomaʻemaʻe, ka methyl chloride, propylene oxide, nā mea waiwai ʻē aʻe e pili ana i ka flake alkali, acid, toluene, isopropanol, a me nā mea ʻē aʻe. hola, kaomi, pulverize i ka cellulose, a me ka pono makahiki ma 35 ℃, no laila, i ka awelika degere o ka polymerization o ka loaʻa alkali fiber i loko o ka i koi 'ia. E hoʻokomo i nā ʻūhā alkali i loko o ka ipu etherification, e hoʻohui i ka propylene oxide a me ka methyl chloride i ka huli ʻana, a etherify ma 50-80 ° C no 5 mau hola, me ke kaomi kiʻekiʻe ma kahi o 1.8 MPa. A laila e hoʻohui i ka nui kūpono o ka waika hydrochloric a me ka waikawa oxalic i ka wai wela ma 90 ° C e holoi i ka mea e hoʻonui ai i ka leo. Dehydrate me ka centrifuge. Holoi a hiki i ke kū ʻole, a i ka wā i emi iho ai ka makū o ka mea ma lalo o 60%, e hoʻomaloʻo iā ia me kahi kahe ea wela ma 130 ° C a emi iho ma mua o 5%. Hana: paʻa wai, mānoanoa, thixotropic anti-sag, ea-entraining workability, retarding setting.

Ka paʻa wai: ʻO ka mālama wai ka waiwai nui loa o ka cellulose ether! I ka hana ʻana o ka putty gypsum mortar a me nā mea ʻē aʻe, pono ka noi cellulose ether. Hiki i ka paʻa wai kiʻekiʻe ke hana piha i ka lehu sima a me ka gypsum calcium (ʻo ka nui o ka hopena, ʻoi aku ka ikaika). Ma lalo o nā kūlana like, ʻoi aku ka kiʻekiʻe o ka viscosity o cellulose ether, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai (ua hoʻemi ʻia ke āpau ma luna o 100,000 viscosity); ʻoi aku ka kiʻekiʻe o ka dosage, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai, ʻoi aku ka liʻiliʻi o ka cellulose ether hiki ke hoʻomaikaʻi nui i ka hana o ka mortar. ʻO ka nui o ka mālama ʻana i ka wai, ke piʻi ka ʻike i kahi pae, e lohi ke ʻano o ka hoʻonui ʻana i ka paʻa wai; ʻO ka nui o ka mālama ʻana i ka wai o ka cellulose ether e hoʻemi maʻamau i ka wā e piʻi ai ka mahana ambient, akā ʻoi aku ka maikaʻi o ka hana ʻana o kekahi mau etera cellulose kiʻekiʻe-gel ma lalo o nā kūlana wela kiʻekiʻe. Paʻa wai. ʻO ka interdiffusion ma waena o nā molekala wai a me nā kaulahao moleki cellulose ether e hiki ai i nā molekole wai ke komo i loko o nā kaulahao macromolecular cellulose ether a loaʻa ka ikaika paʻa ikaika, a laila e hana ai i ka wai manuahi, entangling wai, a me ka hoʻomaikaʻi ʻana 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 adhesion 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 i ka dispersion resistance a me ka homogeneity o nā mea hou i hui pū ʻia, e pale ana i ka delamination mea, ka hoʻokaʻawale a me ke koko. ʻO ka hopena mānoanoa o nā cellulose ethers ma nā mea i hoʻokumu ʻia i ka sima mai ka viscosity o ka cellulose ether solutions. Ma lalo o nā kūlana like, ʻoi aku ka kiʻekiʻe o ka viscosity o cellulose ether, ʻoi aku ka maikaʻi o ka viscosity o ka mea i hoʻololi ʻia i ka sima, akā inā ʻoi aku ka nui o ka viscosity, e hoʻopilikia ia i ka wai a me ka operability o ka mea (e like me ka sticky trowel and batch. scraper). hana nui). ʻO ka mortar hoʻokiʻekiʻe ponoʻī a me ka paʻa paʻa ponoʻī e koi ana i ka wai kiʻekiʻe e koi i ka viscosity haʻahaʻa o cellulose ether. Eia kekahi,ʻo ka hopena mānoanoa o ka cellulose ether e hoʻonui i ka koi wai o nā mea sima a hoʻonui i ka hua o ka mortar. Loaʻa i ka thixotropy kiʻekiʻe ka viscosity cellulose ether aqueous solution, ʻo ia hoʻi kahi ʻano nui o ka cellulose ether. He pseudoplastic, non-thixotropic kahe ana o ka wai o ka cellulose ma lalo o ko lakou wela gel, aka, he mau waiwai kahe o Newtonian i na au liilii. Hoʻonui ka pseudoplasticity me ka hoʻonui ʻana i ke kaumaha molekala a i ʻole ka ʻike ʻana o ka cellulose ether. Hoʻokumu ʻia nā gels Structural i ka wā i hoʻonui ʻia ai ka mahana, a hiki ke kahe thixotropic kiʻekiʻe. Hōʻike nā cellulose ethers me nā kiʻekiʻe kiʻekiʻe a me ka viscosity haʻahaʻa i ka thixotropy ma lalo o ka mahana gel. He waiwai nui kēia waiwai i ke kūkulu ʻia ʻana o ka pahū hale e hoʻoponopono ai i kona pae ʻana a me ka sag. Pono e hoʻomaopopo ʻia ma ʻaneʻi, ʻoi aku ka kiʻekiʻe o ka viscosity o ka cellulose ether, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai, akā ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka kiʻekiʻe o ke kaumaha molecular pili o ka cellulose ether, a me ka emi ʻana o kona solubility, he ʻino ʻole. ka hopena i ka hoʻopaʻa ʻana o ka mortar a me ka hana.

Ke kumu: Loaʻa i ka cellulose ether ka hopena e hoʻokomo i ka ea ma nā mea hana sima hou. Loaʻa i ka cellulose ether kahi hui hydrophilic (hui hydroxyl, pūʻulu ether) a me kahi hui hydrophobic (hui pūʻulu methyl, glucose ring), he surfactant, he hana ma luna, a no laila he hopena ea. ʻO ka hopena o ka ea o ka cellulose ether e hoʻopuka i kahi hopena "pōpō", hiki ke hoʻomaikaʻi i ka hana hana o nā mea hou i hui pū ʻia, e like me ka hoʻonui ʻana i ka plasticity a me ka maʻalahi o ka mortar i ka wā o ka hana, he mea maikaʻi ia i ka paving o ka mortar. ; e hoʻonui ai i ka puka o ka pahū. , e ho'ēmi ana i ke kumukūʻai o ka hana motar; akā, e hoʻonui ia i ka porosity o ka mea paʻakikī a hoʻemi i kona mau mea mechanical e like me ka ikaika a me ka modulus elastic. Ma ke ʻano he surfactant, ʻo ka cellulose ether ka hopena wai a i ʻole ka lubricating ma nā ʻāpana sima, a me kāna hopena ea 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 ka hui ʻana o ka plasticizing a me nā hopena mānoanoa. Ke haʻahaʻa loa ka ʻike o ka cellulose ether, ʻike ʻia ʻo ia ma ke ʻano he plasticizing a i ʻole ka hopena hoʻemi wai; ke kiʻekiʻe ka maʻiʻo, piʻi wikiwiki ka hopena mānoanoa o ka cellulose ether, a ʻo ka hopena o ka ea-entraining e hoʻopiha ʻia, no laila ua hoʻonui ʻia ka hana. Ka hopena mānoanoa a i ʻole ka piʻi ʻana o ka makemake wai.

Ka hoʻonohonoho ʻana i ka lohi: Hiki i ka cellulose ether ke hoʻopaneʻe i ke kaʻina hydration o ka sima. Hāʻawi nā cellulose ethers i ka mortar me nā waiwai pono like ʻole, a hoʻemi hoʻi i ka hoʻokuʻu ʻana i ka wela hydration mua o ka sima a hoʻopaneʻe i ke kaʻina hydration kinetic o ka sima. ʻAʻole maikaʻi kēia no ka hoʻohana ʻana i ka mortar ma nā wahi anuanu. Hoʻokumu ʻia kēia hoʻihoʻi ʻana e ka adsorption o nā molekole cellulose ether ma nā huahana hydration e like me CSH a me ca(OH)2. Ma muli o ka piʻi ʻana o ka viscosity o ka solution pore, hoʻemi ka cellulose ether i ka neʻe ʻana o nā ion i loko o ka hopena, a laila e hoʻopaneʻe i ke kaʻina hydration. ʻOi aku ka kiʻekiʻe o ka cellulose ether i loko o ka mineral gel material, ʻoi aku ka maikaʻi o ka hopena o ka hydration lohi. ʻAʻole hoʻopaneʻe wale nā ​​cellulose ethers i ka hoʻonohonoho, akā hoʻopaneʻe hoʻi i ke kaʻina hana paʻakikī o ka ʻōnaehana sima. ʻAʻole hilinaʻi wale ka hopena hoʻihoʻi o ka cellulose ether i kona ʻike ʻana i ka ʻōnaehana gel mineral, akā i ke ʻano kemika. ʻO ke kiʻekiʻe o ka methylation o HEMC, ʻoi aku ka maikaʻi o ka hopena retardation o cellulose ether. ʻOi aku ka ikaika o ka hopena lohi. Eia nō naʻe, ʻaʻohe hopena liʻiliʻi o ka viscosity o cellulose ether i nā kinetics hydration o ka sima. Me ka hoʻonui ʻana o ka ʻike cellulose ether, hoʻonui nui ka manawa hoʻonohonoho o ka mortar. Loaʻa ka pilina nonlinear maikaʻi ma waena o ka manawa hoʻonohonoho mua o ka mortar a me ka maʻiʻo o ka cellulose ether, a ʻo ka manawa hoʻonohonoho hope loa he pilina laina maikaʻi me ka ʻike o ka cellulose ether. Hiki iā mākou ke hoʻomalu i ka manawa hana o ka mortar ma ka hoʻololi ʻana i ka ʻike o ka cellulose ether. I ka huahana, hoʻokani ia i ke kuleana o ka mālama ʻana i ka wai, ka mānoanoa, ka hoʻopaneʻe ʻana i ka mana hydration cement, a me ka hoʻomaikaʻi ʻana i ka hana hana. ʻO ka hiki ke hoʻopaʻa wai maikaʻi e hana i ka calcium gypsum ash calcium, hoʻonui nui i ka viscosity pulu, hoʻomaikaʻi i ka ikaika paʻa o ka mortar, a i ka manawa like hiki ke hoʻomaikaʻi maikaʻi i ka ikaika tensile a me ka ikaika shear, e hoʻomaikaʻi nui i ka hopena kūkulu a me ka hana pono. Manawa hiki ke hooponopono. Hoʻomaikaʻi i ka hoʻoulu ʻana a i ʻole pumpability o ka mortar, a me ka ikaika o ke kūkulu ʻana. Ma ke kaʻina hana noi maoli, pono ia e hoʻoholo i ke ʻano, viscosity, a me ka nui o ka cellulose e like me nā huahana like ʻole, nā hana kūkulu, a me ke kaiapuni.