Imininingwane Yezihlungi Ze-Membrane ye-PTFE

Isihlungi se-membrane se-PTFE sinokuhambisana okuhle kakhulu kwamakhemikhali, ukuze siphinde sisetshenziselwe ukuhlungwa kwezinyibilikisi nama-asidi, ezinye izihlungi ezingamelani nazo.Ngenxa yezimpawu zabo ze-hydrophobic, kufanele zifakwe ngaphambili nge-ethanol noma i-methanol ngaphambi kokuhlunga kwemidiya enamanzi.

Isingeniso

Izihlungi ze-Membrane noma "amamembrane" angamafilimu epulasitiki amancane anezilinganiso ezithile zosayizi wezimbotshana.Ekwaziwa nangokuthi izihlungi zesikrini, isisefo noma ezincane, ulwelwesi lugcina izinhlayiya noma ama-microorganisms amakhulu kunosayizi wawo wembotshana ngokuyinhloko ngokubamba indawo.Ezinye izinhlayiya ezincane kunosayizi wembotshana oshiwo zingase zigcinwe ezinye izindlela.Ulwelwesi lwe-PTFE lukhiqizwa izinqubo ezintathu ezihlukene.I-Mixed Cellulose Esters, i-Cellulose Acetate, ne-Nylon yizingqimba ezincibilikisiwe zesigaba esibuyela emuva, lapho ukuhwamuka okulawulwayo noma ukususwa kwesistimu ye-solvent eyinkimbinkimbi yakha isakhiwo esinezimbotshana.Kokubili i-PTFE ye-hydrophilic ne-hydrophobic yenziwa inqubo enelungelo lobunikazi lapho ulwelwesi lunwetshwa nge-biaxially ukuze zakhe isakhiwo esinezimbotshana.

Izici Zokusebenza Ze-PTFE Membranes

• Iqinile: Ama-membrane e-PTFE aqashelwa kokubili ukuqhuma (ubude) kanye namandla e-tensile (lateral). I-Acetate esekelwayo nenayiloni yizingqimba zesigaba esibuyela emuva eziqine kakhulu ezitholakalayo.
• Ihlanzekile ngamakhemikhali nangokwebhayoloji: Njengengxenye yohlelo oluphelele lwekhwalithi, ama-reagents okuhlanzeka okuphezulu kuphela nezinto zokusetshenziswa ezisetshenziswayo ukukhiqiza ulwelwesi lwe-PTFE.Uma sekuphonswe, ama-membrane aphathwa egumbini elihlanzekile lekilasi elingu-1000 ukuze kuncishiswe ukungcoliswa kwendawo.Nakuba ulwelwesi oluthile ludinga inani elincane (isisindo esingu-0.1–3 %) se-ejenti yokumanzisa amanzi, i-Cellulose acetate ine-extractable enamanzi aphansi kakhulu (isisindo esingu-0.1 %) kanti inayiloni, ngokwemvelo eyi-hydrophilic, ayinazo izinto zokumanzisa ezingeziwe noma izisetshenziswa.
• Ama-membrane azacile ane-porosity ephezulu: Ulwelwesi oluncane olulinganayo (imvamisa engu-150 µm) olunokuqina okuphezulu (cishe u-80%) luhlinzeka ngegesi ephezulu nokugeleza koketshezi endaweni yeyunithi ngayinye.I-porosity ephezulu iphinde inikeze indawo ephezulu yokukhangisa noma yokubopha.
• I-thermostable: Wonke ama-membrane e-PTFE angavalwa inzalo nge-autoclaving.Amazinga okushisa asebenzayo afika ku-180°C angafinyelelwa kuye nge-membrane polymer .PTFE ulwelwesi ukubonisa ukuncipha okuncane kumazinga okushisa aphakeme.

Umhlahlandlela osheshayo wokukhetha izihlungi ze-Membrane

• Thola ukuthi yiluphi uketshezi noma igesi ezohlungwa.
• Hlola ukuthi yimaphi ama-membrane ahambisana namakhemikhali.
• Nquma ubukhulu bembotshana obudingekayo ukuze uthole imiphumela oyifunayo.
• Hlola ukucaciswa kolwelwesi nganoma yiziphi izimo zenqubo ezingajwayelekile ezingase zikhawulele ukukhetha kwakho ulwelwesi (isb. izinga lokushisa).

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