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 i-permeability yee-membrane 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 kwi-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