Kev Xaiv Thiab Kev Txiav Txim Ntawm Cov Dej Txias Rau Cov Nroj Tsuag

Qhov xwm txheej rau cov xim ntoo ntawm cov xim dej kom tag nrho rau ntawm qhov chaw ntawm lub substrate yog tias lub kaum sab xis ntawm ob yog xoom, uas yog, lub zog ntawm lub substrate yog kwv yees li sib npaug ntawm cov xim ntoo ntawm cov dej. Rau cov txheej txheem dej-raws li txheej txheej, cov teeb meem ntub dej yog qhov yuav tshwm sim ntawm qee qhov substrates nrog lub zog qis, thaum lub zog ntawm cov ntoo yog qhov tsawg, feem ntau qis dua 40mN / m. Los ntawm kev ntxiv me me ntawm substrate wetting tus neeg saib xyuas, lub hom phiaj ntawm kev txo qhov nro ntawm cov txheej txheej tuaj yeem ua tiav, ua rau cov txheej txheem yooj yim dua. Qhov ua tau zoo ntawm tus neeg sawv cev ntawm lub substrate wetting nyob ntawm nws lub peev xwm los txo qhov nro ntawm lub cev txawm tias nyob rau theem kev siv qis, thaum zam qee qhov kev mob tshwm sim thaum nws cov txheej txheem thov (xws li kev ua tsis zoo ntawm cov txheej txheej, foaming yooj yim, nce dej rhiab heev. system, thiab lwm yam). Lub substrate wetting tus neeg saib xyuas tsis tau tsuas yog ua tau zoo txo ​​qhov nro ntawm lub system, ua rau kom ntub thiab permeability ntawm ntoo, tab sis kuj txhawb kev sib raug zoo ntawm defoamers thiab lub system, thiab txhim kho interlayer adhesion.

Tus neeg sawv cev ntub dej molecules ntawm substrate muaj ob qho tib si hydrophobic thiab hydrophilic functional pawg. Qhov sib ntxiv ntawm xws li cov qauv molecular yuav inevitably ua rau molecular orientation, ua rau ib tug ntse txo nyob rau hauv qhov nro ntawm cov kua. Qhov tsis-polar ib feem ntawm cov molecule nyob twj ywm nyob rau hauv cov kev taw qhia ntawm cov kua nto rau saum huab cua, thaum lub polar ib feem nyob rau hauv cov dej theem. Cov hom ntub dej rau cov substrates muaj xws li anionic surfactants, non-ionic surfactants, polyether hloov polysiloxanes, thiab lwm yam.