Ka hoʻomohala ʻana o ka HEMC cellulose ethers hou e hōʻemi i ka agglomeration i nā plasters i hoʻopaʻa ʻia i ka mīkini i hoʻopaʻa ʻia i ka gypsum.

Ka hoʻomohala ʻana o ka HEMC cellulose ethers hou e hōʻemi i ka agglomeration i nā plasters i hoʻopaʻa ʻia i ka mīkini i hoʻopaʻa ʻia i ka gypsum.

Ua hoʻohana nui ʻia ka Gypsum-based machine-sprayed plaster (GSP) ma Western Europe mai ka makahiki 1970.Ua hoʻomaikaʻi maikaʻi ka puka ʻana o ka mīkini hoʻoheheʻe ʻana i ka maikaʻi o ka hana plastering ʻoiai e hōʻemi ana i nā kumukūʻai kūkulu.Me ka hoʻonui ʻana o ka hoʻolaha ʻana o GSP, ua lilo ka cellulose ether i hoʻoheheʻe wai i mea hoʻohui kī.Hāʻawi ka cellulose ether i ka GSP me ka hana paʻa wai maikaʻi, kahi e kaupalena ʻia ai ka absorption o ka lepo i loko o ka plaster, a laila e loaʻa ai kahi manawa hoʻonohonoho paʻa a me nā waiwai mechanical maikaʻi.Eia hou, hiki i ka rheological curve o cellulose ether ke hoʻomaikaʻi i ka hopena o ka hoʻoheheʻe ʻana i ka mīkini a hoʻomaʻamaʻa nui i nā kaʻina o ka mortar leveling a me ka hoʻopau ʻana.

ʻOiai ka maikaʻi o ka cellulose ethers i nā noi GSP, hiki nō hoʻi ke kōkua i ka hoʻokumu ʻana o nā puʻupuʻu maloʻo i ka wā i hoʻopuʻi ʻia.Ua ʻike ʻia kēia mau puʻupuʻu wai ʻole ʻo ka clumping a i ʻole caking, a hiki iā lākou ke hoʻopilikia i ka pae ʻana a me ka hoʻopau ʻana o ka mortar.Hiki i ka Agglomeration ke hōʻemi i ka pono o ka pūnaewele a hoʻonui i ke kumukūʻai o nā noi huahana gypsum kiʻekiʻe.I mea e hoʻomaopopo maikaʻi ai i ka hopena o ka cellulose ethers i ka hoʻokumu ʻana i nā lumps i ka GSP, ua hana mākou i kahi noiʻi e hoʻāʻo e ʻike i nā ʻāpana huahana kūpono e hoʻoikaika i kā lākou hoʻokumu ʻana.Ma muli o nā hopena o kēia noiʻi, ua hoʻomohala mākou i kahi ʻano o nā huahana cellulose ether me ka hoʻohaʻahaʻa ʻana i ka agglomerate a loiloi iā lākou i nā noi kūpono.

Hua'ōlelo nui: cellulose ether;gypsum machine spray plaster;helu hoʻoheheʻe;morphology particle

1.Hoʻolauna

Ua hoʻohana maikaʻi ʻia nā cellulose ethers wai i ka gypsum-based machine-sprayed plasters (GSP) e hoʻoponopono i ka koi wai, hoʻomaikaʻi i ka mālama wai a hoʻomaikaʻi i nā waiwai rheological o nā mortar.No laila, kōkua ia i ka hoʻomaikaʻi ʻana i ka hana o ka mortar pulu, a laila e hōʻoiaʻiʻo ai i ka ikaika e pono ai o ka mortar.Ma muli o kāna mau waiwai kūʻai kūʻai a maikaʻi hoʻi, ua lilo ka hui maloʻo GSP i mea hoʻohana nui ʻia i loko o ʻEulopa i nā makahiki he 20 i hala.

ʻO nā mīkini no ka hui ʻana a me ka pīpī ʻana i ka GSP maloʻo ua kūleʻa maikaʻi ʻia no nā makahiki he mau makahiki.ʻOiai ʻokoʻa kekahi mau hiʻohiʻona ʻenehana o nā mea hana mai nā mea hana like ʻole, ʻae nā mīkini hoʻoheheʻe ʻia i ke kūʻai ʻana i kahi manawa hoʻouluulu liʻiliʻi no ka hui ʻana o ka wai me ka cellulose ether-containing gypsum dry-mix mortar.ʻO ka maʻamau, he mau kekona wale nō ke kaʻina hana hui.Ma hope o ka hui ʻana, hoʻomoʻi ʻia ka mortar maʻemaʻe ma o ka hose hoʻouna a hoʻoheheʻe ʻia ma ka paia substrate.Hoʻopau ke kaʻina hana i loko o hoʻokahi minuke.Eia nō naʻe, i loko o ia manawa pōkole, pono e hoʻopau loa ʻia nā cellulose ethers i mea e hoʻomohala piha ai i kā lākou mau waiwai i ka noi.ʻO ka hoʻohui ʻana i nā huahana cellulose ether i hoʻoheheʻe ʻia i ka hoʻoheheʻe ʻia ʻana o ka gypsum mortar e hōʻoia i ka hemo piha ʻana i kēia kaʻina hana.

Hoʻokumu ka cellulose ether i ka lepo maikaʻi i ke kūpaʻa wikiwiki i ka hoʻopili ʻana me ka wai i ka wā e hoʻoulu ai i ka sprayer.ʻO ka piʻi wikiwiki o ka viscosity ma muli o ka hoʻoheheʻe ʻana o ka cellulose ether ke kumu i nā pilikia me ka hoʻoheheʻe ʻana o ka wai o nā mea gypsum cementitious.I ka hoʻomaka ʻana o ka mānoanoa o ka wai, liʻiliʻi ka wai a ʻaʻole hiki ke komo i loko o nā pores liʻiliʻi ma waena o nā ʻāpana gypsum.Ma hope o ka hoʻopaʻa ʻia ʻana o nā pores, hoʻopaneʻe ʻia ke kaʻina hana hoʻomaʻemaʻe o nā ʻāpana cementitious e ka wai.ʻOi aku ka pōkole o ka manawa hui ʻana i ka sprayer ma mua o ka manawa i makemake ʻia e hoʻomaʻemaʻe piha i nā ʻāpana gypsum, kahi i hoʻokumu ʻia ai nā puʻupuʻu maloʻo maloʻo i loko o ka mīkini pulu hou.Ke hoʻokumu ʻia kēia mau puʻupuʻu, ke keʻakeʻa nei lākou i ka pono o nā limahana i nā kaʻina hana aʻe: paʻakikī loa ka hoʻohaʻahaʻa ʻana i ka mortar me nā puʻupuʻu a ʻoi aku ka manawa.ʻOiai ma hope o ke kau ʻana o ka mortar, hiki ke ʻike ʻia nā puʻupuʻu i hana mua ʻia.No ka laʻana, ʻo ka uhi ʻana i nā puʻupuʻu i loko i ka wā o ke kūkulu ʻana e alakaʻi i ke ʻano o nā wahi ʻeleʻele i ka pae hope, ʻaʻole mākou makemake e ʻike.

ʻOiai ua hoʻohana ʻia nā cellulose ethers e like me nā mea hoʻohui i ka GSP no nā makahiki he nui, ʻaʻole i aʻo nui ʻia ko lākou hopena i ka hoʻokumu ʻana i nā lumps unwetted i kēia manawa.Hōʻike kēia ʻatikala i kahi ala ʻōnaehana hiki ke hoʻohana ʻia e hoʻomaopopo i ke kumu kumu o ka agglomeration mai kahi hiʻohiʻona cellulose ether.

2. Nā kumu no ka hoʻokumu ʻana i nā ʻōpala i hoʻomaʻemaʻe ʻole ʻia ma GSP

2.1 Ka pulupulu ʻana i nā mea hoʻoheheʻe ʻia

I ka hoʻomaka ʻana o ka hoʻokumu ʻana i ka papahana noiʻi, ua hōʻuluʻulu ʻia kekahi mau kumu kumu no ka hoʻokumu ʻana i nā puʻupuʻu i ka CSP.Ma hope aʻe, ma o ka nānā ʻana i kōkua kamepiula, ʻike ʻia ka pilikia inā loaʻa kahi hopena ʻenehana kūpono.Ma o kēia mau hana, ua nānā mua ʻia ka hopena maikaʻi loa i ka hoʻokumu ʻana i nā agglomerates ma GSP.Mai nā noʻonoʻo ʻenehana a me nā ʻoihana, ua kāpae ʻia ke ala ʻenehana o ka hoʻololi ʻana i ka pulu ʻana o nā ʻāpana gypsum e ka mālama ʻana i ka ʻili.Mai ka manaʻo pāʻoihana, ua kāpae ʻia ka manaʻo o ka hoʻololi ʻana i nā mea hana e kū nei me kahi mea hoʻoheheʻe ʻia me kahi keʻena huikau i hoʻolālā ʻia e hiki ai ke hōʻoia i ka hui ʻana o ka wai a me ka mortar.

ʻO kahi koho ʻē aʻe, ʻo ia ka hoʻohana ʻana i nā mea hoʻomaʻemaʻe e like me nā mea hoʻohui i loko o nā ʻano plaster gypsum a ua loaʻa iā mākou kahi patent no kēia.Eia nō naʻe, ʻo ka hoʻohui ʻana o kēia mea hoʻohui inevitably hoʻopilikia i ka hana o ka plaster.ʻO ka mea nui, hoʻololi ia i nā waiwai kino o ka mortar, ʻoi aku ka paʻakikī a me ka ikaika.No laila, ʻaʻole mākou i komo hohonu.Eia kekahi, ua noʻonoʻo ʻia ka hoʻohui ʻana o nā mea hoʻohui wai i ka hopena maikaʻi ʻole i ke kaiapuni.

Ke noʻonoʻo nei i ka cellulose ether he ʻāpana ia o ka hoʻokumu ʻana i ka plaster gypsum, ʻo ka hoʻomaikaʻi ʻana i ka cellulose ether ponoʻī e lilo i ka hopena maikaʻi loa i hiki ke koho ʻia.I ka manawa like, ʻaʻole pono e hoʻopilikia i nā waiwai mālama wai a i ʻole e hoʻopilikia i nā waiwai rheological o ka plaster i hoʻohana ʻia.Ma muli o ke kuhiakau i manaʻo mua ʻia ʻo ka hana ʻana o nā pauka non-wetted ma GSP ma muli o ka piʻi wikiwiki ʻana o ka viscosity o cellulose ethers ma hope o ka hoʻopili ʻana me ka wai i ka wā e hoʻoulu ai, e kāohi ana i nā hiʻohiʻona dissolution o cellulose ethers i lilo i pahuhopu nui o kā mākou noiʻi. .

2.2 Hoʻopau i ka manawa o ka cellulose ether

ʻO kahi ala maʻalahi e hoʻolōʻihi i ka helu dissolution o cellulose ethers ʻo ka hoʻohana ʻana i nā huahana papa granular.ʻO ka hemahema nui o ka hoʻohana ʻana i kēia ala ma GSP, ʻaʻole hiki ke hoʻoheheʻe ʻia nā ʻāpana ʻeleʻele loa i loko o ka pukaaniani hoʻāla pōkole 10-kekona i loko o ka sprayer, e alakaʻi ana i ka nalowale o ka paʻa ʻana o ka wai.Eia kekahi, ʻo ka pehu ʻana o ka cellulose ether i ka wā hope e alakaʻi i ka mānoanoa ma hope o ka plastering a pili i ka hana hana, ʻo ia ka mea a mākou e makemake ʻole ai e ʻike.

ʻO kahi koho ʻē aʻe e hōʻemi i ka helu hoʻoheheʻe ʻana o nā cellulose ethers ʻo ia ka hoʻohuli hou ʻana i ka ʻili o ka cellulose ethers me ka glyoxal.Eia nō naʻe, ʻoiai ʻo ka hopena crosslinking ka pH-controlled, ka nui o ka hemo ʻana o nā cellulose ethers e hilinaʻi nui ʻia i ka pH o ka wai wai a puni.ʻO ka pH waiwai o ka ʻōnaehana GSP i hui pū ʻia me ka lime slaked he kiʻekiʻe loa, a ua wehe koke ʻia nā paʻa keʻa o ka glyoxal ma ka ʻili ma hope o ka hoʻopili ʻana i ka wai, a hoʻomaka koke ka viscosity.No laila, ʻaʻole hiki ke hoʻokō ʻia kēlā mau hana kemika i ka hoʻomalu ʻana i ka helu hoʻoheheʻe ʻana ma GSP.

ʻO ka manawa hoʻoheheʻe o nā cellulose ethers e pili pū ana i kā lākou morphology particle.Eia naʻe, ʻaʻole i loaʻa ka manaʻo nui o kēia ʻoiaʻiʻo i kēia manawa, ʻoiai he mea nui ka hopena.Loaʻa iā lākou ka laina hoʻoheheʻe laina mau [kg/(m2•s)], no laila ua kūlike ko lākou hoʻoheheʻe ʻana a me ke kūkulu ʻana i ka viscosity i ka ʻili i loaʻa.Hiki ke ʻano like ʻole kēia helu me nā loli i ka morphology o nā ʻāpana cellulose.I kā mākou helu ʻana, manaʻo ʻia ua loaʻa ka viscosity piha (100%) ma hope o 5 kekona o ka hoʻoulu ʻana i ka hui ʻana.

Ua hōʻike ʻia ka helu ʻana o nā morphologies particle like ʻole he 35% o ka viscosity spherical i ka hapalua o ka manawa hui.I ka manawa like, hiki i nā ʻāpana cellulose ether koʻokoʻo ke hiki i 10% wale nō.Ua hoʻomaka wale ka hoʻoheheʻe ʻana o nā ʻāpana like ʻole ma hope2.5 kekona.

Hoʻokomo pū ʻia nā hiʻohiʻona solubility kūpono no nā cellulose ethers i GSP.Hoʻopaneʻe i ka hoʻokumu ʻana o ka viscosity mua ma mua o 4.5 kekona.Ma hope iho, piʻi wikiwiki ka viscosity a hiki i ka viscosity hope i loko o 5 kekona o ka hoʻoulu ʻana i ka manawa hui.I loko o ka GSP, hiki i ka manawa lōʻihi o ka hoʻoheheʻe ʻana e hiki ai i ka ʻōnaehana ke loaʻa ka viscosity haʻahaʻa, a hiki i ka wai i hoʻohui ʻia ke hoʻomaʻemaʻe piha i nā ʻāpana gypsum a komo i nā pores ma waena o nā ʻāpana me ka ʻole o ka haunaele.

3. ʻO ka morphology o ke kino o ka cellulose ether

3.1 Ana o ka morphology particle

No ka mea he koʻikoʻi ko ke ʻano o nā ʻāpana cellulose ether i ka solubility, pono mua e hoʻoholo i nā ʻāpana e wehewehe ana i ke ʻano o nā ʻāpana cellulose ether, a laila e ʻike i nā ʻokoʻa ma waena o ka wai ʻole. .

Loaʻa iā mākou ka morphology particle o cellulose ether ma o ka ʻenehana loiloi kiʻi ikaika.Hiki ke hoʻohālikelike piha ʻia ka morphology particle o cellulose ethers me ka hoʻohana ʻana i kahi mea nānā kiʻi kiʻi kiʻi SYMPATEC (i hana ʻia ma Kelemānia) a me nā mea hana loiloi polokalamu kikoʻī.Ua ʻike ʻia nā ʻāpana koʻikoʻi koʻikoʻi ʻo ia ka lōʻihi awelika o nā fibers i hōʻike ʻia e like me LEFI (50,3) a me ke anawaena awelika i hōʻike ʻia e like me DIFI (50,3).Manaʻo ʻia ka ʻikepili awelika lōʻihi ʻo ia ka lōʻihi piha o kahi pāhola cellulose ether particle.

ʻO ka maʻamau, hiki ke helu ʻia nā ʻikepili puʻupuʻu nui e like me ka awelika fiber anawaena DIFI ma muli o ka helu o nā ʻāpana (hōʻike ʻia e 0), lōʻihi (hōʻike ʻia e 1), ʻāpana (hōʻike ʻia e 2) a i ʻole leo (denoted e 3).Hoʻokumu ʻia nā ana ʻikepili a pau ma kēia pepa i ka leo a no laila ua hōʻike ʻia me kahi suffix 3.No ka laʻana, ma DIFI(50,3), ʻo 3 ke ʻano o ka puʻunaue leo, a ʻo 50 ke ʻano o ka 50% o ka puʻupuʻu puʻupuʻu nui i ʻoi aku ka liʻiliʻi ma mua o ka waiwai i hōʻike ʻia, a ʻoi aku ka nui o ka 50% ma mua o ka waiwai i hōʻike ʻia.Hāʻawi ʻia ka ʻikepili o ke ʻano ʻāpana cellulose ether ma nā micrometers (µm).

3.2 Cellulose etera ma hope o ka morphology optimization

I ka noonoo ana i ka hopena o ka ili o ka ili, ka manawa o ka hoopau ana o ka cellulose etera me ke kookoo e like me ke ano o ke kino e hilinai nui ia ana ma ka awelika anawaena fiber DIFI (50,3).Ma muli o kēia manaʻo, ua manaʻo ʻia ka hana hoʻomohala ʻana i nā cellulose ethers i ka loaʻa ʻana o nā huahana me ka nui awelika fiber diameter DIFI (50,3) e hoʻomaikaʻi i ka solubility o ka pauka.

Eia naʻe, ʻaʻole i manaʻo ʻia ka piʻi ʻana o ka lōʻihi o ka fiber DIFI(50,3) me ka piʻi ʻana o ka nui o ka nui o ka nui.ʻO ka hoʻonui ʻana i nā ʻāpana ʻelua e hopena i nā ʻāpana nui ʻaʻole hiki ke hoʻoheheʻe loa i loko o ka manawa hoʻonāuki 10-kekona maʻamau o ka hoʻoheheʻe mechanical.

No laila, he hydroxyethylmethylcellulose maikaʻi (HEMC) pono e loaʻa i ka nui awelika fiber anawaena DIFI (50,3) i ka wā e mālama ana i ka lōʻihi o ka fiber LEFI (50,3).Hoʻohana mākou i kahi kaʻina hana cellulose ether hou e hana i kahi HEMC i hoʻomaikaʻi ʻia.He ʻokoʻa loa ke ʻano o ka ʻāpana o ka cellulose ether wai i loaʻa ma o kēia kaʻina hana mai ke ʻano o ka cellulose i hoʻohana ʻia ma ke ʻano he kumu no ka hana ʻana.I nā huaʻōlelo ʻē aʻe, hiki i ke kaʻina hana ke kūʻokoʻa i ka hoʻolālā ʻana o ke ʻano o ka cellulose ether i kāna mau mea hana.

ʻEkolu scanning electron microscope kiʻi: hoʻokahi o ka cellulose etera i hana ʻia e ke kaʻina hana maʻamau, a ʻo kekahi o ka cellulose ether i hana ʻia e ke kaʻina hana hou me ke anawaena nui o DIFI (50,3) ma mua o nā huahana mea hana maʻamau.Hōʻike pū ʻia ka morphology o ka cellulose lepo i hoʻohana ʻia i ka hana ʻana o kēia mau huahana ʻelua.

Ke hoʻohālikelike nei i nā micrographs electron o cellulose a me cellulose ether i hana ʻia e ke kaʻina hana maʻamau, maʻalahi ka ʻike ʻana he mau ʻano morphological like nā ʻelua.ʻO ka heluna nui o nā ʻāpana o nā kiʻi ʻelua e hōʻike ana i nā hana lōʻihi a lahilahi, e hōʻike ana ʻaʻole i loli nā hiʻohiʻona morphological ma hope o ka hopena o ka hopena kemika.Ua akaka loa ka pili pono ana o na ano morphology particle o na hua hana me na mea maka.

Ua ʻike ʻia he ʻokoʻa loa nā hiʻohiʻona morphological o ka cellulose ether i hana ʻia e ke kaʻina hana hou, ʻoi aku ka nui o ka awelika anawaena DIFI (50,3), a ke hōʻike nui nei i nā ʻāpana pōkole a me ka mānoanoa, ʻoiai nā ʻāpana lahilahi a lōʻihi. in cellulose maka mea Aneane pau.

Hōʻike hou kēia kiʻi i ka pili ʻole o ka morphology particle o nā cellulose ethers i hana ʻia e ke kaʻina hana hou i ka morphology o ka cellulose raw material - ʻaʻole e noho hou ka loulou ma waena o ka morphology o ka mea maka a me ka huahana hope loa.

4. Ka hopena o ka HEMC particle morphology i ka hoʻokumu ʻana i nā puʻupuʻu unwetted i GSP

Ua hoʻāʻo ʻia ʻo GSP ma lalo o nā kūlana noi kahua e hōʻoia i kā mākou kuhiakau e pili ana i ka mīkini hana (ʻo ka hoʻohana ʻana i kahi huahana cellulose ether me ka nui mean diameter DIFI (50,3) e hōʻemi i ka agglomeration makemake ʻole).Ua hoʻohana ʻia nā HEMC me nā anawaena mean DIFI(50,3) mai 37 µm a i 52 µm i kēia mau hoʻokolohua.I mea e hōʻemi ai i ka mana o nā mea ʻē aʻe ma waho o ka morphology particle, ua mālama ʻia ke kumu plaster gypsum a me nā mea hoʻohui ʻē aʻe ʻaʻole i loli.Ua mālama mau ʻia ka viscosity o ka cellulose ether i ka wā o ka hoʻāʻo (60,000mPa.s, 2% aqueous solution, ana ʻia me kahi rheometer HAAKE).

Ua hoʻohana ʻia kahi mea hoʻoheheʻe gypsum i kūʻai ʻia (PFT G4) no ka pīpī ʻana i nā hoʻokolohua noi.E noʻonoʻo i ka loiloi ʻana i ka hoʻokumu ʻana o nā puʻupuʻu unwetted o ka gypsum mortar ma hope koke o ka hoʻopili ʻia ʻana i ka paia.E hōʻike maikaʻi ʻia ka ʻokoʻa o ka hana ʻana o ka huahana ma ka loiloi ʻana i ka clumping ma kēia pae i ke kaʻina noi plastering.I ka ho'āʻo, ua helu nā limahana akamai i ke kūlana clumping, me 1 ka mea maikaʻi loa a ʻo 6 ka mea ʻino loa.

Hōʻike maopopo nā hopena hōʻike i ka pilina ma waena o ka awelika fiber anawaena DIFI (50,3) a me ka helu hana clumping.Kūlike me kā mākou kuhiakau e ʻoi aku ka nui o nā huahana cellulose ether me DIFI (50,3) liʻiliʻi ma mua o nā huahana liʻiliʻi DIFI (50,3), ʻo ka helu awelika no DIFI (50,3) o 52 µm he 2 (maikaʻi), aʻo ka poʻe me DIFI ( 50,3) o 37µm a me 40µm ka helu 5 (hāʻule).

E like me kā mākou i manaʻo ai, hilinaʻi nui ka hana clumping i nā noi GSP i ka awelika anawaena DIFI (50,3) o ka cellulose ether i hoʻohana ʻia.Eia kekahi, ua ʻōlelo ʻia ma ka kūkākūkā mua ʻana ma waena o nā ʻāpana morphological a pau DIFI (50,3) i hoʻopilikia ikaika i ka manawa hoʻohemo o nā pauka cellulose ether.Hōʻoia kēia i ka cellulose ether dissolution time, ka mea i hoʻopili nui ʻia me ka morphology particle, i ka hopena i ka hoʻokumu ʻana o nā clumps ma GSP.ʻO ka DIFI nui (50,3) ka mea e hoʻopau ai i ka manawa lōʻihi o ka pauka, kahi e hōʻemi nui ai i ka manawa o ka agglomeration.Eia nō naʻe, ʻo ka lōʻihi o ka pauka e hoʻoheheʻe ʻia e paʻakikī i ka cellulose ether e hoʻoheheʻe loa i loko o ka manawa hoʻoulu ʻia o ka mea hoʻoheheʻe.

ʻO ka huahana HEMC hou me kahi kiʻi hoʻoheheʻe maikaʻi ʻia ma muli o ka nui o ka awelika fiber diameter DIFI (50,3) ʻaʻole wale i ʻoi aku ka maikaʻi o ka pulu ʻana o ka pauka gypsum (e like me ka ʻike ʻia ma ka loiloi clumping), akā ʻaʻole pili i ka hana paʻa ʻana o ka wai. ka huahana.ʻO ka paʻa wai i ana ʻia e like me EN 459-2 ʻaʻole hiki ke ʻike ʻia mai nā huahana HEMC o ka viscosity like me DIFI (50,3) mai 37µm a i 52µm.ʻO nā ana a pau ma hope o 5 mau minuke a me 60 mau minuke e hāʻule i loko o ka laulā pono i hōʻike ʻia ma ka pakuhi.

Eia nō naʻe, ua hōʻoia pū ʻia inā ʻoi aku ka nui o DIFI (50,3), ʻaʻole e hoʻoheheʻe ʻia nā ʻāpana cellulose ether.Loaʻa kēia i ka wā e hoʻāʻo ai i kahi DIFI (50,3) o 59 µM huahana.ʻO nā hopena hoʻāʻo paʻa wai ma hope o 5 mau minuke a ʻoi aku hoʻi ma hope o 60 mau minuke ʻaʻole i hoʻokō i ka palena haʻahaʻa.

5. Hōʻuluʻulu manaʻo

He mau mea hoʻohui koʻikoʻi nā cellulose ethers i nā hoʻokumu GSP.Ke nānā nei ka hana noiʻi a me ka hoʻomohala ʻana i ka huahana i ka pilina ma waena o ka morphology particle o cellulose ethers a me ka hoʻokumu ʻana o nā puʻupuʻu unwetted clumps (i kapa ʻia ʻo clumping) ke hoʻopuʻi ʻia me ka mechanically.Hoʻokumu ʻia ia ma ka manaʻo o ka hana hana e pili ana ka manawa hoʻoheheʻe o ka pauka cellulose ether i ka pulu ʻana o ka pauka gypsum e ka wai a pēlā e hoʻopili ai i ka hoʻokumu ʻana o nā clumps.

ʻO ka manawa hoʻoheheʻe e pili ana i ka morphology particle o ka cellulose ether a hiki ke loaʻa me ka hoʻohana ʻana i nā mea hana kiʻi kiʻi kiʻi.I ka GSP, cellulose ethers me ka nui awelika anawaena o DIFI (50,3) ua optimized pauda dissolution hiʻona, e 'ae i ka manawa hou no ka wai e pulu pono i ka gypsum particles, pela e hiki ai i ka anti-agglomeration maikaʻi loa.Hana ʻia kēia ʻano cellulose ether me ka hoʻohana ʻana i kahi kaʻina hana hou, a ʻaʻole hilinaʻi kona ʻano ʻāpana i ke ʻano kumu o ka mea maka no ka hana ʻana.

ʻO ka awelika fiber diameter DIFI (50,3) he hopena koʻikoʻi loa ia ma ka clumping, i hōʻoia ʻia ma ka hoʻohui ʻana i kēia huahana i kahi kumu kūʻai ʻia i ka mīkini-sprayed gypsum base no ka hoʻoulu ʻana ma ka pūnaewele.Eia kekahi, ua hoʻopaʻa ʻia kēia mau hoʻāʻo ʻana o ka māla i kā mākou hopena lab: ʻo nā huahana cellulose ether maikaʻi loa me DIFI nui (50,3) i hoʻoheheʻe ʻia i loko o ka puka aniani o ka GSP agitation.No laila, ʻo ka huahana cellulose ether me nā waiwai anti-caking maikaʻi loa ma hope o ka hoʻomaikaʻi ʻana i ke ʻano o ka particle e mālama mau i ka hana paʻa wai.