ʻO ka hopena mānoanoa o ka cellulose ether e pili ana i: ke degere o ka polymerization o ka cellulose ether, ka hoʻonā hopena, ka shear rate, ka mahana a me nā kūlana ʻē aʻe.ʻO ka waiwai gelling o ka hopena he waiwai ia o ka alkyl cellulose a me kāna mau mea i hoʻololi ʻia.ʻO nā waiwai gelation e pili ana i ke kiʻekiʻe o ka hoʻololi, ka hoʻonā hoʻonā a me nā mea hoʻohui.No nā derivatives hoʻololi hydroxyalkyl, pili pū nā waiwai gel i ka pae hoʻololi o ka hydroxyalkyl.No ka haʻahaʻa viscosity MC a me HPMC, 10% -15% hoʻonā hiki ke hoomakaukau, waena viscosity MC a me HPMC hiki ke hoomakaukau 5% -10% solution, oiai kiʻekiʻe viscosity MC a me HPMC hiki ke hoomakaukau wale 2% -3% solution, a maʻamau. ʻO ka viscosity classification o cellulose ether ua helu pū ʻia e 1% -2% solution.
High molecular kaumaha cellulose etera i kiʻekiʻe thickening pono.I loko o ka hoʻonā hoʻonaʻauao hoʻokahi, ʻokoʻa nā polymers me nā kaupaona molekala like ʻole.Degere kiʻekiʻe.Hiki ke hoʻokō ʻia ka viscosity target ma o ka hoʻohui ʻana i ka nui o ka cellulose ether kaumaha haʻahaʻa.ʻO kona viscosity he mea liʻiliʻi ka hilinaʻi ʻana i ka helu shear, a hiki i ka viscosity kiʻekiʻe i ka viscosity target, a he liʻiliʻi ka nui o ka hoʻohui ʻana, a ʻo ka viscosity e pili ana i ka pono thickening.No laila, no ka hoʻokō ʻana i kahi kūlike, pono e hōʻoia i kahi nui o ka cellulose ether (concentration of the solution) a me ka viscosity solution.ʻO ka mahana gel o ka hopena e emi iho ana me ka hoʻonuiʻia o ka hoʻonāʻana o ka hopena, a me nā gels i ka mahana wela ma hope o ka hikiʻana i kahi hoʻolālā.He kiʻekiʻe ka ʻike gelling o HPMC ma ka lumi wela.
Hiki ke hoʻololi ʻia ke kūlike ma ke koho ʻana i ka nui o ka ʻāpana a me ke koho ʻana i nā cellulose ethers me nā pae like ʻole o ka hoʻololi.ʻO ka mea i kapa ʻia ʻo ka hoʻololi ʻana ʻo ia ka hoʻokomo ʻana i kahi pae o ka hoʻololi ʻana o nā pūʻulu hydroxyalkyl ma ke ʻano iwi o MC.Ma ka hoʻololi ʻana i nā waiwai hoʻololi pili o nā mea pani ʻelua, ʻo ia hoʻi, nā waiwai hoʻololi pili pili DS a me ms o nā pūʻulu methoxy a me hydroxyalkyl a mākou e ʻōlelo pinepine ai.Hiki ke loaʻa nā koi hana like ʻole o ka cellulose ether ma o ka hoʻololi ʻana i nā waiwai hoʻololi pili o nā mea pani ʻelua.
ʻO ka pilina ma waena o ke kūpaʻa a me ka hoʻololi ʻana: ʻo ka hoʻohui ʻana o ka cellulose ether e pili ana i ka hoʻohana ʻana i ka wai o ka mortar, hoʻololi i ka ratio wai-binder o ka wai a me ka sima ka hopena mānoanoa, ʻoi aku ka kiʻekiʻe o ka dosage, ʻoi aku ka nui o ka inu wai.
Pono e hoʻoheheʻe koke ʻia nā cellulose ethers i hoʻohana ʻia i nā mea kūkulu hale pauka i ka wai anuanu a hāʻawi i kahi kūlike kūpono no ka ʻōnaehana.Inā hā'awi 'ia i ka nui o ka shear rate, e lilo mau ana ia i ka flocculent a me ka colloidal block, 'o ia ho'i kahi huahana i 'oi aku ka maika'i 'ole.
Aia kekahi pilina laina maikaʻi ma waena o ke kūlike o ka paʻi sima a me ke ʻano o ka cellulose ether.Hiki i ka cellulose ether ke hoʻonui nui i ka viscosity o ka mortar.ʻO ka nui o ka dosage, ʻoi aku ka maopopo o ka hopena.Loaʻa ka thixotropy kiʻekiʻe o ka cellulose ether aqueous solution, ʻo ia hoʻi kahi ʻano nui o ka cellulose ether.Loaʻa ka wai wai o nā polimer MC i ka wai pseudoplastic a me ka non-thixotropic ma lalo o ko lākou wela gel, akā nā waiwai kahe o Newtonian ma nā ʻāpana ʻoki haʻahaʻa.Hoʻonui ka Pseudoplasticity me ka paona molekala a i ʻole ka ʻike ʻana o ka cellulose ether, me ka nānā ʻole i ke ʻano o ka mea pani a me ke degere o ka hoʻololi.No laila, nā cellulose ethers o ka like viscosity grade, ʻaʻohe mea MC, HPMC, HEMC, e hōʻike mau i nā waiwai rheological like me ka lōʻihi o ka mālama ʻana a me ka mahana.
Hoʻokumu ʻia nā gels Structural i ka wā e piʻi aʻe ai ka mahana, a hiki mai nā kahe thixotropic kiʻekiʻe.Hōʻike ka ʻike kiʻekiʻe a me ka haʻahaʻa viscosity cellulose ethers 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, ʻoi aku ka kiʻekiʻe o ka viscosity o 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 o ka cellulose ether, a me ka emi ʻana o kona solubility, he hopena maikaʻi ʻole. e pili ana i ka hoʻopaʻa ʻana o ka mortar a me ka hana hana.ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka maopopo o ka hopena mānoanoa ma ka mortar, akā ʻaʻole ia i kūlike loa.ʻO kekahi haʻahaʻa haʻahaʻa a me ka viscosity, akā ʻoi aku ka maikaʻi o ka cellulose ether i hoʻololi ʻia i ka hoʻomaikaʻi ʻana i ka ikaika o ka mortar pulu.Me ka piʻi ʻana o ka viscosity, hoʻomaikaʻi ka paʻa wai o ka cellulose ether.
Ka manawa hoʻouna: Feb-16-2023