I-Ozone yokuguga Ukumelana ne-PTFE Ilaphu lobushushu obuphezulu

I-Jiangsu Aokai New Materials, umenzi oqeqeshiweyo kunye nomthombo wemveliso ye-PTFE yelaphu lobushushu obuphezulu, ikunika intshayelelo eneenkcukacha. Ilaphu le-polytetrafluoroethylene (PTFE) eligqunywe nge-fiberglass libonisa ukunganyangeki kweekhemikhali okugqwesileyo kwaye linikezela ngokubanzi ukuxhathisa ukuguga kwe-ozone. Nangona kunjalo, ayikhuselekanga ngokupheleleyo kwi-ozone erosion, kwaye ukusebenza kwayo ngokubanzi kuchaphazeleka kakhulu kugxininiso lwe-ozone, ubushushu be-ambient, ixesha eliqhubekayo lokuvezwa kunye nezinye izinto zangaphandle.

Ngombulelo kwisakhiwo sayo esisodwa se-molecular, i-PTFE ibonisa ukuxhathisa okunamandla kwe-ozone phantsi kweemeko eziqhelekileyo. Ibhondi ye-carbon-fluorine (CF) ene-fluorinated ngokupheleleyo iqhayisa ngamandla ebhondi aphezulu amalunga nama-485 kJ/mol. Ngeli xesha, ubume bayo bemolekyuli obujikelezayo bubumba ikhaka elishinyeneyo elikhuselayo leathom zefluorine, likhusela i-oxidants eyomeleleyo efana ne-ozone ekuhlaseleni ikhonkco eliphambili le-carbon-carbon (CC).

Nangona kunjalo, i-ozone inokutshintsha kakhulu iimpawu zomphezulu we-PTFE kwaye iqalise uthotho lweekhemikhali kunye notshintsho lomzimba. Uphononongo lubonise ukuba i-PTFE evezwe kwi-ozone ine-coefficient ye-friction malunga namaxesha amathathu aphezulu kunokuba kwindawo eqhelekileyo yomoya, ehamba namanqaku acacileyo okunxiba. Oku kubangelwa ikakhulu yi-ozone-induced surface oxidation, i-molecular bond breakage kunye nokuthamba kwezinto.

Ngokuvezwa kwexesha elide kwi-ozone, ngakumbi phantsi kweemeko zokusebenza ezinzima ezifana nobushushu obuphezulu kunye noxinzelelo oluphezulu lwe-ozone, ilaphu le-PTFE lobushushu obuphezulu liya kukhula ngokuthe ngcembe ukusuka kumonakalo omncinci ukuya kukusilela kokusebenza kwe-macroscopic, kunye nokubonakaliswa okuthile kokusilela ngolu hlobo lulandelayo:

Ukuqhawuka kwetsheyina lemolekyuli kunye nokuthotywa kwe -ozone yophuka amatsheyina emolekyuli e-CC ye-PTFE kwaye ivelise amaqhekeza amancinci emolekyuli afana ne-carbon tetrafluoride (CF₄) kunye ne-carbonyl fluoride (COF₂). Oku kukhokelela ekunciphiseni ubunzima bemolekyuli kunye nokuthotywa kokusebenza okusisiseko kwezinto.

Ukuqhekeka komphezulu kunye ne-embrittlement Yeyona nto ibonakalayo yokuguga. Izinto eziphathekayo zilahlekelwa ukuguquguquka komhlaba kwaye zivelise i-network-like cracks eqaqambileyo phantsi koxinzelelo, oko kukuthi i-ozone cracking. Ilaphu liba lukhuni kwaye libe brittle, kwaye ukuguga okugqithisileyo kuya kubangela ukubola kunye nomonakalo wesakhiwo.

Ukuhla kwiipropathi zoomatshini Ukuthotywa kwezinto ngokuqhubekayo kunciphisa amandla okuqina, ubude ngexesha lekhefu, u-elasticity kunye nezinye izikhombisi ezingundoqo zomatshini. Ukucolwa komphezulu okulandelayo, ukuxobuka kunye nokunciphisa ubukhulu kuya kunciphisa ngakumbi ukuxhathisa ukunxiba kunye nokuzinza kwesakhiwo.

Ukuwohloka kweempawu zesakhiwo somphezulu Umonakalo wesakhiwo seKhemikhali utshintsha iiparamitha eziphambili ezifana namandla angaphezulu kunye ne-angle yokumanzisa. Ukuqhekeka kweMicroscopic kunye neepores ezenziwe ngokukhukuliseka kwe-ozone ziya kwanda ngobukhulu, buthathaka kakhulu ukutywinwa kwasekuqaleni kunye nokusebenza kodwa.

Ukuxhathisa kwe-ozone ye-PTFE yobushushu obuphezulu belaphu ayigqitywanga kuphela ngesiseko sezinto ngokwayo. Ubushushu be-Ambient, imiphumo yokuguga edibeneyo kunye nezinye iimeko zangaphandle nazo zidlala indima ebalulekileyo ebomini bayo benkonzo.

Ubushushu obuphezulu bukhawulezisa kakhulu ukuthotywa kwe-ozone. Ngaphantsi kweemeko zobushushu obuphezulu, i-oxidation enamandla ye-ozone iqinisa ukuthotywa kwe-molecular chain degradation ye-PTFE. Ke ngoko, umda wexesha elide wobushushu benkonzo yeemveliso ze-PTFE wehla kabukhali ukusuka kwi-260℃ kumoya oqhelekileyo ukuya kuma-200℃–220℃ kwi-ozone kunye neemekobume zerhasi ene-oxidizing eyomeleleyo.

Kukho umphumo wokuguga we-synergistic  phakathi kwe-ozone kunye nemitha ye-ultraviolet. Kwiimeko zangaphandle, indibaniselwano yemitha ye-UV kunye ne-ozone ivelisa isiphumo esonakalisayo esandisiweyo esikhulu kakhulu kuneso sento enye.

Ukongeza, umgangatho wemveliso uyahluka ngumenzi. Umahluko kwiinkqubo zokuvelisa, ukugquma ubukhulu kunye noyilo lwefomula (njengokongezwa kwezizinzisi ezichasene ne-oxidant) kuya kukhokelela kwizikhewu ezicacileyo kwi-ozone yexesha elide yokuchasana phakathi kweemveliso ezahlukeneyo ze-PTFE zobushushu obuphezulu.

Iindlela ezisebenzayo zokuphucula ukuchasana nokuguga kwe-Ozone

1. Yongeza i-antioxidants ephezulu kunye nezizinzisi zokukhanya kwifomula ye-PTFE ukubamba iiradicals zasimahla kunye nokulibazisa ukuthotywa kwe-oxidative.

2. Yamkela unyango olulungiselelwe ukuguqulwa komphezulu ukwenza umaleko wokhuselo oxineneyo kunye nokwandisa ukuxhathisa kukhukuliseko lwerhasi ene-oxidizing.

3. Lungiselela iimeko ezichanekileyo zesicelo: lawula ubushushu bokusebenza obungaphantsi kwe-200 ℃, kwaye uphephe inkonzo yexesha elide kwiindawo ezine-ozone ephezulu kunye nemitha ye-ultraviolet.

Isishwankathelo

Ilaphu le-PTFE lobushushu obuphezulu lisebenza ngokuzinzileyo kwaye ngokugqwesileyo kubushushu begumbi kunye noxinzelelo lwe-ozone ephantsi. Nangona kunjalo, ukuthotywa kwe-oxidative, ukuqhekeka komphezulu, ukunyanzeliswa kunye nokwehla okubanzi kokusebenza kuya kwenzeka kwindawo yobushushu obuphezulu, i-ozone ephezulu okanye i-UV-idityaniswe neendawo ezirhabaxa. Ukulawulwa kwendalo okunengqiqo kunye nokuguqulwa kwezinto eziphathekayo kunokunciphisa ngokufanelekileyo ukuguga kunye nokwandisa kakhulu ubomi benkonzo yexesha elide lemveliso.

Lo mxholo wobugcisa ungentla unikwe nguJiangsu Aokai New Materials Technology Co., Ltd.

Ukuba ufuna ezinye iiparitha zobugcisa, izisombululo zesicelo kunye neenkonzo ezilungelelanisiweyo kwiimveliso zethu ezipheleleyo, kubandakanya i-PTFE yobushushu obuphezulu belaphu, i-PTFE iteyiphu yokuncamathela ephezulu yobushushu, i-PTFE i-mesh belt yokuhambisa, ibhanti lomatshini wokubopha elingenamthungo, ilaphu elinecala elinye eligqunywe nge-fluorine, ubushushu obuphezulu obuphezulu obunganyangekiyo, nceda uzive ukhululekile kwi-glass conveyor.

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