Hi kwihi ku cinca ka xivumbeko loku nga ta humelela eka lapi ra fiberglass leri funengetiweke hi PTFE eka tindhawu leti nga na tikhemikhali?

Lapi ra fiberglass leri pfanganisiweke na PTFE i nchumu lowu hlanganisiweke lowu endliweke hiku chekisa lapi ra fiberglass hi polytetrafluoroethylene (PTFE) dispersion kutani ri sintering eka mahiselo yale henhla. Xivumbeko xa yona xinga avanyisiwa hi swiphemu swimbirhi: PTFE coating na fiberglass base fabric.

 

Eka tindzhawu letinga bola hi ti khemikhali, ku cinca ka xivumbeko swiya hi muxaka, nhlayo na mahiselo ya xitirhisiwa xo bola, xikan’we na loko ngopfu ngopfu xi hlasela xifunengeto kumbe substrate. A hi kambisiseni leyara leyi hi leyara hi ku ya hi langutelo ra vaendli va malapi ya fiberglass leyi funengetiweke hi PTFE:

 

I. Ku cinca eka PTFE Coating: Swi tshamisekile swinene eka Vunyingi bya Timhangu

 

PTFE yi dume tani hi 'Hosi ya Tipulasitiki' hikokwalaho ka swihlanganisi swa yona swo tiya swinene swa khaboni-fluorine na ku nga tirhi ka tikhemikhali loku tlakukeke hi ndlela yo hlawuleka. Eka tindzhawu leti tolovelekeke letinga onhaka hi ti khemikhali (kukatsa na ti aqua regia leti virisa, concentrated sulfuric acid, concentrated nitric acid, organic solvents, na swin’wana), xivumbeko xa yona xa molecular chain axi endli ku cinca ka ti khemikhali. Hambiswiritano, ehansi ka swiyimo leswi landzelaka swo tika, xivumbeko xi ta onhaka:

 

1. Tinsimbi ta Alkali leti n’okiweke / Switshuxo swa Alkaline swo tiya (xikombiso, sodium, potassium, sodium hydroxide eka mahiselo yale henhla) .

 

- Ku Cinca ka Xivumbeko: Tinsimbi ta alkali tita humesa ti athomo ta fluorine kusuka eka PTFE, leswi endlaka leswaku kuva na dehydrofluorination reaction. Mintlawa ya -CF2- eka molecular chain ya herisiwa, yi endla carbon-carbon double bonds (-C=C-) naswona endzhaku ka sweswo swi yisa eka carbonization.

- Macroscopic Manifestation: Xifunengeto xi cinca kusuka eka milky white/translucent kuya eka buraweni kumbe ntima, xi lahlekeriwa hi ku olova, xiva brittle, naswona xiva na ti powder. Leswi i ku onhaka loku tolovelekeke ka tikhemikhali.

 

2. Switirhisiwa swo tiya swa Fluorinating na Tihayidirokhaboni to karhi leti nga na Halogen (ehansi ka mahiselo na ntshikelelo wa le henhla) .

 

- Elemental fluorine (F2), chlorine trifluoride (ClF3), na switirhisiwa swofana na swona swinga tshoveka nkolo wa carbon-carbon, leswi endlaka leswaku xifunengeto xi bola.

- Ehansi ka mahiselo yale henhla na ntshikelelo, swin’wana swa Freon-type solvents swinga vanga ku pfimba lokukulu ka PTFE. Hambi leswi ku cinca ka tikhemikhali ku nga ha endlekaka, xivumbeko xa physical xi xaniseka hi ku hunguteka ka crystallinity, volume expansion, na ku lahlekeriwa hi matimba hikokwalaho ka ti molecular chains leti sindzisiwaka ku hambana.

 

3. Ti Acids ta matimba ta Oxidizing eka Mahiselo yale henhla

 

- Ku nyuperisiwa nkarhi woleha eka fuming nitric acid kumbe hot concentrated sulphuric acid swinga oxidize hi ku nonoka ehenhla ka PTFE, ku nghenisa mintlawa ya polar yofana na mintlawa ya carbonyl na hydroxyl, naku engetela eneji yale henhla. Hambiswiritano, leswi aswi tali ku voniwa eka switirhisiwa leswi tolovelekeke.

 

Mhaka ya Nkoka: Eka vunyingi lebyikulu bya swihangalasamahungu swa tikhemikhali, xifunengeto xa PTFE hi xoxe hi xivumbeko a xi 'a xi cinci.' Kambe, xiphiqo xi tala ku va eka mhaka ya leswaku a xi ngheniwi hi ku helela, xikan'we na xivumbeko xa xona xa nyama.

 

II. Ku Cinca Eka Lapi Ra Fiberglass Base: Xihlanganisi Lexi tsaneke Xa Nchumu Hinkwawo

 

Swiphemu leswikulu swa fiberglass i silicon dioxide (SiO2) na ti oxides tin’wana ta nsimbi. Loko xiphemu lexi xi rhurhumerile, xivumbeko hinkwaxo xa lapi leri nga ni mahiselo lama tlakukeke xi ta wa.

 

1. Nhlaselo Lowu Dlayaka Wa Asidi Ya Hydrofluoric (HF) .

 

- Ku Cinca ka Xivumbeko: HF yi hundza eka nhlamulo yo karhi na SiO2: SiO2 + 4HF → SiF4↑ + 2H2O. Marhambu ya fiberglass ya n’oka hi ku kongoma ivi ya nyamalala.

- Macroscopic Manifestation: Vuandlalo bya lapi byi hatlisa byi lahlekeriwa hi matimba, byi fana na nhlonge yo olova laha ku saleke ntsena xifunengeto, ri handzuka hi ku olova loko ri koka, na ku hambanisiwa lokukulu exikarhi ka xifunengeto na substrate. Lexi i ku bola ka tikhemikhali loku chavisiwaka swinene eka swilo leswi endliweke hi fibre ya nghilazi. Loko ntsena ku ri na ti pinholes eka coating kumbe matlhelo lama nga erivaleni, ku onhaka ka kona ku va kukulu swinene.

 

2. Slow Etching hi Strong Alkalis (ngopfu ngopfu ti alkali to hisa leti hlanganisiweke) .

 

- Ku Cinca ka Xivumbeko: Ti ions ta OH− ti tshoveka ti siloxane bonds (-Si-O-Si-) eka network ya nghilazi, ti endla ti silicates leti n’okaka. Vuandlalo bya fibre byi cinca kusuka eka ku rhetela kuya eka ku olova, laha ku humelelaka migodi ya etching na ku pandzeka, diameter ya fibre ya olova, naswona ekuheteleleni ya tshoveka.

- Macroscopic Manifestation: Matimba ya ya emahlweni ya hunguteka, lapi ri hundzuka brittle, naswona loko ri goveka, ti fibre leti tshovekeke ti huma hi le ka xifunengeto, leswi endlaka leswaku xifunengeto xi pandzeka xi tlhela xi rhurhumela.

 

3. Swihangalasamahungu swa Asidi (handle ka asidi ya hydrofluoric) .

 

- Ku Cinca ka Xivumbeko: Ti acid leti tolovelekeke (hydrochloric acid, sulfuric acid, na swin’wana) titsakela ku humesa swiphemu leswinga riki swa silica (kufana na aluminium, calcium oxides, na swin’wana) kusuka eka fiberglass, leswi siyaka ngopfu silica skeleton. Endlelo leri ritala kutiveka tani hi 'leaching,' ku endla xivumbeko xa microporous eka vuandlalo bya fibre.

- Macroscopic Manifestation: Lapi ri tiya naswona riva na brittle, na ku cinca ka ku hunguteka, hambi leswi xivumbeko hinkwaxo xinga hlayisiwaka. Matimba ya hunguteka hikokwalaho ka ku dzika ka ntshikelelo.

 

III. Ku cinca eka Xihlanganisi lexi Hlanganisiweke: Ku tsandzeka loku Fihliweke

 

Tindzhawu ta ti khemikhali hakanyingi ati hlaseli hi nhloko kambe ematshan’wini ya sweswo ti nghena kusuka emakumu kumbe hiku tirhisa swihoxo leswintsongo.

 

- Ku nghena na ku Delamination: Ti organic solvents kumbe ti acid solutions ti nghena hi ti pinholes, micro-cracks, kumbe matlhelo lawa ya tsemiweke eka PTFE coating, ku hlasela fiberglass. Switirhisiwa swa reaction kumbe mati lawa ya nghenaka ya hlengeletana eka interface, leswi humesaka ntshikelelo wa osmotic, leswi endlaka leswaku PTFE coating yi blister naku delaminate kusuka eka fiberglass substrate hi xikalo lexikulu.

- Stress Corrosion Cracking: Lapi ra mahiselo yale henhla riva ehansi ka tension hinkarhi waku tirhisiwa. Ku bola ka fiberglass hi ti khemikhali (ngopfu ngopfu ti alkali to tiya) switirha hiku tirhisana na ntshikelelo wa michini, leswi endlaka leswaku ku pandzeka ku hangalaka hiku hatlisa kuya hi fibre radial direction, leswi yisaka eka ku tshoveka ka lapi hi xitshuketa na brittle-fracture morphology yo basa eka ku tshoveka.

 

Eka tindzhawu letinga onhaka hi ti khemikhali, ku cinca ka xivumbeko xa lapi ra fiberglass leri funengetiweke hi PTFE kunga katsakanyiwa tani hileswi: 'King of Plastics' coating yitshama yiri kwalomu ka ku tshamiseka kufana na ntshava, kasi fiberglass base fabric—loko se yi nghene kumbe ku hlaseriwa—yi hundzuka xirhendze xa Achilles, leswi yisaka eka ku n’oka ka marhambu, interface delamination, na ku wa ka swilo hinkwaswo ku suka endzeni ku ya ehandle.

 

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Rungula leri nga laha henhla ri nyikiwile hi Jiangsu Aoke Thekinoloji ya Switirhisiwa Leswintshwa Co., Ltd.

 

Loko u lava ku dyondza swo tala hi tipharamitha leti nga na vuxokoxoko, swiyimo swa ku tirhisiwa, na tindlela to endla hi ku landza swilaveko swa hina eka nxaxamelo wa hina hinkwawo wa switirhisiwa—ku katsa na lapi ra fiberglass leri funengetiweke hi PTFE, thepi ya fiberglass leyi funengetiweke hi PTFE, mabandhi ya fiberglass mesh lama funengetiweke hi PTFE, mabandhi lama nga na swirhabyani lama bohiweke hi namarhela, lapi ra PTFE ra tlhelo rin’we, conveyor leyi nga tiyiseriki mahiselo ya le henhla mabandhi, ni lapi ra fiberglass leri nga ni mahiselo lamakulu—hi kombela u ntshunxeka ku hi tihlanganisa:

 

Nomboro ya riqingho:  

Nkulukumba Guo: 18944819998  

Nkulukumba Liu: 13705266308  

 

Minkarhi hinkwayo hi seketela filosofi ya vukorhokeri ya xiphurofexinali na leyi fambiwaka hi vutshembeki, naswona hi tinyiketerile ku ku nyika swintshuxo swa xiyimo xin’we na vukorhokeri byo nyikela nyingiso!