Ma cellulose ethers ndi gulu lofunikira la mankhwala a polima omwe amagwiritsidwa ntchito kwambiri pomanga, zokutira, mankhwala ndi zina. Kapangidwe kake kapadera kamankhwala ndi mawonekedwe ake amamupatsa mwayi wofunikira pakuwongolera zomatira komanso kupanga mafilimu.
1. Zinthu zofunikira za cellulose ethers
Cellulose ether ndi mtundu wa polima wosungunuka m'madzi womwe umapezeka mwa kusintha kwamankhwala a cellulose achilengedwe. Mapangidwe ake oyambira ndi unyolo wa macromolecular wopangidwa ndi mayunitsi a β-D-glucose olumikizidwa ndi β-1,4-glycosidic bond. Ma cell a cellulose ethers amaphatikizapo hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), carboxymethylcellulose (CMC), etc. Ma cellulose ethers ali ndi kukhuthala kwabwino, kusunga madzi, kukhazikika, kupanga mafilimu ndi zinthu zina, zomwe zimawapangitsa kuti azigwira ntchito yofunikira pa ntchito zosiyanasiyana. .
2. Njira yolimbikitsira kumamatira
Wonjezerani kumamatira kwapakati: Ma cellulose ether amatha kupanga njira yokhazikika ya colloidal mu yankho. Njira ya colloidal iyi imatha kugawidwa mofanana pamwamba pa gawo lapansi, kudzaza ma micropores apamwamba, ndikuwongolera kumamatira kwapakati. Mwachitsanzo, kuwonjezera HPMC ku zipangizo zomangira kungapangitse kumamatira pakati pa matope ndi zinthu zoyambira, kupangitsa matope kumamatira kwambiri pakhoma.
Kupititsa patsogolo wettability wa gawo lapansi: Ma cellulose ether ali ndi hydrophilicity yabwino ndipo amatha kusintha kunyowetsa kwa yankho pa gawo lapansi, potero kumawonjezera kumamatira. Kunyowa ndi chimodzi mwazinthu zazikulu zomwe zimakhudza kumamatira. Pakuwongolera kunyowa, ma cellulose ether amatha kulimbikitsa zinthu zokutira kuti zinyowe bwino ndikuphimba gawo lapansi.
Kupititsa patsogolo makina oyika: Filimu yopangidwa ndi cellulose ether panthawi yowumitsa imakhala ndi kusinthasintha komanso mphamvu, zomwe zimathandiza kuti mapadi a cellulose apange makina osakanikirana pamwamba pa gawo lapansi kuti apititse patsogolo kumamatira. Izi makina interlocking tingati n'kofunika makamaka zokutira ndi zomatira, amene angathe bwino patsogolo adhesion katundu wa zipangizo.
3. Njira zowongolera mawonekedwe opangira mafilimu
Mafilimu abwino kwambiri opanga mafilimu: Ma cellulose ether amatha kupanga yunifolomu ya high-viscosity solution atatha kusungunuka m'madzi, ndipo akhoza kupanga filimu yowonekera mosalekeza pambuyo poyanika. Kanemayu ali ndi mphamvu zamakina komanso kusinthasintha, amatha kuphimba bwino gawo lapansi ndikuwongolera kupanga filimu. Mu zokutira ndi zokutira mankhwala, mafilimu opanga mafilimu a cellulose ethers ndi ofunika kwambiri.
Kusungirako madzi abwino: Cellulose ether imakhala ndi kusungirako madzi kwakukulu, yomwe imatha kusunga chinyezi choyenera panthawi yopanga mafilimu ndikuletsa kuwonongeka kwa mapangidwe a filimu chifukwa cha kuyanika kwambiri. Kusungirako madzi kumathandiza kupanga filimu yofanana ndi wandiweyani, kuteteza kusweka ndi kupukuta filimuyo. Pomanga matope ndi zokutira, madzi osungira madzi a cellulose ethers amatha kupititsa patsogolo ntchito yomanga ya zipangizo ndi khalidwe lomaliza la kupanga mafilimu.
Yang'anirani liwiro la kuyanika: Ma cellulose ether amatha kusintha kuchuluka kwa madzi amadzimadzi panthawi yopanga filimu, ndikupangitsa kuti filimuyo ikhale yokhazikika. Mwa kuwongolera kuthamanga kwa kuyanika, cellulose ether imatha kuletsa kupsinjika kwapang'onopang'ono komwe kumachitika chifukwa cha kuyanika mwachangu kwa filimuyo, potero kumapangitsa kuti filimuyo ikhale yabwino komanso yokhazikika. M'makampani opanga mankhwala, ma cellulose ethers amagwiritsidwa ntchito popaka mankhwala osokoneza bongo, omwe amatha kuyendetsa bwino kuthamanga kwa kuyanika kwa nsanjika yophimba ndikuonetsetsa kuti nsongazo zimakhala zofanana komanso zosagwirizana.
4. Zitsanzo zogwiritsira ntchito
Mtondo womanga: Kuwonjezera HPMC ku matope omanga kumatha kupititsa patsogolo kumatira ndi ntchito yomanga matope. Kupyolera mu kukhuthala kwake ndi kusungira madzi, HPMC imapangitsa kuti mawonekedwe agwirizane pakati pa matope ndi zinthu zoyambira, ndipo amathandizira kupanga mafilimu amatope, kupangitsa kuti matope azikhala osalala panthawi yomanga komanso amphamvu pambuyo popanga filimu.
Utoto: Kuthira utoto wa cellulose ether ku utoto wopangidwa ndi madzi kumatha kuwongolera mawonekedwe ndi kupanga mafilimu a utoto, kupangitsa kuti utotowo ukhale wosalala komanso wosalala. Kupyolera mu mawonekedwe ake abwino kwambiri opangira mafilimu ndi kusungirako madzi, cellulose ether imatsimikizira kuti zokutira zimapanga filimu yowonongeka ndi yofanana panthawi yowumitsa, kupititsa patsogolo kumamatira ndi kulimba kwa zokutira.
Kupaka kwamankhwala: Pakuyika kwamankhwala, ma cellulose ethers monga HPMC amagwiritsidwa ntchito nthawi zambiri kupanga nsanjika. Mafilimu abwino opangira filimu ya cellulose ether komanso kuthekera kowongolera kuthamanga kwa kuyanika kumatha kutsimikizira kufanana ndi kukhulupirika kwa wosanjikiza wokutira ndikuwongolera kukhazikika ndi kutulutsa mawonekedwe a mankhwalawa.
Ma cellulose ether ali ndi zotsatirapo zazikulu pakuwongolera kumamatira ndi kupanga mafilimu kudzera mu kukhuthala kwake, kusunga madzi, komanso kupanga filimu. Kugwiritsidwa ntchito kwake kwakukulu pakumanga, zokutira, zamankhwala ndi magawo ena kumatsimikizira mokwanira ntchito yake yofunikira pakukulitsa zomatira ndi kupanga mafilimu. M'tsogolomu, ndi kupititsa patsogolo luso la kupanga ma cellulose ether komanso kupanga zinthu zatsopano za cellulose ether, ether ya cellulose iwonetsa chiyembekezo chochulukirapo m'magawo ambiri.
Nthawi yotumiza: Jul-13-2024