nkhani

Pamene zinthu zikupita patsogolo, anthu akusamala kwambiri za kuteteza chilengedwe, ndipo chitukuko chobiriwira cha mafakitale chakhala chizolowezi chatsopano. Chifukwa chake, zinthu zomwe zimatha kuwola ndizofunikira kwambiri. Ndiye kodi zinthu zopangidwa ndi zinthu zachilengedwe ndi chiyani?

Zipangizo zochokera ku biomassage zimatanthauza zinthu zongowonjezedwanso zomwe zimapangidwa kudzera mu photosynthesis ngati zinthu zopangira, zomwe zimasinthidwa kukhala zinthu zamoyo kudzera muukadaulo wa biomassage, kenako zimayeretsedwa ndikusinthidwa kukhala zinthu zachilengedwe zoteteza chilengedwe zomwe zimakhala ndi polymer. Zipangizo zowola zimatha kuwola kukhala CO2 ndi H20 pansi pa mphamvu ya tizilombo toyambitsa matenda kapena kupanga manyowa. Poyerekeza ndi zinthu zochokera ku mafuta, zinthu zochokera ku biomassage zimatha kuchepetsa mpweya woipa wa carbon ndi 67%.

Kutulutsa mpweya wa kaboni nthawi yonse yopanga ma polima ena (kg CO2/kg products):

Mu moyo watsiku ndi tsiku, sitingathe kukhala opanda zinthu zopangidwa ndi pulasitiki, koma tonse tikudziwa kuti pulasitiki si yoteteza chilengedwe ndipo ndiye chinthu chachikulu chomwe chimachokera ku "zinyalala zoyera". Komabe, zinthu zopangidwa ndi pulasitiki zimapezeka paliponse m'miyoyo yathu yatsiku ndi tsiku. Zotsatira zake, mapulasitiki owonongeka pang'onopang'ono akhala njira yatsopano.

Pachifukwa ichi, asayansi apanga chinthu chomwe chimawola -asidi wa polylacticPulasitiki iyi, yomwe imasinthidwa kuchokera ku starch ya zomera, imatha kuwonongeka bwino ndipo ndi yabwino kwambiri chifukwa cha njira yake yokonzekera yomwe imachotsa zinthu zopangira petrochemical zomwe siziwononga chilengedwe. Polylactic acid (PLA) pakadali pano ndi imodzi mwa zinthu zomwe zimagwiritsidwa ntchito kwambiri, zodalirika, komanso zotsika mtengo zomwe zimatha kuwola.

Kodi PLA ndi chiyani?

Poly (lactic acid), mwachidule mongaPLA, yomwe imadziwikanso kuti polylactic acid,CAS 26100-51-6kapenaCAS 26023-30-3Asidi ya polylactic imapangidwa kuchokera ku biomass ngati zinthu zopangira, zochokera ku chilengedwe komanso kukhala za chilengedwe. Njira yosinthira PLA ndi iyi: akatswiri a zamankhwala amatha kusintha bwino starch yotengedwa kuchokera ku mbewu monga chimanga kukhala LA kudzera mu hydrolysis ndi microbial fermentation steps, ndikuisinthanso kukhala PLA kudzera mu condensation polymerization kapena ring opening polymerization, zomwe zimapangitsa kuti mbewuzo zikhale "zamatsenga" posintha mbewu kukhala mapulasitiki.

Kodi makhalidwe ndi ubwino wa polylactic acid ndi ziti?

Zowonongeka kwathunthu

Pogwiritsa ntchito tizilombo toyambitsa matenda kapena zinthu zopangira manyowa, imatha kuwonongeka kwathunthu kukhala CO2 ndi H2O, ndipo kuchuluka kwa kuwonongeka kwa zinthu zachilengedwe kumatha kufika pa 90% patatha masiku 180.

Kapangidwe kachilengedwe ka antibacterial

Ili ndi mphamvu yoletsa matenda a Candida albicans, Escherichia coli ndi Staphylococcus aureus.

Kugwirizana kwa zamoyo

Lactic acid ndi chinthu chopangidwa ndi thupi la munthu, ndipo PLA ndi chinthu chopangidwa ndi munthu chomwe chinavomerezedwa ndi FDA, chomwe chagwiritsidwa ntchito kwambiri m'zachipatala.

Kuthekera kokonza bwino kwambiri

Kutentha kwa PLA processing ndi 170 ~ 230 ℃, ndipo njira zosiyanasiyana zokonzera monga extrusion, kutambasula, kupota, kupopera filimu, kupopera jakisoni, kupopera blow, ndi matuza zingagwiritsidwe ntchito popanga.

Kusayaka moto

Sizimayaka, zimakhala ndi mpweya wabwino kwambiri wa pafupifupi 21%, utsi umakhala wochepa, komanso utsi wakuda sumakhalapo.

Zipangizo zongowonjezedwanso

Zipangizo zopangira za PLA zimachokera ku magwero a kaboni wa biomass omwe amapangidwa ndi photosynthesis.

Chifukwa cha kuwonjezeka pang'onopang'ono kwa chidziwitso cha anthu pa zachilengedwe, mapulasitiki ovunda adzalowa m'malo mwa zipangizo zopangira mafuta zomwe siziwononga chilengedwe. Poyang'anizana ndi kuvomerezedwa kwakukulu kwa mapulasitiki ovunda ndi anthu,PLAidzafika polowera m'magawo ena otsatira mtsogolo.