Nto Pretreatment Method
Npaj ib 0.5-1% dilute tov ntawm silane coupling tus neeg sawv cev. Siv cov txheej nyias nyias rau qhov chaw huv si kom sib txuas, cia nws qhuav, thiab tom qab ntawd siv cov nplaum. Cov kuab tshuaj siv feem ntau yog dej, cawv (methanol rau methoxysilanes, ethanol rau ethoxysilanes), los yog sib xyaw dej thiab cawv. Fluoride- dej dawb thiab pheej yig, tsis yog - tshuaj lom ethanol lossis isopropanol yog nyiam. Tsuas yog rau aminoalkylsilanes, cov kev daws teeb meem npaj los ntawm lwm cov silane coupling agents yuav tsum tau ntxiv cov acetic acid ua hydrolysis catalyst, thiab pH hloov mus rau 3.5-5.5. Ntev-chain alkyl thiab phenylsilanes tsis haum rau cov tshuaj aqueous vim lawv qhov tsis zoo. Chlorosilanes thiab ethoxysilanes raug cov tshuaj condensation loj heev thaum lub sij hawm hydrolysis thiab kuj tsis tsim nyog rau aqueous lossis dej- dej cawv; lawv feem ntau yog npaj raws li dej cawv daws. Rau silane coupling cov neeg ua haujlwm nrog cov dej tsis zoo, ntxiv 0.1-0.2% (feem feem ntau) ntawm cov nonionic surfactant ua ntej ntxiv dej los tsim ib qho aqueous emulsion.
Txoj kev tsiv teb tsaws chaw
Tus neeg sawv cev silane txuas ncaj qha ntxiv rau cov khoom nplaum, feem ntau ntawm 1-5% ntawm lub hauv paus cob. Tom qab daim ntawv thov, cov coupling tus neeg sawv cev molecules tsiv mus rau qhov sib txuas sib txuas ntawm molecular diffusion, tsim kom muaj kev sib txuas. Rau cov nplaum uas yuav tsum tau kho, ib lub sij hawm yuav tsum tau tso cai tom qab daim ntawv thov ua ntej kho kom tus neeg sawv cev sib txuas ua tiav nws txoj kev tsiv teb tsaws chaw thiab ua tiav cov txiaj ntsig zoo.
