Isku xidhka PTFE

Isticmaalka sibidhka epoxy ama koolada loogu xidho polymerka galaaska iyo birta iyo lafteeda.

Iska caabbinta polytetrafluorethylene (PTFE) ee nooc kasta oo ku dheggan waa halyey oo inta badan faa'iido badan leh sida kiimiko la'aanteeda.Laakiin tayadani waxay leeyihiin hal cillad oo muhiim ah, in polymer-ka ay aad u adag tahay in si kalsooni leh loogu xidho agabka kale ama laftiisa.Waxaa jira xal mushkiladan oo ay qoraaga u keentay shirkad la yiraahdo Reltek.(Wax badan oo iyaga ku saabsan hoos).Xalka dhibaatada waa Sodium Naphthalide oo lagu milmay 2-Methoxyethyl Ether ama Tetrahydrofuran.Tan waxa loo isticmaalaa sidii wax kale oo lagu beddelo atamka fluorine ee dusha sare leh nooc unugyo ah oo firfircoon oo la xidhi karo.Ka dib marka la dhajiyo dusha sare ee polymer-ka ayaa si aad ah u aqbalaya sibidhyo kala duwan, oo ay ku jiraan xabagta resin epoxy sida Araldite, ama Reltek Epoxy Resins oo aad u khaas ah.Xididadu waa mid toos ah oo waxay ku lug leedahay soo bandhigida dusha sare ee polymer-ka qallafsan oo la gooyay xal Sodium Naphthalide ilaa 2 daqiiqo ka dibna ku dhaq dusha sare ee Isopropanol.Oogada xardhan waa mid deggan oo si farsamaysan u adkaysanaysa oo xidhan.Dhibka kaliya ayaa ah samaynta iyo maaraynta isku xidhka Sodium Naphthalide.

Sodium Naphthalide waa walax aad u awood badan oo yareeya, waxayna si degdeg ah uga falcelisaa Ogsajiinta atmospheric iyo biyo.Soo-gaadhista muhiimka ah ee jawiga ayaa si dhakhso ah u joojin doonta.Sidaas awgeed sida ugu fiican ayaa loo sameeyaa oo loo adeegsadaa sanduuqa galoofyada ee hoos yimaada nitrogen ama iyadoo la isticmaalayo tignoolajiyada Scklenk.

Diyaarinta uu qoray qoraaga, 2.5 gm ee Naphthalene (GPR Rectapur) ayaa lagu milmay 25 ml oo Tetrahydrofuran ah oo ku jira tuubada Schlenk.Isku dhafkan 0.2 gm oo bir soodhiyam ah oo dhawaan la jarjaray ayaa lagu daray.Meesha hawada ee tuubada Schlenk waxaa lagu nadiifiyey Argon waxaana lagu shaabadeeyey istaag Subaseal ah.Tuubada dhinaceeda waa la xidhay oo tuubada schlenk qayb ahaan waxaa lagu dhex milmay biyaha qubeyska ee lagu hayo 45C laba iyo toban saacadood.

Isticmaalka, Sodium Naphthalide waxaa si fiican loogu maamulaa tuubada Schlenk ama sanduuqa galoofyada iyo sahayda Nitrojiinka ama Argon ayaa faa'iido u leh si looga hortago oxidation reagent inta lagu jiro wax-qabadka.Habayn lagu saxayo tuubooyinka polymer-ka dhuuban ee lagu xidho tuubooyinka birta ah ama dhalooyinka.

Tuubbada polymer-ka ee la xardhay waxa lagu xidhaa cidhifka fog si looga hortago hammiga wax-soo-saarka, waxaana la dhex geliyaa dabada irbad hypodermic ah oo ka muda dhinaca hoose.Subaseal-ku waa xidhid badan oo ay qaadi karto tubooyinka kala duwan ee dhexroorka kala duwan.Tani waxay ka dhigan tahay in tuubooyinka aad u ballaaran (ilaa 6mm od) lagu dhejin karo habkan.