ʻO nā hui hydroxyl ma lunaʻEtera celluloseʻO nā molekala a me nā ʻātoma oxygen ma nā pilina ether e hana i nā pilina hydrogen me nā molekala wai, e hoʻohuli 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 hoʻolaha like ʻana ma waena o nā molekala wai a me nā kaulahao molekala cellulose ether e ʻae i nā molekala wai e komo i loko o ke kaulahao macromolecular cellulose ether a e kau ʻia i nā palena ikaika, no laila e hana ana i ka wai manuahi a me ka wai i hoʻopili ʻia, kahi e hoʻomaikaʻi ai i ka paʻa ʻana o ka wai o ka slurry sima; Hoʻomaikaʻi ka cellulose ether i nā waiwai rheological, ka hoʻonohonoho pūnaewele porous a me ke kaomi osmotic o ka slurry sima hou a i ʻole nā waiwai hana kiʻiʻoniʻoni o ka cellulose ether e pale i ka hoʻolaha ʻana o ka wai.
ʻO ka paʻa ʻana o ka wai o ka cellulose ether ponoʻī mai ka solubility a me ka dehydration o ka cellulose ether ponoʻī. ʻAʻole lawa ka hiki ke hydration o nā hui hydroxyl wale nō e uku no nā pilina hydrogen ikaika a me nā mana van der Waals ma waena o nā molekala, no laila e pehu wale nō ia akā ʻaʻole e hoʻoheheʻe i ka wai. Ke hoʻokomo ʻia nā substituents i loko o ke kaulahao molekala, ʻaʻole wale nā substituents e luku i nā kaulahao hydrogen, akā ua luku ʻia nā pilina hydrogen interchain ma muli o ka wedging o nā substituents ma waena o nā kaulahao pili. ʻO ka nui o nā substituents, ʻoi aku ka nui o ka mamao ma waena o nā molekala, a ʻoi aku ka nui o ka hopena o ka luku ʻana i nā pilina hydrogen. Ma hope o ka pehu ʻana o ka cellulose lattice, komo ka hopena, a lilo ka cellulose ether i mea hoʻoheheʻe ʻia i ka wai, e hana ana i kahi hopena viscosity kiʻekiʻe, a laila e pāʻani i kahi kuleana i ka paʻa ʻana o ka wai.
Nā kumu e pili ana i ka hana paʻa wai:
ʻO ka mānoanoa: ʻO ka nui o ka mānoanoa o ka cellulose ether, ʻoi aku ka maikaʻi o ka hana paʻa wai, akā ʻo ke kiʻekiʻe o ka mānoanoa, ʻoi aku ke kiʻekiʻe o ke kaumaha molekala pili o ka cellulose ether, a emi iho kona solubility, kahi hopena maikaʻi ʻole i ka noʻonoʻo a me ka hana kūkulu o ka mortar. Ma ke ʻano laulā, no ka huahana like, ʻokoʻa loa nā hopena mānoanoa i ana ʻia e nā ʻano like ʻole, no laila i ka hoʻohālikelike ʻana i ka mānoanoa, pono e hana ʻia ma waena o nā ʻano hoʻāʻo like (me ka mahana, rotor, a pēlā aku).
Ka nui o ka hoʻohui: ʻO ka nui o ka nui o ka cellulose ether i hoʻohui ʻia i ka mortar, ʻoi aku ka maikaʻi o ka hana paʻa wai. ʻO ka maʻamau, hiki i kahi liʻiliʻi o ka cellulose ether ke hoʻomaikaʻi nui i ka nui o ka paʻa wai o ka mortar. Ke hiki ka nui i kahi pae, lohi ke ʻano o ka hoʻonui ʻana i ka nui o ka paʻa wai.
ʻO ka maikaʻi o nā ʻāpana: ʻO ka maikaʻi o nā ʻāpana, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai. Ke hoʻopili ʻia nā ʻāpana nui o ka cellulose ether me ka wai, hoʻoheheʻe koke ka ʻili a hana i kahi gel e kāʻei i ka mea e pale ai i nā mole wai mai ka hoʻomau ʻana i ke komo ʻana. I kekahi manawa, ʻoiai ka hoʻoulu lōʻihi ʻana, ʻaʻole hiki ke hoʻokō i ka hoʻolaha like a me ka hoʻoheheʻe ʻana, e hana ana i kahi hopena flocculent turbid a i ʻole ka agglomeration, kahi e hoʻopilikia nui ai i ka paʻa ʻana o ka wai o ka cellulose ether. ʻO ka solubility kekahi o nā kumu no ke koho ʻana i ka cellulose ether. ʻO ka fineness kekahi hōʻailona hana koʻikoʻi o ka methyl cellulose ether. Hoʻopilikia ka fineness i ka solubility o ka methyl cellulose ether. ʻO ka MC Coarser he granular a hiki ke hoʻoheheʻe maʻalahi i ka wai me ka ʻole o ka agglomeration, akā lohi loa ka helu hoʻoheheʻe a ʻaʻole kūpono ia no ka hoʻohana ʻana i ka mortar maloʻo.
Mahana: Ke piʻi aʻe ka mahana o ke ambient, emi pinepine ka paʻa ʻana o ka wai o nā cellulose ethers, akā ʻo kekahi mau cellulose ethers i hoʻololi ʻia he paʻa wai maikaʻi hoʻi ma lalo o nā kūlana mahana kiʻekiʻe; ke piʻi aʻe ka mahana, nāwaliwali ka hydration o nā polymers, a hoʻokuke ʻia ka wai ma waena o nā kaulahao. Ke lawa ka dehydration, hoʻomaka nā mole e hōʻuluʻulu e hana i kahi gel ʻōnaehana pūnaewele ʻekolu-dimensional.
ʻAno molekala: ʻOi aku ka maikaʻi o ka paʻa ʻana o ka wai i nā ethers cellulose me ka hoʻololi haʻahaʻa.
Ka mānoanoa a me ka thixotropy
Mānoanoa:
Hopena i ka hiki ke hoʻopaʻa a me ka hana anti-sagging: Hāʻawi nā ethers cellulose i ka viscosity maikaʻi loa o ka mortar pulu, hiki ke hoʻonui nui i ka hiki ke hoʻopaʻa o ka mortar pulu me ka papa kumu a hoʻomaikaʻi i ka hana anti-sagging o ka mortar. Hoʻohana nui ʻia ia i ka mortar plastering, tile bonding mortar a me ka ʻōnaehana insulation paia waho 3.
Hopena ma ka homogeneity mea: Hiki i ka hopena mānoanoa o nā ethers cellulose ke hoʻonui i ka hiki ke anti-dispersion a me ka homogeneity o nā mea i hui hou ʻia, pale i ka stratification mea, segregation a me ka seepage wai, a hiki ke hoʻohana ʻia i loko o ka sima fiber, ka sima wai a me ka sima hoʻopaʻa ponoʻī.
Kumu a me ka mana o ka hopena mānoanoa: ʻO ka hopena mānoanoa o ka cellulose ether ma nā mea sima e loaʻa 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 nā mea 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 me nā koi wai kiʻekiʻe e koi ana i ka viscosity haʻahaʻa loa o ka cellulose ether. Eia kekahi, ʻo ka hopena mānoanoa o ka cellulose ether e hoʻonui pū i ka koi wai o nā mea sima a hoʻonui i ka hana o ka mortar.
ʻO ka Thixotropy:
ʻO ka wai hoʻoheheʻe wai cellulose ether kiʻekiʻe-viscosity he thixotropy kiʻekiʻe, ʻo ia hoʻi kekahi ʻano nui o ka cellulose ether. ʻO ka wai hoʻoheheʻe wai o ka methyl cellulose he pseudoplasticity a me ka wai non-thixotropic ma lalo o kona mahana gel, akā hōʻike i nā waiwai kahe Newtonian ma nā helu shear haʻahaʻa. Hoʻonui ka Pseudoplasticity me ka hoʻonui ʻana o ke kaumaha molekala cellulose ether a i ʻole ka noʻonoʻo ʻana, a ʻaʻohe mea e pili ana i ke ʻano o ka substituent a me ke kekelē o ka pani. No laila, ʻo nā cellulose ethers o ka papa viscosity like, inā ʻo MC, HPMC, a i ʻole HEMC, e hōʻike mau i nā waiwai rheological like inā mau ka noʻonoʻo a me ka mahana. Ke piʻi ka mahana, hoʻokumu ʻia kahi gel structural, a hana ʻia kahi kahe thixotropic kiʻekiʻe. Hōʻike nā cellulose ethers me ka noʻonoʻo kiʻekiʻe a me ka viscosity haʻahaʻa i ka thixotropy ma lalo o ka mahana gel. He mea maikaʻi loa kēia waiwai no ka hoʻoponopono ʻana i ka pae a me ka sagging o ka mortar hale i ka wā o ke kūkulu ʻana.
Ka hoʻokomo ʻana i ka ea
Kumumanaʻo a me ka hopena ma ka hana hana: Loaʻa i ka Cellulose ether kahi hopena hoʻopaʻa ea koʻikoʻi ma nā mea sima hou. Loaʻa i ka Cellulose ether nā hui hydrophilic (nā hui hydroxyl, nā hui ether) a me nā hui hydrophobic (nā hui methyl, nā apo glucose). He surfactant me ka hana ʻili, no laila he hopena hoʻopaʻa ea. ʻO ka hopena hoʻopaʻa ea e hana i kahi hopena pōpō, hiki ke hoʻomaikaʻi i ka hana hana o nā 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 hoʻolaha ʻana o ka mortar; e hoʻonui pū ia i ka hana o ka mortar a hoʻemi i ke kumukūʻai hana o ka mortar.
Hopena ma nā waiwai mechanical: ʻO ka hopena o ka ea e hoʻonui i ka porosity o ka mea paʻakikī a hōʻemi i kona mau waiwai mechanical e like me ka ikaika a me ka modulus elastic.
Hopena ma ke kahe ʻana: Ma ke ʻano he surfactant, loaʻa i ka cellulose ether kahi hopena pulu a lubricating paha i nā ʻāpana sima, kahi e hui pū ai me kona hopena hoʻopaʻa ea e hoʻonui ai i ke kahe o nā mea sima, akā ʻo kona hopena mānoanoa e hōʻemi i ke kahe. ʻO ka hopena o ka cellulose ether ma ke kahe o nā mea sima he hui pū ʻana o nā hopena plasticizing a me ka mānoanoa. Ma ke ʻano laulā, i ka wā e haʻahaʻa loa ai ka nui o ka cellulose ether, ʻike nui ʻia ia ma ke ʻano he hopena plasticizing a i ʻole ka hōʻemi ʻana i ka wai; i ka wā e kiʻekiʻe ai ka nui, piʻi koke ka hopena mānoanoa o ka cellulose ether, a ʻo kona hopena hoʻopaʻa ea e hoʻomaʻalili ʻia, no laila e hōʻike ʻia ia ma ke ʻano he mānoanoa a hoʻonui paha i ka koi wai.
Ka manawa hoʻouna: Dec-23-2024