Cov txheej txheem Scouring yog cov txheej txheem physicochemical nyuaj, suav nrog kev ua haujlwm ntawm kev nkag mus, emulsifying, dispersing, ntxuav thiab chelating, thiab lwm yam.scouring tus neeg sawv cevhauv cov txheej txheem scouring feem ntau suav nrog cov hauv qab no.
1.Wetting thiab nkag mus.
Kev nkag mus yog qhov tseem ceeb hauv cov txheej txheem scouring.Ua ntej, nyob rau hauv tus txheej txheem ntawmpaj rwbkev loj hlob, galacturonic acid ntawm pectin maj mam sib txuas nrog Ca2+thiab Mg2+nyob rau hauv cov dej hauv av los tsim pectin ntsev uas yog insoluble hauv dej thiab nyuaj rau puff.Pectin tau faib rau ntawm phab ntsa ntawm cov cellulose thiab cuam tshuam cov hygroscopicity ntawm phab ntsa sab hauv, uas suav txog 98% ntawm cellulose.Cov waxy tshuaj nyob rau hauv paj rwb fiber thiab oily av nyob rau hauv residual sizing tus neeg saib xyuas ua rau nws nyuaj rau scouring tus neeg saib xyuas nkag mus rau hauv lub fibrous.xov pajqhov khoob uas muaj kev sib tshuam ntawm cov hlab ntsha ntawm qhov sib txawv.Secondly, scouring txheej txheem yog nqa tawm nyob rau hauv ib tug daws ntawm caustic soda ntawm ib tug tej yam concentration.Vim tias qhov nro ntawm cov kua dej qab ntsev yog siab heev, nws yog qhov nyuaj rau tus neeg saib xyuas kom nkag mus.Txhawm rau ua kom cov txheej txheem scouring ua tiav, nws yog ib qho tsim nyog yuav tsum tau puff cov fibers thiab txhim kho cov cuab yeej sib txuas ntawm kev daws teeb meem thiab fiber ntau, uas yuav tsum tau ntxiv cov surfactant tsim nyog uas tuaj yeem txo qhov nro ntawm cov tshuaj thiab cov kev sib tshuam ntawm cov tshuaj thiab fiber ntau.Yog li ntawd cov fiber ntau tuaj yeem tiv tauj nrog tus neeg sawv cev scouring ntau dua thiab zoo dua, ua kom cov ntub dej thiab nkag mus.
Raws li txoj kev xav ntawm kev ntub dej thiab nkag mus, los ntawm adsorption ntawm lub interface, surfactants tuaj yeem txo qis γLG thiab γLS, ua kom ntub dej yooj yim dua.Nyob rau tib lub sijhawm, nws tuaj yeem ua rau cov kua kem zoo li qub ntawm capillary nce, uas yog qhov zoo rau cov neeg sawv cev scouring kom nkag mus rau sab hauv ntawm fibers.Qhov zoo ntawm tus neeg saib xyuas scouring nyob ntawm nws lub peev xwm los txo qhov nro thiab qhov nkag mus.
2. Cov tshuaj ntxuav tes.
Lub tshuab ntxhua khaub ncaws ua haujlwm hauv cov txheej txheem scouring yog qhov nyuaj heev.Ua ntej, nws yuav tsum ua kom tsis muaj zog ntawm cov nplaum nplaum ntawm cov khoom siv saponified thiab cov khoom oily thiab cov ntaub thiab ua rau lub ntsej muag maj mam.Thiab tom qab ntawd nws tshem tawm cov roj los ntawm cov ntaub los ntawm kev ua haujlwm thiab emulsifies rau hauv cov roj-dej emulsion kom tiv thaiv nws rov qab los.Tsis yog-ionic surfactants feem ntau yog cov emulsifiers zoo heev.Thaum anionic surfactants yuav tsim ib ob txheej electrode ntawm waxy/dej interface los tiv thaiv cov roj hais los ntawm clumping ua ke, uas yog zoo los tsim ib tug ruaj khov emulsion system.Qhov thib ob, nws yuav tsum tau disperse alkaline decomposition los tiv thaiv recontamination, uas yuav ua rau kev siv cov dispersing muaj nuj nqi ntawm surfactants, thiab kuj ua hauj lwm ntawm lwm inorganic los yog organic chelating dispersing agents.
Ib hom lossis cov qauv ntawm surfactant yog qhov nyuaj rau kev ua tiav cov teebmeem saum toj no tib lub sijhawm, yog li nws yuav tsum tau sib xyaw ntau tshaj ob hom sib txawv thiab cov qauv sib txawv ntawm surfactants.Nws tuaj yeem kho lawv cov hom, qauv thiab kev cai lij choj kom tsim nyog rau Hydrophile Lipophilic Balance (HLB) kom ua tau raws li qhov yuav tsum tau ua ntawm emulsifying grease av, thiab muaj micellar ntim txaus thiab tsawg txaus CMC thiab nto nro (γCMC).Nws yuav ua rau tus neeg sawv cev scouring ua kom cov dej ntub dej zoo heev thiab zoo heev emulsification, dispersity thiab tu cov khoom.
Post lub sij hawm: Nov-14-2021