Muindasitiri yemazuva ano yekupeta, kuti kuvandudza hunhu hwe rheological, kugadzikana kwekuchengetedza uye mashandiro ekuvaka kwepeta, zvinowanzo dikanwa kuwedzera zvimwe zvinowedzera zvinoshanda zve polymer. Pakati pazvo,hydroxyethyl cellulose (HEC)uyehydroxypropyl methylcellulose (HPMC)zvinhu zviviri zvinoshandiswa zvakanyanya mukugadzira ether ye cellulose uye zvinosimbisa. Kunyangwe zvese zviri ma ether e-non-ionic cellulose, pane musiyano uri pachena muchimiro chemakemikari, hunhu hwekushanda uye mhedzisiro yekushandiswa mumachira.
1. Maumbirwo emakemikari uye kunyungudika
HEC ipolymer isinganyungudike mumvura inogadzirwa kubva mu cellulose yechisikigo nekuunza mapoka ehydroxyethyl kuburikidza ne etherification reaction. Maumbirwo ayo emamorekuru akapfuma mu hydrophilic hydroxyl ne hydroxyethyl groups, izvo zvinoita kuti ive nekunyungudika kwakanaka kwemvura. HEC inogona kunyungudika nekukurumidza mumvura inotonhora kuti igadzire mhinduro yakajeka ine viscous.
HPMC ipolymer inoumbwa nekuunza hydroxypropyl uye methyl substituents pamamorekuru ecellulose. Nekuda kwekuvapo kweboka rayo re hydrophobic methyl, ine mashandiro ari nani pamusoro uye hunhu hwekugadzira firimu kupfuura HEC. HPMC inokura zvishoma nezvishoma mumvura inotonhora, inotora nguva yakati kuti kuti inyunguduke zvachose, uye inokanganiswa zvikuru nekupisa.
2. Kuenzanisa kwehunhu hwe rheological
HEC ine maitiro e rheological akatsetseka, ichiratidza pseudoplasticity, kureva, maitiro ekuchekerera, uye yakakodzera masisitimu ekuputira anoda kuenzana zvakanaka. Kupenya kweHEC solution kunoderera kana yave kuchekwa zvakanyanya, izvo zvinobatsira pakukwesha, kuputira roller uye kuenzana panguva yekuvaka.
Mhinduro yeHPMC inoratidza maitiro akasimba epseudoplastic, nekusimba kwakanyanya kana yachekwa zvishoma, izvo zvinobatsira kudzivirira kudonha kwevhu uye kudzika; kusimba kunoderera zvakanyanya kana yachekwa zvakanyanya, izvo zvinobatsira pakuvandudza kuvaka. Nokudaro, HPMC inoshanda zvirinani mukushandiswa kwependi yepamberi inoda hunhu hwakasimba hwekudzivirira kudzika.
3. Kuchengetwa kwemvura uye mashandiro ekuvaka
HPMC ine mvura inochengetwa zviri nani kupfuura HEC, kunyanya munzvimbo dzakaoma kana mamiriro ekunze anopisa zvakanyanya, HPMC inogona kunonoka kubuda kwemvura uye kudzivirira kutsemuka kana kuderera kwefirimu rekuputira. Izvi zvinoita kuti HPMC ishandiswewo zvakanyanya mukupenda kwakavakirwa paputty, gypsum uye simende, kunyanya yakakodzera kupenda muzhizha kana mamiriro ekunze akaoma.
Kunyangwe HEC iinewo basa rekuchengetedza mvura, mhedzisiro yacho yakaderera zvishoma pane HPMC, kunyanya munzvimbo dzinopisa zvakanyanya uye mhepo inomhanya zvakanyanya. Kusakwana kwayo kwekuchengetedza mvura kunogona kukonzera kuoma kwakanyanya mushure mekuvakwa, zvichikanganisa huwandu uye kutsetseka kwependi.
4. Kuramba ma enzyme uye kuora kwemuviri
HEC ine huwandu hwakawanda hwe hydroxyethyl muchimiro chayo uye iri nyore kusvibiswa nehutachiona. Nokudaro, kusasimba kwayo muma enzyme hakuna kunaka, kunyanya kana ikachengetwa kwenguva yakareba, inogona kukonzera kuora, uye zvinochengetedza zvinoda kuwedzerwa kuti nguva yekuichengeta iwedzere.
HPMC inodzivirira ma enzyme zviri nani pane HEC uye yakagadzikana. Inonyanya kukodzera machira emuindasitiri ane zvinodiwa zvakanyanya zvekuchengetedza.
5. Mutengo uye mashandisirwo emusika
Kana tichitarisa mutengo, HEC inodhura zvishoma uye yakakodzera zvigadzirwa zvekushongedza zvekuvaka zvakakura uye zvakachipa. Kusimba kwayo kwakanaka uye kuchinjika kwayo kunoita kuti ive nemusika wakanyanya mukushandiswa kwakadai sekushongedza madziro emukati uye pendi dzelatex dzemhando yepamusoro.
Kunyangwe HPMC ichidhura zvishoma, kushanda kwayo kwakazara kunoita kuti ishandiswe zvakanyanya muma coating systems ari pakati nepakati kusvika pakakwirira, kunyanya panguva dzine zvinodiwa zvakanyanya pakuvaka, kudzivirira kudzika uye kuchengetedza mvura, zvakaita se coating yekunze kwemadziro, coating inonamira, uye coating inodzivirira mamiriro ekunze.
6. Zvakatipoteredza uye kuchengetedzeka
Ose ari maviri ma non-ionic cellulose ethers, ane hukama hwakanaka nezvakatipoteredza uye anogona kuora, haana organic compounds (VOCs), uye anoenderana nekukura kwemavara egirini uye ane hushamwari nezvakatipoteredza. Zvisinei, panguva yekushandiswa, kunofanira kutariswa kuti ane guruva uye hygroscopicity, uye dziviriro inodiwa pakushanda kwayo inofanira kutorwa.
HECuyeHPMCchimwe nechimwe chine zvakanakira zvacho pakushandisa pendi. HEC inonyanya kukodzera zvigadzirwa zvependi zvinotarisa pakugadzirisa mitengo uye zvine zvinodiwa zvakanyanya kuti kuvaka kushande zvakanaka; nepo HPMC ichishandiswa zvakanyanya mupendi dzepakati kusvika dzepamusoro dzine zvinodiwa zvepamusoro nekuda kwekuchengetedza kwayo mvura, kudzivirira kudzika uye kushanda zvakanaka kwekuvaka. Mukushandisa chaiko, HEC kana HPMC dzinofanira kusarudzwa zvine musoro zvichienderana nezvinhu zvakaita sezvinodiwa pakushanda kwefomula yependi, nzira dzekuvaka nemamiriro ekunze, uye dzinogona kushandiswa pamwe chete sezvinodiwa kuti pave nekushanda kwakazara.
Nguva yekutumira: Chivabvu-27-2025