HPMC (Hydroxypropyl Methyl Cellulose) yakajairika organic polymer additive inoshandiswa zvakanyanya mukugadzirira kweceramic membranes. Ceramic membranes inoshandiswa zvakanyanya mukusefa kwemvura, kupatsanura uye kucheneswa nekuda kwesimba ravo rakanaka remuchina, kusagadzikana kwekuora uye kupisa kwakanyanya. Nekudaro, iyo permeability yeceramic membranes ndechimwe chezvinhu zvakakosha zvinokanganisa kuita kwavo. Kuti uvandudze kupenya kweceramic membranes, kuwedzera zvakakodzera zvinowedzerwa kwave imwe yenzira dzakakosha.
1. Basa reHPMC mukugadzirira kwekeramic membranes
Pore structure regulation
Munguva yekugadzirira kweceramic membranes, HPMC inobata basa mukugadzirisa pore chimiro. Nekuwedzera HPMC kune slurry, inogona kunyatso kudzora kuumbwa kwepores mukati me ceramic membrane. HPMC ichaora panguva yekupisa-kupisa sintering kuti igadzire imwe yunifomu pore chimiro, icho chakakosha pakuvandudza kupenya kweceramic membranes. Kufanana kwekugovera saizi yepore uye kuwedzera kweporosity kunoita kuti membrane ive nepamusoro permeability ichichengetedza simba, nekudaro ichiwedzera chiyero chekupinda kwemvura.
Deredza kupisa kwe sintering
Iyo sintering tembiricha yeceramic membrane inokanganisa zvakananga microstructure yayo. HPMC inogona kuderedza sintering tembiricha yeceramic membranes, kuitira kuti vakwanise kugadzira membrane chimiro neakanakisa permeability pane yakaderera tembiricha. Kuderedzwa kwekushisa kwe sintering hakungobatsiri kuchengetedza simba, asiwo kunoderedza kukura kwakanyanya kwezviyo, nekudaro kuchengetedza kugadzikana uye kupera kwechimiro chepore.
Kuvandudza fluidity ye slurry
Sekuwedzera, HPMC inogona zvakare kuvandudza kuyerera kweceramic slurry uye kuwedzera kuumba kuita kwe slurry panguva yekugadzirira membrane. Nekuvandudza rheological properties ye slurry, slurry inogona kunyanya kugoverwa pamusoro pe substrate kuti iite ceramic membrane ine yunifomu yakakura uye ine mwero density. Uku kuumbwa kwakanaka kunobatsirawo kuvandudza kupera kweiyo membrane yekupedzisira.
2. Mechanism yeHPMC yekuvandudza permeability
Iyo molecular chimiro cheHPMC ine nhamba huru yehydroxyl uye methoxy mapoka, izvo zvinoita kuti ive yakanaka kunyungudika kwemvura uye firimu-kugadzira zvinhu. Mukugadzirira kweceramic membranes, HPMC inoita mabasa anotevera:
Pore-forming agent basa
HPMC inosangana nekuora kwekupisa panguva yekugadzira gasi. Aya magasi anoumba nhamba huru yezvakanaka pores mukati me membrane, ichiita sepore-forming agent. Chizvarwa chepores chinobatsira kuyerera kwemvura inopfuura nepakati peceramic membrane, nekudaro ichivandudza kupenya kwe membrane. Mukuwedzera, kuparara kweHPMC kunogonawo kudzivirira kuvhara kwepore pa membrane pamusoro uye kuchengetedza ma pores asina kuvharwa.
Kuvandudza hydrophilicity ye membrane
Mapoka ehydroxyl muHPMC anoumba mahydrogen bond nemamorekuru emvura, achiita kuti ceramic membrane iwedzere hydrophilic. Mushure meiyo hydrophilicity ye membrane yekumusoro yakakwidziridzwa, iyo mvura iri nyore kupararira uye kupinda mukati me membrane, iyo inovandudza zvakanyanya kupindira kwekupinda mukurapa kwemvura uye kusefa. Uye zvakare, hydrophilicity inogona zvakare kunyatso kudzikisa kusvibiswa uye kuvharika kwakagadzirwa neiyo mvura iri pamusoro pe membrane, nekudaro ichiwedzera kuvandudza iyo permeability.
Uniformity uye kugadzikana kwe membrane chimiro
Kuwedzerwa kweHPMC kunogona kuita kuti microstructure yekeramic membrane iwedzere kufanana. Munguva yekugadzira sintering, kuvapo kweHPMC kunogona kuvharidzira zvakanyanyisa kuunganidzwa kweceramic poda, zvichiita kuti pore chimiro che membrane chigovane zvakafanana, nekudaro ichivandudza kupera kwe membrane. Panguva imwecheteyo, HPMC inogona kudzikamisa slurry panguva yegadziriro yekugadzira membrane, kudzivirira slurry kubva pakunaya uye stratifying panguva yekuumbwa, uye nekudaro kuve nechokwadi chekufanana kweceramic membrane.
3. Mienzaniso yekushandiswa kweHPMC uye kuongorora maitiro
Mune mamwe maapplication anoshanda, kuwedzera kweHPMC kunovandudza zvakanyanya kupetwa kweceramic membranes. Kutora kurapwa kwemvura semuenzaniso, nekuwedzera HPMC mugadziriro yekugadzirira kweceramic membranes, iyo yakagadzirwa membrane zvinhu inoratidza yakakwira mvura inoyerera uye yakanakisa anti-kusvibisa kuita. Muchigadziro chekuchenesa tsvina, kupera kwe membrane chinhu chinokosha pakusarudza kushanda kwekurapa. Iyo ceramic membrane ine HPMC yakawedzerwa inogona kuwana yakakwira mvura flux pakumanikidzwa kwakaderera, iyo inovandudza zvakanyanya kurapa kwakanaka uye inoderedza mutengo wekushandisa.
HPMC inoshandiswawo zvakanyanya mu ceramic membrane kupatsanura tekinoroji muminda yezvokudya, mishonga, etc. Inogadzirisa kusefa uye kupatsanurwa kwemhedzisiro ye membrane nekuvandudza kupenya kwe membrane. Semuenzaniso, mukusefa kwemukaka, HPMC inosimudzira kupera kwe membrane, ichiita kuti kusefa kuwedzere uye kudzivirira kurasikirwa kwezvinovaka muviri.
Sekuwedzera kwakawanda, HPMC inoita basa rakakosha mukugadzirira kweceramic membranes. Iyo inonyatso kunatsiridza kupera kweceramic membranes nekugadzirisa iyo pore chimiro, kuderedza sintering tembiricha, uye kugadzirisa fluidity ye slurry. Iyo pore-forming agent mhedzisiro yeHPMC, kukwidziridzwa kwehydrophilicity uye kuvandudzwa kwekufanana kweiyo membrane chimiro inoita kuti ceramic membrane iratidze kupenya kwakanyanya mukusefa kwakasiyana uye kupatsanura maapplication. Nekuenderera mberi kwekusimudzira kweceramic membrane tekinoroji, HPMC ichashandiswa mune mamwe minda sekuwedzera, ichipa mimwe mikana yekufambisira mberi kwe membrane tekinoroji.
Nguva yekutumira: Sep-30-2024