Utoto Wamwala Weniweni wokhala ndi Cellulose Ether

Chikoka cha kuchuluka kwa cellulose ether, kuchuluka kwa mamolekyulu ndi njira yosinthira pazomwe zimayamwa madzi ndi kuyera kwa utoto weniweni wa miyala zimakambidwa, ndipo ether ya cellulose yokhala ndi kukana koyera kwamadzi kwa utoto weniweni wa miyala imawonetsedwa, ndipo ntchito yokwanira ya utoto weniweni wa miyala imawunikidwa kuzindikira.

Mawu ofunikira:utoto weniweni wamwala;madzi whitening kukana;cellulose ether

0,Mawu Oyamba

Varnish yamwala weniweni ndi utoto wopangira utomoni wa mchenga wopangidwa ndi granite wachilengedwe, mwala wophwanyidwa ndi ufa wamwala monga aggregate, emulsion yopangira utomoni ngati zinthu zoyambira ndikuphatikizidwa ndi zowonjezera zosiyanasiyana.Zili ndi maonekedwe ndi zokongoletsera za mwala wachilengedwe.Mu ntchito yokongoletsera kunja kwa nyumba zapamwamba, imakondedwa ndi eni ake ndi omanga ambiri.Komabe, m'masiku amvula, kuyamwa kwamadzi ndi kuyera kwakhala vuto lalikulu la utoto weniweni wa miyala.Ngakhale pali chifukwa chachikulu cha emulsion, kuwonjezera kwa zinthu zambiri za hydrophilic monga cellulose ether kumawonjezera kwambiri kuyamwa kwamadzi kwa filimu yeniyeni ya utoto.Mu phunziro ili, kuchokera m'manja mwa cellulose ether, chikoka cha kuchuluka kwa cellulose ether, kulemera kwake kwa maselo ndi mtundu wosinthidwa pazochitika zowonongeka zamadzi ndi zoyera za utoto weniweni wa miyala inafufuzidwa.

1. Njira yamayamwidwe amadzi ndi kuyera kwa utoto weniweni wamwala

Pambuyo poyanika penti yeniyeni yamwala, imakhala yoyera ikakumana ndi madzi, makamaka kumayambiriro kwa kuyanika (12h).Mu nyengo yamvula, chophimbacho chidzakhala chofewa ndi choyera pambuyo posambitsidwa ndi mvula kwa nthawi yaitali.Chifukwa choyamba ndi chakuti emulsion imatenga madzi, ndipo yachiwiri imayambitsidwa ndi zinthu za hydrophilic monga cellulose ether.Ma cellulose ether ali ndi ntchito zokulitsa komanso kusunga madzi.Chifukwa cha kutsekeredwa kwa macromolecules, kutuluka kwa yankho kumakhala kosiyana ndi kwa Newtonian fluid, koma kumasonyeza khalidwe lomwe limasintha ndi kusintha kwa mphamvu yometa ubweya, ndiko kuti, ili ndi thixotropy wapamwamba.Limbikitsani ntchito yomanga ya utoto weniweni wamwala.Ma cellulose amapangidwa ndi D-glucopyranosyl (anhydroglucose), ndipo mawonekedwe ake osavuta a molekyulu ndi (C6H10O5)n.Ma cellulose ether amapangidwa ndi cellulose mowa hydroxyl gulu ndi alkyl halide kapena etherification wothandizira pansi pamikhalidwe yamchere.Hydroxyethyl cellulose ether structure, avareji yamagulu a hydroxyl osinthidwa ndi ma reagents pa anhydroglucose unit pa cellulose cellulose unyolo amatchedwa digiri ya m'malo, magulu a 2, 3, ndi 6 hydroxyl onse amalowetsedwa m'malo, ndipo kuchuluka kwakukulu kolowa m'malo ndi 3. Magulu aulere a hydroxyl pa tcheni cha cellulose ether amatha kulumikizana kuti apange ma hydrogen bond, komanso amatha kulumikizana ndi madzi kupanga ma hydrogen bond.Mayamwidwe amadzi ndi kusungidwa kwamadzi kwa cellulose ether kumakhudza mwachindunji kuyamwa kwamadzi ndi kuyera kwa utoto weniweni wamwala.Mayamwidwe amadzi ndi kasungidwe ka madzi a cellulose ether amadalira kuchuluka kwa m'malo mwa cellulose, zolowa m'malo ndi kuchuluka kwa polymerization ya cellulose ether yokha.

2. Gawo loyesera

2.1 Zida zoyesera ndi zida

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2.2 Njira yoyesera

2.3 Njira yoyesera

Onjezani madzi, defoamer, bactericide, antifreeze, film-forming aid, cellulose, pH regulator ndi emulsion kwa disperser molingana ndi chilinganizo kuti mubalalitse wogawana, kenaka yikani mchenga wachikuda ndikuyambitsa bwino, ndiyeno gwiritsani ntchito kuchuluka koyenera kwa thickener Sinthani kukhuthala. , kumwazikana mofanana, ndi kupeza penti weniweni wamwala.

Pangani bolodi ndi utoto weniweni wamwala, ndipo yesetsani kuyesa madzi oyera mutatha kuchiritsa kwa maola 12 (kumiza m'madzi kwa maola 4).

2.4 Kuyesa magwiridwe antchito

Malinga ndi JG/T 24-2000 "Synthetic Resin Emulsion Sand Wall Paint", kuyezetsa ntchito kumachitika, kuyang'ana kukana kwamadzi kuyera kwamitundu yosiyanasiyana ya hydroxyethyl cellulose efa miyala yeniyeni, ndi zizindikiro zina zaukadaulo ziyenera kukwaniritsa zofunikira.

3. Zotsatira ndi zokambirana

Malinga ndi machitidwe a hydroxyethyl cellulose ether, zotsatira za kuchuluka kwa hydroxyethyl cellulose ether, kulemera kwa maselo ndi njira yosinthira pa kukana kwamadzi oyera a utoto weniweni wa miyala kunaphunziridwa motsindika.

3.1 Zotsatira za mlingo

Ndi kuwonjezeka kwa kuchuluka kwa hydroxyethyl cellulose ether, kukana kwamadzi kuyera kwa utoto weniweni wa miyala kumawonongeka pang'onopang'ono.Kuchuluka kwa cellulose ether, kuchuluka kwa magulu aulere a hydroxyl, m'pamenenso madzi amapangira ma hydrogen zomangira nawo, mayamwidwe amadzi a filimu yopaka utoto weniweni adzawonjezeka, ndipo kukana kwamadzi kudzachepa.Madzi ochulukirapo mufilimu ya utoto, zimakhala zosavuta kuti aziyeretsa pamwamba, kotero kuti kukana kwamadzi kumapangitsa kuti kukhale koipitsitsa.

3.2 Zotsatira za kuchuluka kwa mamolekyulu

Pamene kuchuluka kwa hydroxyethyl cellulose etha ndi osiyana wachibale maselo misa ndi chimodzimodzi.Kuchulukirachulukira kwa mamolekyulu, kumapangitsa kuti madzi aziyera kwambiri a utoto weniweni wamwala, zomwe zikuwonetsa kuti kuchuluka kwa ma cell a hydroxyethyl cellulose ether kumakhudza kukana kwamadzi kuyera kwa utoto weniweni wa miyala.Izi zili choncho chifukwa chakuti ma chemical bond > hydrogen bond > van der Waals force, ndi pamene kuchuluka kwa ma molekyulu a cellulose ether, ndiko kuti, kuchuluka kwa ma polymerization, kumapangidwanso ndi kuphatikizika kwa mayunitsi a shuga, ndipo kumapangitsa kuti ma polymerization apangidwe kwambiri. kugwirizana mphamvu ya dongosolo lonse pambuyo kupanga haidrojeni zomangira ndi madzi , mphamvu mayamwidwe madzi ndi madzi posungira mphamvu, kuipitsitsa madzi whitening kukana wa penti weniweni mwala.

3.3 Mphamvu ya njira yosinthira

Zotsatira zoyesa zikuwonetsa kuti kusinthidwa kwa nonionic hydrophobic kuli bwino kuposa koyambirira, ndipo kusinthidwa kwa anionic ndikoyipa kwambiri.Non-ionic hydrophobically modified cellulose ether, polumikiza magulu a hydrophobic pa unyolo wa cellulose ether.Pa nthawi yomweyo, makulidwe a madzi gawo zimatheka kudzera hydrogen kugwirizana madzi ndi maselo unyolo entanglement.Kuchita kwa hydrophobic kwa dongosololi kumachepetsedwa, kotero kuti mawonekedwe a hydrophobic a utoto weniweni wa miyala apitirire bwino, ndipo kukana kwamadzi kuyera kumatheka.Anionically modified cellulose ether imasinthidwa ndi cellulose ndi polyhydroxysilicate, yomwe imathandizira kukhuthala kwamphamvu, anti-sag performance komanso anti-splash performance ya cellulose ether, koma ionicity yake ndi yamphamvu, komanso kuyamwa kwamadzi ndikusunga mphamvu kumatheka, Kukana kuyera kwamadzi. wa utoto weniweni wa miyala umakhala woipitsitsa.

4. Mapeto

Mayamwidwe amadzi ndi kuyera kwa utoto weniweni wamwala amakhudzidwa ndi zinthu zambiri monga kuchuluka kwa cellulose ether komanso njira yosinthira ma molekyulu amtundu.Kuyamwa madzi ndi kuyera kwa utoto weniweni wamwala.