ʻO nā hana o ka cellulose ether i loko o ka mortar: ka mālama ʻana i ka wai, hoʻonui i ka cohesion, mānoanoa, pili i ka manawa hoʻonohonoho, a me nā waiwai e komo i ka ea.Ma muli o kēia mau hiʻohiʻona, loaʻa iā ia kahi ākea ākea i ke kūkulu ʻana i ka mortar material.
1. ʻO ka paʻa ʻana o ka wai o cellulose ether ka mea nui loa i ka hoʻohana ʻana i ka mortar.
ʻO nā kumu nui e pili ana i ka paʻa ʻana o ka wai o cellulose ether: viscosity, particle size, dosage, active ingredient, dissolution rate, water retention mechanism: ka paʻa ʻana o ka wai o cellulose ether ponoʻī mai ka solubility a me ka dehydration o cellulose ether ponoʻī.ʻOiai he nui nā pūʻulu hydroxyl me nā waiwai hydration ikaika, ʻaʻole hiki ke hoʻoheheʻe ʻia i ka wai.ʻO kēia no ka mea he kiʻekiʻe ka crystallinity o ka hale cellulose, a ʻaʻole lawa ka hydration o nā hui hydroxyl wale nō e hoʻopau i nā paʻa intermolecular ikaika.ʻO nā paʻa hydrogen a me nā ikaika van der Waals, no laila e pehu wale nō akā ʻaʻole e hoʻoheheʻe i ka wai.Ke hoʻokomo ʻia kahi mea pani i loko o ke kaulahao molekala, ʻaʻole ʻo ka mea pani wale nō e uhaʻi i ka paʻa hydrogen, akā naʻe hoʻi ka mea hoʻopaʻa hydrogen interchain ma muli o ka wili ʻana o ka mea pani ma waena o nā kaulahao pili.ʻO ka nui o ka mea pani, ʻoi aku ka nui o ka mamao ma waena o nā molekala, kahi e hoʻopau ai i ka hopena paʻa hydrogen.ʻO ka nui o ka cellulose lattice, komo ka hopena ma hope o ka hoʻonuiʻana o ka cellulose lattice, a lilo ka cellulose ether i ka wai-soluble, e hana ana i kahi hopena kiʻekiʻe-viscosity.Ke piʻi ka mahana, nāwaliwali ka hydration o ka polymer, a kipaku ʻia ka wai ma waena o nā kaulahao.Ke lawa ka dehydration, hoʻomaka nā molekala e hōʻuluʻulu, e hana ana i kahi ʻano pūnaewele ʻekolu-dimensional a me ka ua gel.
(1) Ka hopena o ka nui o ka ʻāpana a me ka manawa hui ʻana o ka cellulose ether i ka paʻa ʻana o ka wai
Me ka nui o ka cellulose ether, hoʻonui ka paʻa ʻana o ka wai o ka mortar me ka piʻi ʻana o ka viscosity;ʻo ka hoʻonui ʻana i ka nui o ka cellulose ether a me ka piʻi ʻana o ka viscosity e hoʻonui i ka paʻa wai o ka mortar.Ke ʻoi aku ka nui o ka cellulose ether ma mua o 0.3%, ʻo ka hoʻololi ʻana o ka paʻa ʻana o ka wai mortar ke ʻano kaulike.ʻO ka mana paʻa wai o ka mortar ka nui o ka mālama ʻana i ka manawa hemo, a ʻoi aku ka wikiwiki o ka cellulose ether, a ʻoi aku ka wikiwiki o ka paʻa ʻana o ka wai.
(2) Ka hopena o ka pae o ka etherification o ka cellulose ether a me ka mahana ma ka paʻa ʻana o ka wai
Ke piʻi aʻe ka mahana, e emi ana ka paʻa ʻana o ka wai, a ʻoi aku ka kiʻekiʻe o ke kiʻekiʻe o ka etherification o cellulose ether, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai wela o cellulose ether.I ka wā e hoʻohana ai, ʻoi aku ka haʻahaʻa o ka mahana o ka mortar hou i hui ʻia ma mua o 35 ° C, a ma lalo o nā kūlana aniau kūikawā, hiki ke piʻi a ʻoi aku paha ka mahana ma mua o 40 ° C.I kēia hihia, pono e hoʻoponopono ʻia ke ʻano a koho ʻia ka huahana me kahi kiʻekiʻe o ka etherification.ʻO ia hoʻi, e noʻonoʻo e koho i kahi cellulose ether kūpono.
2. Ka hopena o ka cellulose ether ma luna o ka ea o ka mortar
I loko o nā huahana mortar maloʻo, ma muli o ka hoʻohui ʻana o ka cellulose ether, ua hoʻokomo ʻia kekahi ʻano o nā ʻōpū liʻiliʻi liʻiliʻi, hoʻohele like ʻia a paʻa i loko o ka mortar hou.Ma muli o ka hopena o ka pōleʻa o nā ʻōpū o ka ea, maikaʻi ka hana o ka mortar a hoʻemi i ka torsion o ka mortar.ʻO ka māwae a me ka emi ʻana, a hoʻonui i ka nui o ka hoʻopuka ʻana o ka mortar.
3. Ka hopena o ka cellulose ether ma ka hydration sima
ʻO ka cellulose ether ka hoʻihoʻi ʻana i ka hydration o ka mortar ciment-based, a ua hoʻonui ʻia ka hopena retardation me ka hoʻonui ʻana o ka cellulose ether content.ʻO nā mea e hoʻohuli ai i ka cellulose ether ma ka hoʻoheheʻe ʻana i ka cement: ʻano, ka pae o ka etherification, ke ʻano o ka sima.
Ka manawa hoʻouna: Feb-02-2023