Hōʻuluʻulu manaʻo:
Ma ke ʻano he mea hoʻohui koʻikoʻi i loko o ka tile adhesives, he mana koʻikoʻi ka cellulose ether i ke kaha kiʻi ʻana a me ka manawa wehe o nā tile adhesives, a ʻo kēia mau mea ʻelua he mau hōʻailona koʻikoʻi nō hoʻi nā mea hoʻopili tile kiʻekiʻe. Hōʻuluʻulu ʻia a loiloi ʻia nā hopena o nā ethers i nā waiwai o ka tile adhesives.
Cellulose ether; Ka ikaika hukihuki; Hāmama ka manawa
1 Hoolauna
ʻO ka hoʻopili ʻana i ka tile i hoʻopaʻa ʻia i kēia manawa ka noi nui loa o ka mortar maloʻo maloʻo kūikawā, i haku ʻia me ka sima ma ke ʻano he kumu cementitious mea a hoʻohui ʻia e nā aggregates graded, nā mea mālama wai, nā mea ikaika mua, ka pauka latex a me nā mea hoʻohui a i ʻole nā mea hoʻohui. huikau. ʻO ka maʻamau, pono e hui pū ʻia me ka wai ke hoʻohana ʻia. Ke hoʻohālikelike ʻia me ka mortar sima maʻamau, hiki iā ia ke hoʻomaikaʻi nui i ka ikaika hoʻopaʻa ʻana ma waena o ka mea e alo ana a me ka substrate, a he kūpaʻa paheʻe maikaʻi a me ka wai maikaʻi a me ka pale wai. Hoʻohana nui ʻia ia e hoʻopili i nā mea hoʻonaninani e like me ke kūkulu ʻana i nā tile o loko a me waho o ka pā, nā tile papahele, a me nā mea ʻē aʻe. ʻO ia ka mea i hoʻohana nui ʻia i kēia manawa ka mea hoʻopaʻa Tile.
ʻO ka manawa maʻamau ke hoʻokolokolo mākou i ka hana o ka tile adhesive, ʻaʻole mākou e hoʻolohe wale i kāna hana hana a me ka hiki ke anti-sliding, akā e hoʻolohe pū i kona ikaika mechanical a me ka manawa wehe. ʻO ka cellulose ether i loko o ka tile adhesive ʻaʻole pili wale i nā waiwai rheological o ka porcelain adhesive, e like me ka hana maʻemaʻe, ka pahi pipili, a me nā mea ʻē aʻe, akā he mana ikaika hoʻi i nā ʻano mechanical o ka tile adhesive.
2. Ka hopena i ka manawa hāmama o ka tile adhesive
Ke noho pū nei ka pauda lāʻau a me ka cellulose etera i loko o ka mortar pulu, hōʻike kekahi mau hiʻohiʻona ʻikepili i ʻoi aku ka ikaika o ka ikehu kinetic e hoʻopili ai i nā huahana hydration cement, a ʻoi aku ka nui o ka cellulose ether i loko o ka wai interstitial, kahi e hoʻopili ai i ka viscosity Mortar a me ka manawa hoʻonohonoho. ʻOi aku ka kiʻekiʻe o ka ʻili o ka cellulose ether ma mua o ka pauka lāʻau, a ʻoi aku ka hoʻonui ʻana o ka cellulose ether ma ka mortar interface i ka hoʻokumu ʻana i nā paʻa hydrogen ma waena o ka ʻili kumu a me ka cellulose ether.
I loko o ka mortar pulu, evaporates ka wai i loko o ka mortar, a hoʻonuiʻia ka cellulose ether ma luna o kaʻili, a e hanaʻia kahi kiʻiʻoniʻoni ma luna o ka ili o ka pahū i loko o 5 mau minuke, e hoʻemi ana i ka helu evaporation ma hope, no ka mea, nui ka wai. wehe 'ia mai ka mānoanoa manoanoa hapa o ia e neʻe aku i ka thinner mortar papa, a me ka kiʻiʻoniʻoni i hanaia ma ka hoʻomaka 'ana i hapa hoʻoheheʻe, a me ka neʻeʻana o ka wai e lawe hou cellulose etera enrichment ma luna o ka mortar ili. E like me ka mea i hōʻike ʻia ma ke Kiʻi 1
No laila, ʻo ka hoʻokumu ʻana o ke kiʻiʻoniʻoni o cellulose ether ma ka ʻili o ka mortar he mana nui i ka hana o ka mortar. 1) He lahilahi loa ka kiʻiʻoniʻoni i hana ʻia a hoʻoheheʻe ʻia ʻelua, ʻaʻole hiki ke kaupalena i ka hoʻoheheʻe ʻana o ka wai a hoʻemi i ka ikaika. 2) ʻO ke kiʻiʻoniʻoni i hoʻokumu ʻia he mānoanoa loa, ʻo ke kiʻekiʻe o ka cellulose ether i loko o ka wai interstitial mortar he kiʻekiʻe, kiʻekiʻe ka viscosity, a ʻaʻole maʻalahi ke wāwahi i ka kiʻiʻoniʻoni i ka wā i hoʻopili ʻia ai nā tile. Hiki ke ʻike ʻia he ʻoi aku ka nui o ka hopena o ka hana kiʻiʻoniʻoni o cellulose ether i ka manawa wehe.
ʻO keʻano o ka cellulose ether (HPMC, HEMC, MC, a me nā mea'ē aʻe) a me ka degere o ka etherification (substitution degree) pili pono i nā mea hana kiʻiʻoniʻoni o cellulose ether, a me ka paʻakikī a me ka paʻakikī o ke kiʻi.
ʻO ke kūlana o ka neʻe ʻana o cellulose ether i loko o ka mortar pulu (ʻo ka ʻaoʻao luna he tile ceramic paʻa, ʻo ka ʻaoʻao haʻahaʻa ʻo ka porous concrete base)
3 Ka hopena i ka ikaika huki
Ma waho aʻe o ka hāʻawi ʻana i nā waiwai pono i ʻōlelo ʻia ma luna o ka mortar, ke hoʻopaneʻe nei ka cellulose ether i nā kinetics hydration o ka sima. ʻO kēia hopena hoʻopaneʻe ma muli o ka adsorption o nā molekole cellulose ether ma nā ʻano mineral like ʻole i ka ʻōnaehana cement e hydrated, akā ma ka ʻōlelo maʻamau, ʻo ka ʻae ʻana ʻo ka cellulose ether mole e hoʻopili nui ʻia i ka wai e like me CSH a me ka calcium hydroxide. Ma nā huahana kemika, ʻaʻole hiki ke hoʻopili ʻia ma ka māhele mineral mua o ka clinker. Eia kekahi, hoʻemi ka cellulose ether i ka neʻe ʻana o nā ion (Ca2+, SO42-, ...) i loko o ka hopena pore ma muli o ka piʻi ʻana o ka viscosity o ka solution pore, a laila e hoʻopaneʻe hou i ke kaʻina hydration.
ʻO ka Viscosity kekahi mea koʻikoʻi nui, e hōʻike ana i nā ʻano kemika o cellulose ether. E like me ka mea i ʻōlelo ʻia ma luna nei, pili nui ka viscosity i ka hiki ke paʻa i ka wai a he hopena nui hoʻi i ka hana o ka mortar hou. Eia naʻe, ua ʻike nā haʻawina hoʻokolohua ʻaʻohe hopena o ka viscosity o cellulose ether i nā kinetics hydration cement. He liʻiliʻi ka hopena o ka paona molekula i ka hydration, a ʻo ka ʻokoʻa nui ma waena o nā kaupaona molekala ʻokoʻa he 10min wale nō. No laila, ʻaʻole ʻo ke kaumaha o ka molekala he mea nui e hoʻomalu ai i ka hydration sima.
ʻO ke ʻano maʻamau ʻo ia no ka MHEC, ʻoi aku ka kiʻekiʻe o ka methylation, ʻoi aku ka liʻiliʻi o ka hopena o ka cellulose ether. Eia kekahi, ʻoi aku ka ikaika o ka hopena hoʻihoʻi o ka hydrophilic substitution (e like me ka hoʻololi ʻana iā HEC) ma mua o ka hoʻololi ʻana i ka hydrophobic (e like me ka hoʻololi ʻana iā MH, MHEC, MHPC). Hoʻopili nui ʻia ka hopena o ka cellulose ether e nā ʻāpana ʻelua, ke ʻano a me ka nui o nā pūʻulu substituent.
Ua ʻike pū kā mākou mau hoʻokolohua ʻōnaehana he kuleana koʻikoʻi ka ʻike o nā substituent i ka ikaika mechanical o nā mea hoʻopili tile. Ua loiloi mākou i ka hana o ka HPMC me nā degere like ʻole o ka hoʻololi ʻana i nā tile adhesives, a ua hoʻāʻo i ka hopena o ka cellulose ethers i loaʻa nā hui like ʻole ma lalo o nā kūlana hoʻōla like ʻole ma ka ʻO ka hopena o nā mea mechanical o nā tile adhesives, Figure 2 a me Figure 3 nā hopena o nā loli. i loko o ka methoxyl (DS) maʻiʻo a me ka hydroxypropoxyl (MS) maʻiʻo ma luna o ka huki-waho waiwai o ka tile adhesive ma ka lumi wela.
I ka hoʻāʻo ʻana, manaʻo mākou i ka HPMC, ʻo ia ka ether hui, no laila pono mākou e hoʻohui i nā kiʻi ʻelua. No ka HPMC, pono ia i kekahi degere o ka absorption e hōʻoia i kona solubility wai a me ka māmā transmittance. ʻIke mākou i ka ʻike o nā substituent Hoʻoholo ia i ka mahana gel o HPMC, kahi e hoʻoholo ai i ka hoʻohana ʻana o HPMC. Ma kēia ʻano, hoʻonohonoho ʻia ka ʻike o ka hui o HPMC e pili mau ana i loko o kahi ākea. Ma kēia pae, pehea e hui pū ai i ka methoxy a me ka hydroxypropoxy I mea e loaʻa ai ka hopena maikaʻi loa ka ʻike o kā mākou noiʻi. I loko o kahi kikoʻī, ʻo ka hoʻonui ʻana i ka ʻike o nā pūʻulu methoxyl e alakaʻi i kahi hiʻohiʻona i lalo o ka ikaika huki, aʻo ka hoʻonui ʻana i ka ʻike o nā hui hydroxypropoxyl e alakaʻi i ka hoʻonui ʻana i ka ikaika huki. Loaʻa ka hopena like no nā hola wehe. ʻO ka hopena o ka HPMC me nā ʻokoʻa substituent ʻokoʻa i nā waiwai mechanical ma lalo o ke kūlana o ka manawa wehe o 20 mau minuke.
ʻO keʻano hoʻololi o ka ikaika mechanical ma lalo o ke kūlana manawa hāmama e kūlike me ke kūlana mahana maʻamau, i kūlike me ka paʻakikī o ke kiʻi cellulose ether a mākou i kamaʻilio ai ma ka Māhele 2. ʻO ka mea o ka methoxyl (DS) he kiʻekiʻe a me ka maʻiʻo. ʻO ka hydroxypropoxyl HPMC me ka haʻahaʻa (MS) maʻiʻo he maikaʻi ka paʻakikī o ke kiʻiʻoniʻoni, akā e hoʻopili ia i ka pulu o ka mortar pulu i ka mea ili.
4 Hōʻuluʻulu manaʻo
ʻO nā ether cellulose, ʻoi aku ka nui o nā eter methyl cellulose e like me HEMC a me HPMC, he mau mea hoʻohui pono i nā noi mortar maloʻo. ʻO ka waiwai koʻikoʻi o ka cellulose ethers ko lākou paʻa wai i nā mea kūkulu hale. Inā ʻaʻole i hoʻohui ʻia ka cellulose ether, e maloʻo koke ka ʻāpana lahilahi o ka mortar hou, i hiki ʻole ke hoʻoheheʻe ʻia ka sima ma ke ʻano maʻamau, ʻaʻole hiki ke paʻakikī a ʻaʻole hiki ke loaʻa nā waiwai hoʻopaʻa maikaʻi i ka papa kumu. Nui nā mea e pili ana i ka paʻa ʻana o ka wai o ka cellulose ether, e like me ka dosage a me ka viscosity, a me kona ʻano i loko: ʻoi aku ka nui o ka hopena o ka hoʻololi ʻana i ka hana hope o ka mortar. No ka manawa lōʻihi, ua manaʻo mākou he mea koʻikoʻi ka viscosity o cellulose ether no nā mea hana sima. He hopena nui ka manawa hoʻonohonoho o ka sima. Ua ʻike nā haʻawina hou he liʻiliʻi ka hopena o ka hoʻololi ʻana o ka viscosity i ka manawa hoʻonohonoho o ka sima. ʻO ka mea ʻē aʻe, ʻo ke ʻano a me ka hui pū ʻana o nā pūʻulu substituent ka mea nui loa e pili ana i ka hana o ka cellulose ether. Ke manaʻo nei mākou i kahi huahana adhesive tile kiʻekiʻe, ʻaʻole wale mākou e noʻonoʻo i nā hoʻololi o ka waiwai rheological i lawe ʻia mai e cellulose ether, kahi e maʻalahi ai ka mortar, akā e noʻonoʻo pū i nā hopena mechanical o nā huahana cellulose ether me kahi pae kūpono. pani. hāʻawi.
Ka manawa hoʻouna: Feb-09-2023