Bonding PTFE

Ukusebenzisa usimende we-epoxy noma okunamathelayo ukuze uvale i-polymer engilazini nasensimbi nakuyona uqobo.

Ukumelana kwe-polytetrafluorethylene (PTFE ) kunoma yiluphi uhlobo lokubambelela kuyinganekwane futhi kuvame ukusiza kakhulu njengoba kunjalo nokungangeni kwayo kwamakhemikhali.Kodwa lezi zimfanelo zine-drawback eyodwa ebalulekile, ukuthi i-polymer inzima kakhulu ukuyihlanganisa ngokuthembekile kwezinye izinto noma kuyo ngokwayo.Sikhona isixazululo sale nkinga esilethwe umbhali yinkampani ebizwa ngeReltek.(Okwengeziwe ngabo ngezansi).Isixazululo senkinga yi-Sodium Naphthalide encibilike ku-2-Methoxyethyl Ether noma ku-Tetrahydrofuran.Lokhu kusetshenziswa njenge-etchant ukufaka esikhundleni ama-athomu e-fluorine endaweni ngezinhlobo zamangqamuzana asebenzayo futhi abophekayo.Ngemuva kokunamathisela i-polymer surface kwamukelwa kakhulu kusimende abahlukahlukene, okuhlanganisa okunamathelayo kwe-epoxy resin njenge-Araldite, noma ama-Reltek Epoxy Resins akhethekile.I-etching iqondile futhi ihlanganisa ukuveza indawo ye-polymer egayiwe futhi ewohlokile kwisixazululo se-Sodium Naphthalide cishe imizuzu emi-2 bese ugeza indawo enamathiselwe nge-Isopropanol.Indawo enamathiselwe izinzile futhi imelana ngomshini futhi iyabopheka.Okuwukuphela kobunzima ukwakhiwa nokuphathwa kwe-Sodium Naphthalide complex.

I-Sodium Naphthalide iyi-ejenti yokunciphisa enamandla ngokwedlulele, futhi isabela ngokushesha kakhulu ne-Oxygen yasemkhathini kanye namanzi.Noma yikuphi ukuchayeka okubalulekile emkhathini kuzowuvala ngokushesha.Ngakho-ke yenziwa kangcono futhi isetshenziswe ebhokisini lamagilavu ​​ngaphansi kwe-nitrogen noma kusetshenziswa ubuchwepheshe be-Scklenk.

Ekulungiseni okuqashwe umbhali, i-2.5 gm ye-Naphthalene (GPR Rectapur) yachithwa ku-25 ml ye-Tetrahydrofuran kushubhu le-Schlenk.Kule ngxube kwanezelwa i-0.2 g yensimbi ye-sodium esanda kusikwa.Isikhala somoya kushubhu le-Schlenk sahlanzwa nge-Argon futhi savalwa ngesivalo se-Subaseal.Umpompi oseceleni wavalwa futhi ishubhu le-schlenk lacwiliswa kancane kubhavu wamanzi ogcinwe ku-45C amahora ayishumi nambili.

Isetshenziswa, i-Sodium Naphthalide iphathwa kahle ngeshubhu le-Schlenk noma ebhokisini legilavu ​​futhi ukuhlinzekwa kwe-Nitrogen noma i-Argon kunenzuzo ukuvimbela i-oxidation ye-reagent ngesikhathi sokukhwabanisa.Ilungiselelo lokunamathisela amashubhu e-polymer azacile ukuze avale ensimbi engagqwali noma kumashubhu engilazi.

Ishubhu le-polymer okufanele ligxishwe livalwa ekugcineni ukuvimbela ukulangazelela kwe-etchant, futhi lifakwa ngembobo yenaliti ye-hypodermic ebhoboza i-subbaseal.I-Subaseal iwukuvalwa okuguquguqukayo ngoba ingathwala amashubhu amaningi amadayamitha ahlukahlukene.Lokhu kusho ukuthi amashubhu abanzi impela (afinyelela ku-6mm od) angabhalwa ngale ndlela.