I-PTFE idume ngokungenzi imichiza yayo – edla ngokubizwa ngokuba yi-'King of Plastics.' Ixhathisa phantse zonke iiasidi, iialkali, kunye nezinyibilikisi kubushushu begumbi. Nangona kunjalo, 'phantse yonke' ayisiyiyo 'konke.' Phantsi kweemeko ezigqithisileyo - ubushushu obuphezulu, ukugxila okuphezulu, okanye kwimo enyibilikayo - iikhemikhali ezithile zinokuhlasela i-PTFE. Kwaye nangona i-PTFE ngokwayo isinda, i-fiberglass substrate engaphantsi inokuba sesichengeni ukuba i-coating ineziphene.
Ukuqonda le mida kubalulekile ekukhetheni ilaphu le-PTFE kwiindawo ezirhabaxa zekhemikhali.
I-Aokai PTFE ivavanye amalaphu agqunywe nge-PTFE ngokuchasene neekhemikhali ezinobundlobongela. Esi sikhokelo sichaza oko corrodes PTFE ngokuthe ngqo, yintoni ehlasela i-fiberglass substrate, kunye nendlela yokuphepha ukusilela.
Kwenzeka Njani ukuMhlwa - Iindlela ezimbini
Ilaphu le-PTFE elinobushushu obuphezulu linamalungu amabini: i- PTFE yokwambathisa (ebhityileyo, engakhuni, inert enekhemikhali) kunye ne -fiberglass substrate (inika amandla kodwa isengozini kwiikhemikhali ezithile). Ukonakala kwenzeka ngeendlela ezimbini:
1. Ukhukuliseko oluthe ngqo lwengubo ye-PTFE
Oku kwenzeka kuphela phantsi kweemeko ezinzulu - ukushisa okuphezulu, ukugxininiswa okuphezulu, okanye kwimeko etyhidiweyo. Kwiqondo lobushushu begumbi, i-PTFE ayinakukhuseleka ngokuthe ngqo kuhlaselo lwekhemikhali.
2. Ukonakala kwe-fiberglass substrate ngokusebenzisa iziphene zokugquma
Iikhemikhali zingena kwimingxuma, imikrwelo, okanye i-micro-cracks kwi-PTFE coating kwaye ihlasele iifiber zeglasi. I-PTFE ngokwayo isenokubonakala ilungile, kodwa ilaphu liphelelwa ngamandla omatshini kwaye lingakrazuka lula. Le yimowudi yokungaphumeleli eqhelekileyo xa isambatho sonakalisiwe.
Imichiza ehlasela ngokuthe ngqo i-PTFE Coating
Ezi zinto zisabela nge-PTFE ngokwayo, kodwa phantsi kweemeko ezigqithisileyo.
I-sodium enyibilikisiweyo (Na), i-potassium (K), kunye ne-lithium (Li) ihlubula i-athomu ye-fluorine esuka kwi-PTFE, ebangela i-carbonization, i-black discoloration, kunye ne-powdering of the surface material. Isisombululo sesodium-naphthalene esetyenziselwa i-PTFE etching isebenza kulo mgaqo.
Isiphumo: Ukutshatyalaliswa ngokupheleleyo kwesakhiwo se-PTFE.
Iimeko: Nakuphi na ukuba sesichengeni kwisinyithi esinyibilikisiweyo sealkali (ngaphezulu kweendawo zazo zokunyibilika, umzekelo, iNa kuma-98°C).
Icebiso: Kuphephe ngokupheleleyo. Sebenzisa ifilimu esulungekileyo ye-PTFE kuphela ukuba kuyimfuneko, kwaye nangona kunjalo ngononophelo.
2. Ii-agent ezinamandla ze-fluorinating kumaqondo aphezulu
Ezi zinto zinokubola ngakumbi i-PTFE phantsi kobushushu obuphezulu:
Irhasi yeFluorine (F₂): Ibangela ukuthotywa kancinci kancinci kubushushu obuphezulu kunye noxinzelelo.
I-Interhalogen fluorides: Iikhemikhali ezisebenza kakhulu njenge-chlorine trifluoride (ClF₃) kunye ne-bromine pentafluoride (BrF₅) zisenokubangela ukusabela okunzulu okanye nokutsha kwe-PTFE kumaqondo obushushu aphezulu.
I-oxidizing fluoride eyomeleleyo: Umzekelo, i-xenon difluoride (XeF₂).
Ingcebiso: Gcina ilaphu le-PTFE likude kule michiza, ngakumbi kumaqondo obushushu aphezulu.
3. Iialkali ezinyibilikisiweyo ezinamandla kumaqondo obushushu aphezulu
I-sodium hydroxide enyibilikisiweyo (NaOH) kunye ne-potassium hydroxide (KOH) ziyonakalisa ngokucothayo umphezulu we-PTFE ngaphezulu kwe-300 ° C, ekhokelela ekulahlekeni kwe-hydrophobicity kunye neglosi yomphezulu. Ngaphantsi kwe-300 ° C, i-PTFE ixhathisa ialkali kakuhle. Kwiqondo lokushisa kwegumbi, akukho mphumo.
I-Magnesium powder (Mg), i-aluminium powder (Al), kunye nezinto ezifanayo zisabela ngobundlobongela kunye ne-PTFE kumaqondo aphezulu okushisa, ukuvelisa i-fluoride yensimbi kunye nekhabhoni. Esi sisiseko se-pyrotechnic kunye neengoma ze-incondiary eziqulethe i-PTFE.
Iikhemikhali ezihlasela i-Fiberglass Substrate ngokusebenzisa iziphene zokugquma
Ezi khemikhali azisebenzi nge-PTFE, kodwa ukuba i-PTFE yokwambathisa inawo nawuphi na umngxuma, umkrwelo, okanye umphetho wokuvezwa, ziya kungena kwaye zitshabalalise i-fiberglass.
1. I-Hydrofluoric acid (HF) - eyona yingozi kakhulu
I-Hydrofluoric acid iyonakalisa kakhulu i-fiberglass. Isabela ngokukhawuleza ngesilicon dioxide (eyona nxalenye iphambili yeglasi) ukwenza i-silicon tetrafluoride gas, inyibilikisa imicu yeglasi.
I-PTFE ngokwayo imelana ne-HF ngokugqibeleleyo – i-PTFE isoloko isetyenziselwa izixhobo zokuphatha i-HF.
Nangona kunjalo, ilaphu eligqunywe nge-PTFE AYIKHUSELEKANGA kwi-HF ngaphandle kokuba i-pinhole ayinamngxuma ngokupheleleyo (okunzima kakhulu ukuyiqinisekisa). Nasiphi na isiphene siya kuvumela i-HF ukuba ingene kwi-fiberglass, ibangele ukusilela kwelaphu ngokukhawuleza.
Isincomo: Kwinkonzo ye-HF, sebenzisa ifilimu ye-PTFE esulungekileyo (akukho fibreglass yokuqinisa) okanye ilineni ye-PTFE egqunywe ngokupheleleyo enemibhobho enguziro eqinisekisiweyo.
2. I-alkali egxininiswe kumaqondo aphezulu obushushu
Isisombululo se-sodium hydroxide (i-NaOH) egxininiswe kakhulu kwiqondo lokushisa eliphezulu sinokutshabalalisa i-fiberglass ngokusebenzisa ukungafezeki kokugquma. Ubushushu begumbi, i-alkali ehlanjululweyo ikhuselekile.
3. I-asidi ye-phosphoric egxininisiweyo kumaqondo aphezulu
Ukunxibelelana ixesha elide kunye ne-asidi ye-phosphoric egxininisiweyo iya kubangela ukubola kwi-fiberglass. Kwakhona, i-PTFE ngokwayo iyayichasa, kodwa iziphene zokugquma iindawo ezibuthathaka.
Izikhumbuzo ezibalulekileyo zeNkonzo yeMichiza
1. Uninzi lweentsilelo luvela kwi-mechanical wear okanye ukuguga kwe-thermal, kungekhona ukuhlaselwa kweekhemikhali
Kusetyenziso oluqhelekileyo lwemizi-mveliso (izityalo zekhemikhali, ukusetyenzwa kokutya, njl. njl.), ilaphu le-PTFE liyasilela ngenxa yokukrazuka, ukukrazuka, okanye ukuthotywa kobushushu kwakudala phambi kokuba ukudleka kweekhemikhali kube ngumba. I-inertness yekhemikhali ye-PTFE yinyani kwaye ithembekile phantse kuzo zonke iikhemikhali eziqhelekileyo ukuya kuma-260°C.
2. Ukuba kufuneka uphathe iikhemikhali ezinobundlobongela, sebenzisa ifilimu esulungekileyo ye-PTFE
Ukusetyenziswa okubandakanya isinyithi esinyibilikisiweyo sealkali, iHF eshushu egxininiswe kakhulu, okanye i-agent eyomeleleyo ye-fluorinating, i-PTFE-coated fiberglass ayikhuthazwa . Endaweni yoko, sebenzisa:
Ifilimu ye-PTFE ecocekileyo (i-skived okanye iphoswe) ngaphandle kokuqinisa i-fiberglass
zetsimbi ezifakwe kwi-PTFE Izixhobo
I-PFA okanye i-FEP (ezinye ii-fluoropolymers ezinokumelana okufanayo kodwa iipropathi ezahlukeneyo zoomatshini)
3. Hlala uvavanya phambi kokusetyenziswa ngokupheleleyo
Ukuba isicelo sakho sibandakanya iikhemikhali ezingadweliswanga njenge 'ekhuselekileyo' kwiitshathi ezihambelanayo eziqhelekileyo, yenza uvavanyo lokuhambelana nemathiriyeli phantsi kweemeko zokwenyani zokusebenza (ubushushu, ukugxila, ubude bexesha). I-Aokai PTFE inokubonelela ngeesampulu zovavanyo zokuqinisekiswa.
IsiShwankathelo-Ukuhambelana kweMichiza eKhawulezayo
Ikhemikhali |
Isiphumo kwi-PTFE Coating |
Impembelelo kwi-Fiberglass (ukuba ibonakalisiwe) |
Ukhuselekile kwi-PTFE Fabric? |
Uninzi lweeasidi (H₂SO₄, HCl, HNO₃, njl.) |
Akukho nanye |
Akukho nanye |
✅ Ewe (ukuya kuma-260°C) |
Uninzi lwealkalis (NaOH, KOH - dilute, iTemp yegumbi) |
Akukho nanye |
Akukho nanye |
✅ Ewe |
NONE |
Umhlwa ngokuthe ngcembe |
Ukuhlaselwa ngeziphene |
⚠️ Hayi (sebenzisa i-PTFE esulungekileyo) |
I-Hydrofluoric acid (HF) |
Akukho (ukuchasana okugqwesileyo) |
Ukupheliswa ngokukhawuleza |
❌ Hayi (ngaphandle kokuba ukutyatyiswa kugqibelele) |
Izinyibilikisi ze-organic (i-acetone, i-toluene, i-alcohol) |
Akukho nanye |
Akukho nanye |
✅ Ewe |
Iintsimbi zealkali ezinyibilikisiweyo (Na, K) |
Ukutshatyalaliswa ngokupheleleyo |
N / A |
❌ Hayi (sebenzisa i-PTFE esulungekileyo) |
Irhasi yeFluorine (F₂) kwiqondo lokushisa eliphezulu |
Iyabola |
N / A |
❌ Hayi |
I-asidi ye-phosphoric egxininisiweyo eshushu |
Akukho nanye |
Ikhukulisa kancinci |
⚠️ Isilumkiso (ziphephe iziphene) |
I-Aokai PTFE ibonelela ngesikhokelo sokuhambelana neekhemikhali kwaye inokucebisa imveliso elungileyo - ilaphu eligqunywe nge-PTFE kuninzi lwezicelo, okanye ifilimu esulungekileyo yePTFE yenkonzo yemichiza egqithisileyo. Qhagamshelana nathi ngemichiza yakho ethile, ubushushu, kunye nexesha lokuvezwa.
Lo mxholo ungentla unikwe ngu I-Jiangsu Aokai yeZixhobo eziNtsha zeTekhnoloji Co., Ltd.
Ukuba ufuna ukufunda ngakumbi malunga neenkcukacha ezicacileyo, iimeko zesicelo kunye nezisombululo ezilungiselelwe uluhlu lwethu olupheleleyo lwemveliso, kubandakanywa amalaphu e-PTFE anobushushu obuphezulu, iiteyiphu ze-PTFE ezinobushushu obuphezulu, iibhanti ze-mesh ze-PTFE, amabhanti omatshini wokubopha angenamthungo, ilaphu le-PTFE elinamacala elinye, amalaphu anobushushu obuphezulu obunganyangekiyo, kunye ne-fiberglass enganyangekiyo.
Sihlala sixhasa intanda-bulumko yobungcali kunye nemfezeko, kwaye sizibophelele ekukuboneleleni ngezisombululo ezipheleleyo kunye neenkonzo ezinolwazelelelo.
