Hydrophobic txheej
"Phobic" los ntawm Greek hauv paus "phobos," lub ntsiab lus "kev ntshai," thiab "hydro" yog hais txog dej, uas nyob rau hauv lub ntsiab lus ntawm lo lus txhais tau tias "kev ntshai ntawm dej."
Hydrophobicity yog ib yam khoom uas tsis muaj affinity rau dej, tsis nqus los yog sib tov nrog nws, xa mus rau ib tug nto uas repels dej thiab dej-raws li cov ntaub ntawv.
Cov molecules ntawm hydrophobic agents feem ntau tsis yog-polar (tsis muaj qhov zoo lossis qhov tsis zoo rau thaj tsam), thaum dej thiab cov khoom siv dej nkag mus rau hauv qhov chaw hydrophobic, cov tee no kis tau yooj yim tawm ntawm qhov chaw.
Iav muaj ib qho kev coj cwj pwm hydrophilic los ntawm qhov xwm txheej, piv txwv li dej molecules ntog ntawm iav zoo li lo rau nws qhov chaw. Hydrophobic txheej rau iav hloov tus cwj pwm ntawm qhov chaw, ua rau lawv hydrophobic thiab repelling dej poob. Raws li txoj cai, qhov siab tshaj plaws hydrophobicity yog 180 degree, thiab nyob rau hauv cov ntaub ntawv no ib tug tee dej yog zoo kawg nkaus kheej kheej, hu rau saum npoo ntawm ib tug singular, yuav luag imperceptible point. Cov dej thiab cov khoom siv hauv dej zoo li thaws tawm ntawm qhov chaw hydrophobic, qhov uas nws zoo li yog tias nws tau tawm dag zog tawm tsam cov dej ntws thiab thawb nws mus, tab sis qhov no tsis yog qhov tshwm sim, tsuas yog tsis muaj kev nyiam ntawm qhov chaw thiab dej poob, zoo li tus poob tsis tuaj yeem tuav thiab swb lawm.
Nws ua haujlwm li cas?
Hom txheej no thaum siv rau iav ntawm lub hnub ci vaj huam sib luag hloov tus cwj pwm ntawm nws qhov chaw, uas pib ua rau cov dej ntws tawm. Cov txheej txheej hydrophobic muab cov yeeb yaj kiab tsis pom, ruaj khov uas muaj cov dej tsis zoo, cov khoom seem-tiv taus.
Thaum lub sij hawm los nag, cov dej tee uas poob rau ntawm hydrophobic nto, agglomerate thiab nws thiaj li swb tawm ntawm lub vaj huam sib luag (thaum nws yog ntsia nrog ib tug tej yam inclination) dragging cov av hais nrog lawv, yog li conferring nws tus kheej-tu khoom.
Antistatic Txheej
Ib qho Antistatic txheej muaj cov khoom uas tiv thaiv lossis txwv kev tsim hluav taws xob zoo li qub. Tus neeg sawv cev antistatic yog ib tus neeg sawv cev siv rau kev kho cov khoom siv lossis cov chaw kom txo lossis tshem tawm cov khoom sib txuam ntawm cov hluav taws xob zoo li qub.
Lub zog electrostatic tam sim no nyob rau saum npoo ntawm cov khoom yog tshwm sim los ntawm qhov tsis sib xws ntawm qhov zoo thiab qhov tsis zoo ntawm cov khoom. Lub zog no yog lub luag haujlwm rau lub zog ntawm kev nyiam ntawm cov khoom siv saum npoo thiab qee qhov av, ua rau cov khoom tso tawm ntawm cov khoom no thiab ua rau nws nyuaj rau kev ntxuav cov ntaub ntawv. Lub luag hauj lwm ntawm tus neeg sawv cev antistatic yog ua rau saum npoo los yog cov khoom nws tus kheej me ntsis conductive.
Thaum peb tham txog tus cwj pwm ntawm cov txheej txheem no ntawm cov iav ntawm lub hnub ci vaj huam sib luag, nws cov khoom muaj lub hom phiaj ntawm kev tshem tawm cov av tso rau ntawm lub khob, tsis txhob ua raws li cov av ntawm lub khob, uas ua rau cov khoom no yooj yim tshem tawm ntawm lub khob. iav ntawm lub hnub ci vaj huam sib luag.
Nws ua haujlwm li cas?
Antistatic agents yog cov tebchaw uas dissipate no electrostatic zog, txo cov attraction ntawm qhov chaw ntawm cov khoom thiab cov av hais. Yog li ntawd, antistatic coatings txo qhov attraction ntawm av thiab saum npoo ntawm lub hnub ci vaj huam sib luag, txo cov tsub zuj zuj ntawm av thiab yooj yim rau tu txheej txheem.
Qhov twg yog qhov kev xaiv zoo tshaj plaws los ua kom kuv lub hnub ci vaj huam sib luag huv si ntev dua?
Ob txheej txheej ua kom ntxuav lub hnub ci vaj huam sib luag yooj yim dua thiab pab lawv kom huv si ntev dua. Txawm li cas los xij, kev xaiv ntawm ib qho twg yuav tsum tau ua raws li hom kev nyab xeeb uas lub hnub ci vaj huam sib luag tau teeb tsa:
· Kev nyab xeeb me me, nrog rau lub caij ntuj nag los nag, kev siv tshuaj tiv thaiv zoo li qub;
· Kev nyab xeeb heev (ib puag ncig nrog los nag ntau) hydrophobic txheej yog pom zoo.
