Ma cellulose ethers ndi mtundu wa polima wosungunuka m'madzi wopangidwa pambuyo posintha mankhwala a cellulose. Amagwiritsidwa ntchito kwambiri muzomangamanga, makamaka akagwiritsidwa ntchito mumatope okhala ndi zotsatira zazikulu.
Zinthu zoyambira za cellulose ethers
Ma cellulose ethers ndi mtundu wa polima wopezedwa ndi mankhwala achilengedwe a cellulose. Ma cellulose ethers ambiri amaphatikizapo hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), carboxymethylcellulose (CMC) etc. Iwo ali ndi solubility wabwino ndi thickening luso, ndipo akhoza kupanga yunifolomu ndi khola njira colloidal m'madzi. Izi zimapanga ma cellulose ethers kugwiritsidwa ntchito kwambiri muzomangira.
Zinthu zazikulu za cellulose ethers ndi izi:
Thickening: akhoza kwambiri kuonjezera mamasukidwe akayendedwe a madzi kachitidwe.
Kusunga madzi: Ili ndi mphamvu yosunga madzi mwamphamvu kwambiri ndipo imatha kuteteza madzi kuti asatayike panthawi yomanga.
Kupanga filimu: Ikhoza kupanga filimu yofanana pamwamba pa chinthu kuti chiteteze ndi kuchikulitsa.
Lubricity: Imapititsa patsogolo ntchito yomanga matope, kupangitsa kuti ikhale yosavuta kugwiritsa ntchito komanso mawonekedwe.
Udindo waukulu wa cellulose ether mumatope
Udindo wa cellulose ether mu matope umawonekera makamaka muzinthu izi:
1. Konzani kasungidwe ka madzi
Mtondo umakonda kutha mphamvu komanso zovuta zosweka chifukwa cha kutaya madzi pakumanga. Cellulose ether imakhala ndi madzi osungira bwino ndipo imatha kupanga maukonde mumatope kuti itseke chinyezi ndikuchepetsa kutuluka kwa madzi ndi kutayika, potero kumapangitsa kuti madzi asungidwe mumatope. Izi sizimangowonjezera nthawi yotsegulira matope, komanso zimatsimikizira kuti matope amakhala ndi madzi okwanira panthawi ya kuuma, kukulitsa mphamvu zake ndi kukhalitsa.
2. Kupititsa patsogolo ntchito yomanga
Kupaka mafuta kwa cellulose ether kumapangitsa kuti matope azikhala osalala panthawi yomanga, kukhala osavuta kugwiritsa ntchito ndi kufalikira, komanso kumathandizira pakumanga. Pa nthawi yomweyo, thickening katundu wa mapadi efa kumapangitsa matope kukhala wabwino thixotropy, ndiko kuti, amakhala woonda pamene pansi kukameta ubweya mphamvu ndi kubwerera ake oyambirira mamasukidwe akayendedwe pambuyo kukameta ubweya mphamvu kutha. Khalidweli limapangitsa kuti matope asagwedezeke pomanga komanso kukhala ndi mawonekedwe abwino.
3. Wonjezerani kumamatira kwa matope
Selulosi ether akhoza kupanga yunifolomu maukonde dongosolo mu matope, kuonjezera zomatira mphamvu ya matope, ndi bwino adhesive ake ku gawo lapansi. Izi zingalepheretse matope kuti asasiyanitsidwe ndi zinthu zoyambira panthawi yowumitsa ndikuchepetsa kuchitika kwa mavuto abwino monga kugwetsa ndi kugwa.
4. Sinthani kukana kwa ng'anjo
Mafilimu opanga mafilimu a cellulose ether amalola matope kuti apange filimu yopyapyala pamwamba pa nthawi yowumitsa, yomwe imagwira ntchito yoteteza komanso imachepetsa kukhudzidwa kwa chilengedwe chakunja pamatope. Panthawi imodzimodziyo, kusunga madzi ndi kukhuthala kungathenso kuchepetsa ming'alu ya shrinkage chifukwa cha kutaya madzi mumatope ndikupangitsa kuti zisawonongeke.
Zotsatira zenizeni za ma cellulose ethers pazinthu zamatope
Kukhudza kwapadera kwa cellulose ether pakugwira ntchito kwa matope kungawunikidwe mwatsatanetsatane kuchokera kuzinthu izi:
1. Kugwira ntchito
Tondo wowonjezeredwa ndi cellulose ether imagwira bwino ntchito pogwira ntchito. Kusungidwa bwino kwa madzi ndi kuyanika kwake kumapangitsa kuti matopewo azikhala osalala panthawi yomanga, osavuta kugwira ntchito, komanso kuti asavutike kupanga. Pa nthawi yomweyo, thickening zotsatira za mapadi efa akhoza kusintha thixotropy wa matope, kuti matope akhalebe mawonekedwe ake bwino pomanga ndipo n'zosavuta sag ndi sag.
2. Mphamvu
Kusungidwa kwamadzi kwa cellulose ether kumathandizira kuti matope azikhala ndi chinyezi chokwanira panthawi yowumitsa, kumalimbikitsa kuyamwa kwa simenti, ndikupanga mawonekedwe olimba a hydration mankhwala, motero kumapangitsa mphamvu ya matope. Komanso, kugawa yunifolomu ndi kugwirizana zotsatira za mapadi ether kungathandizenso dongosolo lamkati la matope okhazikika, kuchepetsa kuchitika kwa ming'alu yaying'ono, ndikuwongolera mphamvu zonse.
3. Kukhalitsa
Chifukwa ma cellulose ether amatha kusunga chinyezi mumatope, matope amatha kupanga mawonekedwe ofananirako panthawi yowumitsa, kuchepetsa kuchitika kwa ming'alu ya shrinkage, potero kumapangitsa kuti matopewo azikhala olimba. Filimu yopangidwa ndi cellulose ether imathanso kuteteza matope pamtunda wina wake, kuchepetsa kukokoloka kwa matope ndi chilengedwe chakunja, ndikuwonjezera kukhazikika kwake.
4. Kusunga madzi ndi kukana ming'alu
Ma cellulose ether amatha kusintha kwambiri kusungidwa kwa madzi kwa matope, kulola kuti matope azikhala ndi chinyezi chokwanira panthawi yowumitsa ndikuchepetsa kuchitika kwa ming'alu ya shrinkage. Kuonjezera apo, filimu yopanga filimu ya cellulose ether imalola matope kuti apange filimu yotetezera pamwamba, kuchepetsa kukhudzidwa kwa chilengedwe chakunja pamatope ndikuwongolera kukana kwake ming'alu.
Kugwiritsa ntchito cellulose ether mumatope kumakhala ndi zotsatirapo. Kusungirako bwino kwa madzi, kukhuthala, kupanga mafilimu ndi zokometsera zathandizira kwambiri ntchito yomanga, mphamvu, kulimba ndi zina zamatope. Choncho, ether ya cellulose, monga chowonjezera chofunikira, yakhala ikugwiritsidwa ntchito kwambiri muzomangamanga zamakono ndipo yakhala njira yofunika kwambiri yopititsira patsogolo ntchito ya matope.
Nthawi yotumiza: Jul-12-2024