Kodi kusungidwa kwa madzi kwa methyl cellulose ether (MC) ndi chiyani?

Kodi kusungidwa kwa madzi kwa methyl cellulose ether (MC) ndi chiyani?

Yankho: Mlingo wa kusungirako madzi ndi chimodzi mwa zizindikiro zofunika kwambiri zoyezera ubwino wa methyl cellulose ether, makamaka pakumanga kosanjikiza kwa simenti ndi matope a gypsum. Kusungidwa kwamadzi kolimbikitsidwa kumatha kuletsa bwino kutayika kwa mphamvu ndi kusweka chifukwa cha kuyanika kwambiri komanso kusakwanira kwamadzi. Kusungidwa bwino kwa madzi kwa methyl cellulose ether pansi pa kutentha kwakukulu ndi chimodzi mwa zizindikiro zofunika kusiyanitsa ntchito ya methyl cellulose ether. Nthawi zambiri, ma methyl cellulose ethers ambiri amachepetsa kusunga madzi pamene kutentha kumakwera. Kutentha kumakwera kufika ku 40 ° C, kusungirako madzi kwa methyl cellulose ethers wamba kumachepetsedwa kwambiri, komwe kuli kofunikira kwambiri m'madera otentha ndi owuma Ndipo zomangamanga zowonda kwambiri kumbali ya dzuwa m'chilimwe zidzakhudza kwambiri. Komabe, kupanga chifukwa cha kusowa kwa madzi osungiramo madzi kudzera mu mlingo waukulu kumayambitsa kukhuthala kwakukulu kwa zinthuzo chifukwa cha mlingo waukulu, zomwe zingayambitse kusokoneza kumanga.

Kusungirako madzi ndikofunikira kwambiri kuti muwonjezere kuuma kwa machitidwe a mineral gelling. Pansi pa zochita za cellulose ether, madziwo amamasulidwa pang'onopang'ono kumalo osanjikiza kapena mpweya kwa nthawi yaitali, motero kuonetsetsa kuti zinthu za simenti (simenti kapena gypsum) zimakhala ndi nthawi yokwanira yolumikizana ndi madzi ndikuwumitsa pang'onopang'ono.

Kodi methyl cellulose ether ndi chiyani?

Yankho: Ndi ochepa chabe a methyl cellulose ether omwe amawonjezeredwa, ndipo ntchito yeniyeni ya matope a gypsum idzawongolera kwambiri.

(1) Sinthani kusasinthasintha

Methyl cellulose ether amagwiritsidwa ntchito ngati thickener kuti asinthe kusasinthika kwadongosolo.

(2) Kusintha kufunikira kwa madzi

Mu matope a gypsum, kufunikira kwa madzi ndikofunikira kwambiri. Mfundo zofunika madzi, ndi kugwirizana matope linanena bungwe, zimadalira chiphunzitso cha matope gypsum, mwachitsanzo kuchuluka kwa miyala yamchere, perlite, etc. anawonjezera. Kuphatikizika kwa methyl cellulose ether kumatha kusintha bwino kufunikira kwa madzi ndi matope a matope a gypsum.

(3) Kusunga madzi

Kusungidwa kwa madzi kwa methyl cellulose ether, munthu amatha kusintha nthawi yotsegulira ndi njira yolumikizira matope a gypsum, kuti asinthe nthawi yogwiritsira ntchito dongosolo; awiri a methyl cellulose ether amatha kutulutsa madzi pang'onopang'ono kwa nthawi yayitali Kutha kutsimikizira bwino kugwirizana pakati pa mankhwala ndi gawo lapansi.

(4) Sinthani rheology

Kuwonjezera methyl cellulose ether akhoza bwino kusintha rheology wa pulasitala dongosolo gypsum, potero kuwongolera ntchito: matope gypsum ali workability bwino, ntchito bwino odana ndi sag, palibe adhesion ndi zida zomangamanga ndi apamwamba pulping ntchito, etc.

Kodi mungasankhire bwanji methyl cellulose ether yoyenera?

Yankho: Mankhwala a Methyl cellulose ether ali ndi makhalidwe osiyanasiyana malinga ndi njira yawo ya etherification, digiri ya etherification, kukhuthala kwa njira yamadzimadzi, zinthu zakuthupi monga fineness particle, makhalidwe a solubility ndi njira zosinthira. Kuti mugwiritse ntchito bwino, ndikofunikira kusankha mtundu woyenera wa cellulose ether m'malo osiyanasiyana ogwiritsira ntchito, ndipo mtundu wosankhidwa wa methyl cellulose ether uyenera kugwirizana ndi dongosolo lamatope lomwe limagwiritsidwa ntchito.

Ma methyl cellulose ethers amapezeka m'ma viscosity osiyanasiyana kuti akwaniritse zosowa zosiyanasiyana. Methyl cellulose ether imatha kugwira ntchito pambuyo pa kusungunuka, ndipo kusungunuka kwake kumayenera kusinthidwa kumunda wogwiritsira ntchito ndi ntchito yomanga. Ufa wabwino wa ufa ndi woyenera kuyika matope owuma (monga pulasitala wopopera). Tinthu tating'onoting'ono ta methyl cellulose ether imatha kupangitsa kusungunuka mwachangu, kotero kuti ntchito yake yabwino imatha kuchitidwa bwino pakangopita nthawi yochepa kupanga matope onyowa. Zimawonjezera kusasinthasintha ndi kusunga madzi kwa matope mu nthawi yochepa kwambiri. Izi ndizofunikira makamaka pomanga makina, chifukwa nthawi zambiri, nthawi yosakaniza madzi ndi matope owuma ndi ochepa kwambiri panthawi yomanga makina.

Kodi kusungidwa kwa madzi kwa methyl cellulose ether ndi chiyani?

Yankho: Kuchita kofunikira kwambiri kwamakalasi osiyanasiyana a methyl cellulose ether (MC) ndikusunga kwawo madzi pamakina omangira. Kuti mupeze ntchito yabwino, ndikofunikira kusunga chinyezi chokwanira mumtondo kwa nthawi yayitali. Chifukwa madzi amagwira ntchito ngati mafuta komanso zosungunulira pakati pa zinthu zakuthupi, matope osanjikizana amatha kukhala makadi ndipo matope opaka pulasitala amatha kufalikira ndi ma trowels. Makoma osasunthika kapena matailosi safunikira kunyowetsedwa kale mutagwiritsa ntchito matope a cellulose ether. Chifukwa chake MC ikhoza kubweretsa zotsatira zomanga mwachangu komanso zachuma.

Kuti akhazikike, zida za simenti monga gypsum ziyenera kuthiridwa ndi madzi. Kuchuluka kokwanira kwa MC kumatha kusunga chinyezi mumtondo kwa nthawi yayitali, kotero kuti kukhazikitsa ndi kuumitsa kupitirire. Kuchuluka kwa MC kofunikira kuti mupeze mphamvu yosungira madzi yokwanira kumadalira kuyamwa kwa maziko, kapangidwe ka matope, makulidwe a matope, kuchuluka kwa madzi amatope, komanso nthawi yoyika zinthu za simenti.

Pamene tinthu tating'onoting'ono ta MC tinthu tating'onoting'ono, matopewo amakhuthala mwachangu.