Hauv kev siv tshuaj tua kab, kev siv ncaj qha ntawm cov khoom xyaw nquag yog tsawg. Feem ntau cov formulations muaj kev sib tov tshuaj tua kab nrog adjuvants thiab cov kuab tshuaj los txhim khu kev ua tau zoo thiab txo nqi. Surfactants yog qhov tseem ceeb adjuvants uas ua kom cov tshuaj tua kab kom ua tau zoo thaum txo cov nuj nqis, feem ntau los ntawm emulsification, foaming / defoaming, dispersion, thiab ntub dej. Lawv txoj kev siv dav hauv cov tshuaj tua kab yog cov ntaub ntawv zoo.
Surfactants txhim kho interfacial nro ntawm cov khoom hauv emulsions, tsim uniform thiab ruaj khov dispersion systems. Lawv cov qauv amphiphilic - ua ke nrog cov pab pawg hydrophilic thiab lipophilic - ua kom muaj kev nqus ntawm cov roj-dej cuam tshuam. Qhov no txo qhov nro ntawm lub ntsej muag thiab txo qis lub zog xav tau rau kev tsim emulsion, yog li txhim kho kev ruaj ntseg.
Dispersing tshuaj tua kab active cov khoom xyaw rau hauv dej raws li micro-scale hais yields superior kev piv rau lwm yam formulations. Emulsifiers ncaj qha cuam tshuam rau kev ruaj ntseg ntawm cov tshuaj tua kab emulsions, uas nyob rau hauv lem txiav txim lawv cov hauj lwm zoo.
Lub stability nws txawv nrog droplet loj:
● Particles <0.05 μm: Solubilized hauv dej, ruaj khov heev.
● Particles 0.05–1 μm: Feem ntau yaj, kuj ruaj khov.
● Particles 1–10 μm: Ib nrab sedimentation lossis nag lossis daus thaum lub sijhawm.
● Cov Particles> 10 μm: Pom pom, tsis ruaj khov heev.
Raws li cov qauv tshuaj tua kab hloov zuj zus mus, cov organophosphates uas muaj tshuaj lom ntau tau raug hloov los ntawm kev nyab xeeb dua, muaj txiaj ntsig zoo dua, thiab cov tshuaj lom neeg tsawg. Heterocyclic compounds-xws li pyridine, pyrimidine, pyrazole, thiazole, thiab triazole derivatives-feem ntau muaj nyob rau hauv cov khoom uas tsis muaj solubility nyob rau hauv cov pa hnyav. Qhov no yuav tsum tau tshiab, ua haujlwm siab, tsis muaj tshuaj lom emulsifiers rau lawv cov qauv.
Tuam Tshoj, tus thawj coj thoob ntiaj teb hauv kev tsim tshuaj tua kab thiab siv tshuaj tua kab, tau tshaj tawm 2.083 lab tons ntawm cov khoom siv tshuaj tua kab hauv xyoo 2018. Kev paub txog ib puag ncig tau ua rau muaj kev xav tau ntau dua. Yog li ntawd, kev tshawb fawb thiab kev siv ntawm eco-phooj ywg, cov tshuaj tua kab ua tau zoo tau txais txiaj ntsig. High-quality surfactants, raws li cov khoom tseem ceeb, ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov cuab yeej tshuaj tua kab kom ruaj khov.
Post lub sij hawm: Aug-13-2025