Qhov twg puas ntim cov ntawv ntim khoom muaj nrog rau cov khoom ntim khoom ntim qis?
1, photodegradable plastics; nws yog degraded nyob rau hauv kev ua ntawm lub teeb, muab faib ua ob hom: molding thiab additive. Synthetic photolysis hais txog kev qhia txog qee cov saw hlau uas tsis tshua muaj zog nrog lub zog qis thiab yooj yim tawg hauv cov txheej txheem ntawm cov tshuaj sib txuas polymer, lossis sib txuas qee cov duab ntawm cov duab sib txuas thiab hloov pauv atoms uas tuaj yeem pom photolysis. Ua li no, kev tawm tsam tshuaj lom neeg yuav tshwm sim nyob rau hauv qhov kev nqis tes ntawm lub teeb, uas yuav ua rau muaj kev puas tsuaj ntawm polymer macromolecules, thiab cov saw ntev yuav tawg rau hauv cov me me molecular tawg uas yooj yim yuav nqos tau los ntawm cov kab mob me. Lub tshuab ntxiv photodegradation yog kom ntxiv qee qhov nqi ntawm cov tshuaj pleev ib qho me me rau hauv cov khoom xyaw yas, uas tseem yuav ua rau poob qis ntawm qhov kev txiav txim ntawm lub teeb. Txoj kev yog qhov yooj yim thiab tus nqi kuj tsis tshua muaj nqi.
Dab tsi yog cov ntawv ntawm cov khoom ntim tsis zoo
2. biodegradable plastics. Nws yog kab mob los ntawm kab mob, pwm thiab ntau yam kab mob. Vim tias qhov tseeb ntawm sab hauv lossis cov khoom siv hauv cov khoom tuaj yeem decomposed los ntawm cov kab mob me me, cov ntim khoom pov tseg tau zom thiab nqus tau los ntawm cov kab mob me me hauv qhov chaw nyob hauv ntuj, thiab tom qab ntawd decomposed ua hom molecular me me thiab kev koom nrog hom. Cov ntawv ntim sib xyaw biodegradable yas yog ib hom khoom siv biodegradable nyob rau hauv uas qee qhov nqi ntawm cov hmoov txhuv nplej siab, ntuj straw, nplej straw thiab txiv hmab txiv ntoo plhaub yog suav nrog. Tom qab tsim ntawm qee cov khoom ntim ntim biodegradable.
3. Cov tshuaj tiv thaiv uas tsis zoo; nws yog degraded nyob rau hauv kev sib koom tes ntawm lub teeb thiab biology. Ntxiv cov biodegradable hmoov txhuv nplej siab, tshuaj tiv thaiv degradable photosensitizer thiab tsis siv neeg oxidant rau hauv plastics yuav ua rau kev ua haujlwm ntawm plastics poob qis tom qab siv, thiab lub plastics yuav tawg rau hauv daim tsis tu ncua. Tom qab ntawd, cov yas yuav yaj mus sai heev los ntawm cov tshuaj tiv thaiv ntawm cov kab mob me me thiab tsis siv neeg oxidant.