Loaʻa i ka cellulose ether ka paʻa wai maikaʻi loa, hiki ke pale i ka makū i loko o ka mortar pulu mai ka mahu mua ʻana a i ʻole ka omo ʻia e ka papa kumu, a hōʻoia i ka hoʻomaʻū piha ʻia o ka sima, a laila e hōʻoia hope ana i nā waiwai mechanical o ka mortar, he mea pono loa ia no ka mortar papa lahilahi a me nā papa kumu omo wai a i ʻole ka mortar i kūkulu ʻia ma lalo o ke ʻano wela a me nā kūlana maloʻo. Hiki i ka hopena paʻa wai o ka cellulose ether ke hoʻololi i ke kaʻina hana kūkulu kuʻuna a hoʻomaikaʻi i ka holomua o ke kūkulu ʻana. No ka laʻana, hiki ke hana ʻia ke kūkulu ʻana i ka plastering ma nā substrates omo wai me ka ʻole o ka pulu mua ʻana.
ʻO ka viscosity, ka dosage, ka mahana ambient a me ke ʻano molekala o ka cellulose ether he mana nui ia i kāna hana paʻa wai. Ma lalo o nā kūlana like, ʻo ka nui o ka viscosity o ka cellulose ether, ʻoi aku ka maikaʻi o ka paʻa wai; ʻo ke kiʻekiʻe o ka dosage, ʻoi aku ka maikaʻi o ka paʻa wai. ʻO ka maʻamau, hiki i kahi liʻiliʻi o ka cellulose ether ke hoʻomaikaʻi nui i ka paʻa wai o ka mortar. Ke hiki ka dosage i kahi kikoʻī Ke piʻi ka pae o ka paʻa wai, lohi ke ʻano o ka paʻa wai; ke piʻi ka mahana ambient, emi pinepine ka paʻa wai o ka cellulose ether, akā ʻoi aku ka maikaʻi o ka paʻa wai o kekahi mau cellulose ethers i hoʻololi ʻia ma lalo o nā kūlana wela kiʻekiʻe; ʻoi aku ka maikaʻi o ka hana paʻa wai o nā fibers me nā kekelē haʻahaʻa o ka pani ʻana ʻo Vegan ether.
ʻO ka hui hydroxyl ma ka molekole cellulose ether a me ka ʻātoma oxygen ma ka pilina ether e hui pū me ka molekole wai e hana i kahi pilina hydrogen, e hoʻohuli ana i ka wai manuahi i wai paʻa, no laila e pāʻani ana i kahi kuleana maikaʻi i ka paʻa ʻana o ka wai; ʻo ka molekole wai a me ke kaulahao molekole cellulose ether Interdiffusion e ʻae i nā molekole wai e komo i loko o ke kaulahao macromolecular cellulose ether a ua kau ʻia i nā mana paʻa ikaika, no laila e hana ana i ka wai paʻa a me ka wai i hoʻopaʻa ʻia, kahi e hoʻomaikaʻi ai i ka paʻa ʻana o ka wai o ka slurry sima; hoʻomaikaʻi ka cellulose ether i ka slurry sima hou. ʻO nā waiwai rheological, ka hoʻonohonoho pūnaewele porous a me ke kaomi osmotic a i ʻole nā waiwai hana kiʻiʻoniʻoni o ka cellulose ether e pale aku i ka hoʻolaha ʻana o ka wai.
Hāʻawi ka cellulose ether i ka mortar pulu me ka viscosity maikaʻi loa, hiki ke hoʻonui nui i ka hiki ke hoʻopaʻa ma waena o ka mortar pulu a me ka papa kumu, a hoʻomaikaʻi i ka hana anti-sagging o ka mortar. Hoʻohana nui ʻia ia i ka mortar plastering, ka mortar bonding brick a me ka ʻōnaehana insulation paia waho. Hiki i ka hopena mānoanoa o ka cellulose ether ke hoʻonui i ka hiki anti-dispersion a me ka homogeneity o nā mea i hui hou ʻia, pale i ka delamination mea, ka hoʻokaʻawale a me ke kahe ʻana o ke koko, a hiki ke hoʻohana ʻia i ka fiber concrete, ka concrete underwater a me ka concrete self-compacting.
ʻO ka hopena mānoanoa o ka cellulose ether ma nā mea i hoʻokumu ʻia i ka sima mai ka viscosity o ka 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 kiʻekiʻe loa ka viscosity, e hoʻopilikia ia i ka wai a me ka hana o ka mea (e like me ke kau ʻana i ka pahi plastering). ʻO ka mortar leveling ponoʻī a me ka sima hoʻopaʻa ponoʻī, e pono ai ka wai kiʻekiʻe, pono 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 o ka hopena cellulose ether e pili ana i kēia mau mea: ke kaumaha molekala o ka cellulose ether, ka noʻonoʻo ʻana, ka mahana, ka wikiwiki o ka shear a me ke ʻano hoʻāʻo. Ma lalo o nā kūlana like, ʻo ka nui o ke kaumaha molekala o ka cellulose ether, ʻo ka kiʻekiʻe o ka viscosity o ka hopena; ʻo ke kiʻekiʻe o ka noʻonoʻo ʻana, ʻo ka kiʻekiʻe o ka viscosity o ka hopena. I ka wā e hoʻohana ai, pono e mālama pono e pale i ka nui o ka dosage a hoʻopilikia i ka hana o ka mortar a me ka sima; cellulose ether E emi ana ka viscosity o ka hopena ether me ka piʻi ʻana o ka mahana, a ʻo ke kiʻekiʻe o ka noʻonoʻo ʻana, ʻo ka nui o ka mana o ka mahana; ʻO ka hopena cellulose ether he wai pseudoplastic me ka waiwai o ka shear thinning, ʻo ka nui o ka shear rate i ka wā o ka hoʻāʻo ʻana, ʻo ka liʻiliʻi o ka viscosity, no laila, e emi ana ka cohesion o ka mortar ma lalo o ka hana o ka ikaika o waho, he mea maikaʻi ia no ke kūkulu ʻana o ka mortar, i hiki i ka mortar ke loaʻa ka hana maikaʻi a me ka cohesion i ka manawa like; no ka mea, ʻaʻole Newtonian ka hopena cellulose ether No nā wai, i ka wā e ʻokoʻa ai nā ʻano hoʻokolohua, nā mea hana a me nā lako a i ʻole nā wahi hoʻāʻo i hoʻohana ʻia e hoʻāʻo i ka viscosity, e ʻokoʻa loa nā hopena hoʻāʻo o ka hopena cellulose ether like.
Hiki i nā molekala cellulose ether ke hoʻopaʻa i kekahi mau molekala wai o ka mea hou ma ka ʻaoʻao o ke kaulahao molekala, a laila e hoʻonui ai i ka viscosity o ka hopena. Hoʻopili ʻia nā kaulahao molekala o ka cellulose ether e hana i kahi ʻano pūnaewele ʻekolu-dimensional, kahi e hana ai i kāna hopena wai i ka viscosity maikaʻi.
ʻO ka wai hoʻoheheʻe wai cellulose ether kiʻekiʻe-viscosity he thixotropy kiʻekiʻe, ʻo ia hoʻi kekahi ʻano nui o ka cellulose ether. ʻO nā wai hoʻoheheʻe wai o ka methyl cellulose he pseudoplastic a me ka non-thixotropic fluidity ma lalo o kona mahana gel, akā hōʻike i nā waiwai kahe Newtonian ma nā helu shear haʻahaʻa. Hoʻonui ka Pseudoplasticity me ke kaumaha molekala a i ʻole ka nui o ka cellulose ether, me ka nānā ʻole i ke ʻano o ka substituent a me ke kekelē o ka pani ʻana. No laila, ʻo nā cellulose ethers o ka papa viscosity like, ʻaʻohe mea mc, HPmc, HEmc, e hōʻike mau i nā waiwai rheological like inā e mālama mau ʻia ka nui a me ka mahana. Hoʻokumu ʻia nā gels structural i ka wā e hoʻokiʻekiʻe ʻia ai ka mahana, a loaʻa nā kahe thixotropic kiʻekiʻe. Hōʻike nā cellulose ethers kiʻekiʻe a me ka viscosity haʻahaʻa i ka thixotropy ma lalo o ka mahana gel. He pōmaikaʻi nui kēia waiwai i ka hoʻoponopono ʻana i ka pae ʻana a me ka sagging i ke kūkulu ʻana i ka mortar hale. Pono e wehewehe 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 ʻana o kona solubility, kahi hopena maikaʻi ʻole i ka nui o ka mortar a me ka hana kūkulu. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka maopopo o ka hopena mānoanoa ma ka mortar, akā ʻaʻole ia he kūlike loa. ʻO kekahi viscosity waena a me ka haʻahaʻa, akā ʻoi aku ka maikaʻi o ka hana o ka cellulose ether i hoʻololi ʻia i ka hoʻomaikaʻi ʻana i ka ikaika kūkulu o ka mortar pulu. Me ka hoʻonui ʻia o ka viscosity, hoʻomaikaʻi ka paʻa ʻana o ka wai o ka cellulose ether.
Ka manawa hoʻouna: Pepeluali-28-2023