Vuyelo bya PTFE Emulsion pH Value eka kutshamiseka ka yona na matirhelo ya Impregnation

Jiangsu Aokai New Materials, muendli wa malapi ya mahiselo yale henhla ya PTFE, u hlamusela hilaha nhlayo ya pH ya polytetrafluoroethylene (PTFE) emulsion yi tirhaka tani hi parameter ya nkoka leyi tiyisisaka matirhelo ya yona ya ku lulamisiwa na ku tirhisiwa. Switirhisiwa leswikulu hi ntolovelo swi hlayisa pH leyi tiyeke ya alkaline leyi tsaneke ya 8.0–10.5 . Ku cinca cinca eka pH swinga hlohletela chain reaction kusuka eka micro kuya eka macro levels, leswi khumbhaka kutshamiseka ka system (xikombiso, vutomi bya shelf, anti-coagulation capacity) xikan’we na matirhelo ya impregnation (xikombiso, permeability, final coating quality).

1. Vuyelo bya ku tshamiseka

PTFE emulsion i sisiteme leyi nga tshamisekangiki hi thermodynamically leyi ku tiya ka yona ngopfu ngopfu ku titshegeke hi electrostatic repulsion exikarhi ka ti microparticles ta PTFE. pH yi lawula hiku kongoma balance leyi ya key.

Endlelo ro Tiyisisa Electrostatic (Zeta Potential) .

Eka ndzhawu leyi nga na alkaline yo tsana, ti microparticles ta PTFE tiva na charge yo biha hiku adsorbing hydroxyl ions (OH−), na Zeta potential ya kwalomu ka -50 mV kuya eka -65 mV . Ku hlongoriwa loku ka matimba ka electrostatic swiringanerile ku hlula matimba ya van der Waals naku hlayisa ti particles ti hangalakile.Loko pH yi hunguteka kuya eka isoelectric point ya PTFE (ekusuhi na pH 2.9–3.2), ti surface charges ta neutralized, Zeta potential yi tshinelela zero, naswona emulsion yi hatlisa ku destabilizes naswona yi hundza eka coagulation leyi nga hundzukiki.

Vuyelo byo Tiyisisa bya Ntivo-mbango wa Alkaline

Ti emulsions ta PTFE leti xavisiwaka ti hlayisiwa tiri na alkaline yoka yingari kahle ngopfu ngopfu hikokwalaho ka swivangelo leswi landzelaka:

· Ku sivela kukula ka ti microbial : Ndzhawu leyinga tsana ya alkaline yi tshikelela kukula ka ti bacteria, leswi endlaka leswaku tinga dyi ti surfactants xikan’we naku nga tshamiseki emulsion.

· Ku tshikileriwa ka ku onhaka ka acid : Ndzhawu ya alkaline yi herisa swilo leswi saleke swa acid kusuka eka polymerization, ku papalata ku bola ka switirhisiwa na ku onhaka ka matirhelo.

Makhombo Ya Ku Engetela Asidi

Loko ku lulamisiwa pH hi ti acids tofana na acetic acid, acid yifanele ku cheriwa hiku nonoka hi nhlayo leyintsongo hiku hlanganisiwa hiku olova naku pre-dilution. Ku engeteriwa hiku hatlisa kumbe acid yotala swita kavanyeta charge balance ya system naswona switlhela swivanga ku tshoveka ka emulsion hiku hatlisa.

2. Vuyelo eka Matirhelo ya Impregnation

Ku cheriwa ka mati swilava leswaku emulsion yi nghena kahle eka substrate naswona yi endla coating leyi fanaka. pH yikucetela endlelo leri ngopfu ngopfu hiku cinca viscosity, wettability, na surface charge ya system.

Ku nghenelela na Ku Namarhela

pH yi khumba mahanyelo ya rheological ya emulsion. pH leyi faneleke yi antswisa ku hangalaka na ku nghena ka ti capillary eka vuandlalo bya substrate naswona yi papalata swihoxo. pH yale hansi swinene kumbe yale henhla yinga hunguta ku namarhela ka coating.

Parameter ya Nkoka ya Endlelo ra Co-Coagulation

Eka kululamisela ka composite material, ku lulamisa pH swipfumelela vulawuri bya Zeta potential ya tinxaka timbirhi kumbe kutlula ta ti particles, leswi endlaka leswaku kuva na uniform na efficient co-coagulation hiku tirhisa electrostatic interaction. Xikombiso, ku lulamisa pH ya nkatsakanyo wa carbon black na PTFE emulsion kuya eka 7–10  swifikelela coagulation leyi heleleke handle ka ti coagulants to engetela.

Eka Aokai New Materials, vulawuri bya pH eka ku lulamisiwa hinkwako ka emulsion na vuhumelerisi byi katsa xirhendzevutani hinkwaxo xa vutomi bya PTFE emulsion kusuka eka vuhlayiselo kuya eka matirhelo yohetelela ya xiendliwa, leswi endlaka leswaku swiva na nkoka ku tirhisa hiku hetiseka swivumbeko leswi humelelaka swa switirhisiwa swa PTFE.

Rungula leri nga laha henhla ri nyikiwile hi Jiangsu Aokai New Materials Technology Co., Ltd.

Ku kuma vuxokoxoko bya tipharamitha, swiyimo swa xikombelo na swintshuxo leswi endleriweke wena swa nxaxamelo wa hina hinkwawo wa swikumiwa ku katsa na lapi ra mahiselo ya le henhla ya PTFE, thepi ya mahiselo ya le henhla ya PTFE, bandhi ra mesh ra mahiselo ya le henhla ya PTFE, mabandhi lama nga na swirhabyani ya michini yo boha, lapi ra PTFE ra tlhelo rin’we, mabandhi yo fambisa lama nga ni mahiselo ya le henhla lama tiyiselaka na lapi ra fiberglass ya mahiselo ya le henhla, hi kombela u hi tihlanganisa eka:

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