I-HPMC (i-Hydroxypropyl Methyl Cellulose) yinto eqhelekileyo ye-organic polymer additive esetyenziswa ngokubanzi ekulungiseleleni iimbumba ze-ceramic. Iimbrane zeCeramic zisetyenziswa ngokubanzi kwi-filtration yamanzi, ukwahlukana kunye nokuhlanjululwa ngenxa yamandla abo omatshini, ukuxhathisa ukubola kunye nokumelana nokushisa okuphezulu. Nangona kunjalo, ukunyanzeliswa kweembrane zeceramic yenye yezinto eziphambili ezichaphazela ukusebenza kwazo. Ukuze kuphuculwe ukunyanzeliswa kweembrane ze-ceramic, ukongeza izongezo ezifanelekileyo kuye kwaba yenye yeendlela ezibalulekileyo.
1. Indima ye-HPMC ekulungiseleleni iimbumba ze-ceramic
Umgaqo wobume bepore
Ngethuba lokulungiswa kwee-membrane ze-ceramic, i-HPMC idlala indima ekulawuleni isakhiwo se-pore. Ngokudibanisa i-HPMC kwi-slurry, inokulawula ngokufanelekileyo ukubunjwa kwee-pores ngaphakathi kwe-membrane ye-ceramic. I-HPMC iya kubola ngexesha lobushushu bobushushu obuphezulu ukwenza ubume bepore obufanayo, obubalulekileyo ekuphuculeni ukugqobhoza kweenwebu zeceramic. Ukufana kokusabalalisa ubungakanani bepore kunye nokunyuka kwe-porosity kwenza i-membrane ibe nokugqithiswa okuphezulu ngelixa igcina amandla, ngaloo ndlela inyusa izinga lokungena kwamanzi.
Nciphisa ubushushu be-sintering
Ukushisa kwe-sintering ye-membrane ye-ceramic kuchaphazela ngqo i-microstructure yayo. I-HPMC inokunciphisa ubushushu be-sintering yeenwebu ze-ceramic, ukuze zenze i-membrane isakhiwo kunye nokugqithiswa okugqwesileyo kubushushu obuphantsi. Ukunciphisa ukushisa kwe-sintering akuncedi nje kuphela ukugcina amandla, kodwa kunciphisa ukukhula okugqithisileyo kweenkozo, ngaloo ndlela kugcinwe ukuzinza kunye nokungena kwesakhiwo se-pore.
Ukuphucula ubumanzi bodaka
Njengesongezo, i-HPMC inokuphucula ubumanzi be-ceramic slurry kwaye yandise ukusebenza kodaka ngexesha lokulungiselela inwebu. Ngokuphucula iimpawu ze-rheological ze-slurry, i-slurry ingasasazwa ngokulinganayo kumphezulu we-substrate ukwenza i-membrane ye-ceramic kunye nobukhulu obufanayo kunye nobuninzi obuphakathi. Oku kubumba kakuhle kunceda ekuphuculeni ukunyanzeliswa kwe-membrane yokugqibela.
2. Inkqubo ye-HPMC yokuphucula ukungeneka
Ubume bemolekyuli ye-HPMC iqulethe inani elikhulu le-hydroxyl kunye namaqela e-methoxy, okwenza kube nokunyibilika kakuhle kwamanzi kunye neepropati zokwenza ifilimu. Kulungiselelo lweembrane zeceramic, i-HPMC idlala ezi ndima zilandelayo:
Indima ye-arhente yokwenza i-pore
I-HPMC ifumana ukubola kwe-thermal ngexesha lenkqubo ye-sintering ukuvelisa igesi. Ezi gesi zenza inani elikhulu lee-pores ezintle ngaphakathi kwe-membrane, esebenza njenge-pore-forming agent. Ukuveliswa kwee-pores kunceda ukugqithiswa kolwelo oludlula kwi-membrane ye-ceramic, ngaloo ndlela kuphuculwe ukunyanzeliswa kwe-membrane. Ukongeza, ukubola kwe-HPMC kunokunqanda ukuvaleka kwe-pore kwi-membrane yomhlaba kwaye igcine i-pores ingathinteli.
Ukuphucula i-hydrophilicity ye-membrane
Amaqela e-hydroxyl kwi-HPMC enza iibhondi ze-hydrogen kunye neemolekyuli zamanzi, okwenza umphezulu we-ceramic membrane ube ne-hydrophilic. Emva kokuba i-hydrophilicity ye-membrane ye-membrane iphuculwe, i-liquid ilula ukusabalalisa kunye nokungena kwi-membrane surface, ephucula kakhulu ukuphumelela kokungena kunyango lwamanzi kunye nokucoca. Ukongeza, i-hydrophilicity inokunciphisa ngokufanelekileyo ungcoliseko kunye nokuvalwa okwenziwe lulwelo kumphezulu we-membrane, ngaloo ndlela iphucula ngakumbi ukungeneka.
Ukufana kunye nokuzinza kwesakhiwo se-membrane
Ukongezwa kwe-HPMC kunokwenza i-microstructure ye-ceramic membrane ibe yinto efanayo. Ngethuba lenkqubo ye-sintering, ubukho be-HPMC bunokuthintela ngokufanelekileyo ukudibanisa ngokugqithiseleyo kwe-ceramic powders, okwenza isakhiwo se-pore se-membrane sisasazwe ngokufanayo, ngaloo ndlela kuphuculwe ukugqithiswa kwe-membrane. Ngexesha elifanayo, i-HPMC inokuzinzisa i-slurry ngexesha lenkqubo yokulungiselela i-membrane, ithintele i-slurry ukuba i-precipitating kunye ne-stratifying ngexesha lenkqubo yokubumba, kwaye ngaloo ndlela iqinisekise ukufana kwe-membrane ye-ceramic.
3. Imizekelo yesicelo se-HPMC kunye nohlalutyo lwesiphumo
Kwezinye izicelo ezisebenzayo, ukongezwa kwe-HPMC kuphucula kakhulu ukunyanzeliswa kweembrane zeceramic. Ukuthatha unyango lwamanzi njengomzekelo, ngokongeza i-HPMC kwinkqubo yokulungiselela iimbumba ze-ceramic, izinto ezilungiselelwe i-membrane zibonisa ukuhamba kwamanzi aphezulu kunye nokusebenza okugqwesileyo kokuchasana nokungcoliseka. Kwinkqubo yokucocwa kwamanzi amdaka, ukunyanzeliswa kwe-membrane yinto ebalulekileyo ekunqumeni ukusebenza kakuhle kwonyango. I-membrane ye-ceramic kunye ne-HPMC eyongeziweyo inokufezekisa ukuhamba kwamanzi aphezulu kuxinzelelo oluphantsi, oluphucula kakhulu unyango olusebenzayo kunye nokunciphisa iindleko zokusebenza.
I-HPMC ikwasetyenziswa ngokubanzi kwithekhnoloji yokwahlula inwebu yeceramic kwiinkalo zokutya, amayeza, njl njl. Ilungiselela ukuhluzwa kunye nemiphumo yokwahlula kwenwebu ngokuphucula ukugqithiswa kwenwebu. Ngokomzekelo, kwinkqubo yokucoca ubisi, i-HPMC iphakamisa ukunyanzeliswa kwe-membrane, okwenza inkqubo yokucoca isebenze kakuhle kwaye igweme ukulahlekelwa kwezondlo.
Njengesongezo esisebenzayo, i-HPMC idlala indima ebalulekileyo ekulungiseleleni iimbumba zeceramic. Iphucula ngokufanelekileyo ukunyanzeliswa kweembrane ze-ceramic ngokulawula isakhiwo se-pore, ukunciphisa ubushushu be-sintering, kunye nokuphucula i-fluidity ye-slurry. Isiphumo se-agent ye-pore-forming ye-HPMC, ukuphuculwa kwe-hydrophilicity kunye nokuphucula ukufana kwesakhiwo se-membrane kwenza i-membrane ye-ceramic ibonise ukugqithiswa okugqwesileyo kwiintlobo ezahlukeneyo zokuhluza kunye nokwahlula izicelo. Ngophuhliso oluqhubekayo lwetekhnoloji ye-ceramic membrane, i-HPMC iya kusetyenziswa kwiinkalo ezininzi njenge-additive, ibonelela ngamathuba amaninzi okuqhubela phambili kweteknoloji ye-membrane.
Ixesha lokuposa: Sep-30-2024