Tam sim no,Cov khoom siv ntim khoom siv biodegradable rau cov khoom siv pleev ib cetau siv rau kev ntim khoom ruaj khov ntawm cov tshuaj pleev ib ce, daim di ncauj thiab lwm yam tshuaj pleev ib ce. Vim yog qhov tshwj xeeb ntawm cov tshuaj pleev ib ce nws tus kheej, nws tsis yog tsuas yog yuav tsum muaj qhov tsos tshwj xeeb xwb, tab sis kuj yuav tsum muaj lub ntim khoom uas ua tau raws li nws cov haujlwm tshwj xeeb.
Piv txwv li, qhov tsis ruaj khov ntawm cov khoom siv raw khoom siv pleev kom zoo nkauj yog ze li ntawm cov khoom noj. Yog li ntawd, cov ntim khoom siv pleev kom zoo nkauj yuav tsum muaj cov khoom thaiv zoo dua thaum tswj cov khoom siv pleev kom zoo nkauj. Ntawm ib sab tes, nws yog qhov tsim nyog los cais lub teeb thiab cua kom tag, zam kev oxidation ntawm cov khoom, thiab cais cov kab mob thiab lwm yam kab mob me me kom tsis txhob nkag mus rau hauv cov khoom. Ntawm qhov tod tes, nws kuj yuav tsum tiv thaiv cov khoom xyaw nquag hauv cov tshuaj pleev kom zoo nkauj kom tsis txhob raug nqus los ntawm cov ntaub ntawv ntim khoom lossis cuam tshuam nrog lawv thaum khaws cia, uas yuav cuam tshuam rau kev nyab xeeb thiab zoo ntawm cov tshuaj pleev.
Tsis tas li ntawd xwb, cov ntim khoom siv pleev kom zoo nkauj muaj cov kev cai nyab xeeb ntawm lub cev siab, vim tias nyob rau hauv cov khoom ntxiv ntawm cov ntim khoom siv pleev kom zoo nkauj, qee cov tshuaj lom neeg yuav yaj los ntawm cov tshuaj pleev kom zoo nkauj, yog li ua rau cov tshuaj pleev kom zoo nkauj muaj kuab paug.
Cov ntaub ntawv ntim khoom siv biodegradable cosmetic:
Cov khoom siv PLAmuaj kev ua tau zoo thiab biocompatibility, thiab tam sim no yog cov khoom ntim khoom siv biodegradable tseem ceeb rau cov tshuaj pleev ib ce. Cov khoom siv PLA muaj kev ruaj khov zoo thiab kev tiv thaiv kev kho tshuab, ua rau nws yog cov khoom siv zoo rau cov khoom ntim khoom siv kho kom zoo nkauj.
Cellulose thiab nws cov derivativesyog cov polysaccharides uas siv ntau tshaj plaws hauv kev tsim khoom ntim khoom thiab yog cov polymers ntuj tshaj plaws hauv ntiaj teb. Muaj cov glucose monomer units txuas ua ke los ntawm B-1,4 glycosidic bonds, uas ua rau cov saw hlau cellulose tsim cov hydrogen bonds muaj zog. Cellulose ntim khoom yog qhov tsim nyog rau kev khaws cia cov tshuaj pleev ib ce qhuav uas tsis hygroscopic.
Cov khoom siv hmoov txhuv nplej siabyog cov polysaccharides uas muaj amylose thiab amylopectin, feem ntau yog los ntawm cov nplej, cassava thiab qos yaj ywm. Cov khoom siv ua los ntawm hmoov txhuv nplej siab muaj cov hmoov txhuv nplej siab thiab lwm yam polymers, xws li polyvinyl cawv lossis polycaprolactone. Cov khoom siv thermoplastic ua los ntawm hmoov txhuv nplej siab no tau siv rau ntau yam kev siv hauv kev lag luam thiab tuaj yeem ua tau raws li cov xwm txheej ntawm kev siv extrusion, kev txhaj tshuaj molding, tshuab molding, tshuab zaj duab xis thiab ua npuas dej ntawm cov ntim khoom zoo nkauj. Haum rau cov ntim khoom zoo nkauj qhuav uas tsis hygroscopic.
Chitosanmuaj peev xwm ua cov khoom ntim khoom uas lwj tau rau cov tshuaj pleev ib ce vim nws cov haujlwm tua kab mob. Chitosan yog ib qho cationic polysaccharide uas tau los ntawm deacetylation ntawm chitin, uas yog los ntawm crustacean plhaub lossis fungal hyphae. Chitosan tuaj yeem siv ua ib txheej rau ntawm PLA zaj duab xis los tsim cov ntim khoom yooj ywm uas yog ob qho tib si lwj tau thiab antioxidant.
Lub sijhawm tshaj tawm: Lub Xya Hli-14-2023
