Zinthu Zowonongeka Kwambiri za Bio-degradable
Popanga chitukuko chamakono, mitundu yonse yazinthu zamapulasitiki zimabweretsanso kuipitsa koyera.Tableware zotayidwa, zinthu zapulasitiki zotayidwa ndi filimu yapulasitiki yaulimi ndizovuta kubwezanso, ndipo njira zawo zochizira ndizongowotcha ndi kuikidwa m'manda.Kuwotcha kudzatulutsa mpweya wambiri wovulaza ndikuwononga chilengedwe.The polima mu zotayiramo sangathe kuwola ndi tizilombo kwa nthawi yochepa ndi kuipitsa chilengedwe.Kanema wa pulasitiki wotsalira amakhala m'nthaka, zomwe zimalepheretsa kukula kwa mizu ya mbewu ndi kuyamwa kwa madzi ndi zakudya, zimachepetsa kutsekemera kwa nthaka, ndikuchepetsa zokolola.Zinyama zimatha kufa chifukwa chotsekeka m'matumbo mutadya pulasitiki.Maukonde ophatikizika ophatikizika ndi mizere yotayika kapena kusiyidwa m'nyanja yawononga kwambiri zamoyo za m'madzi, motero ndikofunikira kulimbikitsa madyedwe obiriwira ndikulimbikitsa kuteteza chilengedwe.Zinthu zosawonongeka zomwe zikugwirizana ndi zomwe zikuchitika chifukwa chaukadaulo wapamwamba komanso zoteteza zachilengedwe zikukhala malo opangira kafukufuku ndi chitukuko.
Chimodzi ndi zinthu zomwe zimatha kuwonongeka kwathunthu, monga polima cellulose wachilengedwe, polycaprolactone, ndi zina zambiri, zomwe kuwonongeka kwake kumachokera ku: ①Kukula mwachangu kwa tizilombo toyambitsa matenda kumabweretsa kugwa kwa pulasitiki;② Chifukwa cha tizilombo toyambitsa matenda, enzyme catalysis kapena acid-base catalysis ya hydrolysis yosiyanasiyana;③ Kuwonongeka kwa unyolo wa ma free radicals omwe amayamba chifukwa cha zinthu zina.
Gulu lina ndi zinthu zomwe zimasokoneza zinthu, monga wowuma ndi polyethylene blends, zomwe kuwonongeka kwawo kumachitika makamaka chifukwa cha kuwonongeka kwa zowonjezera komanso kufooka kwa unyolo wa polima, zomwe zimapangitsa kuti mamolekyu a polymer awonongeke kwambiri mpaka atha kugayidwa ndi polima. Tizilombo tating'onoting'ono, ndipo pomaliza mpaka mpweya woipa (CO2) ndi madzi.
Zambiri zamoyo-zida zowonongeka zimaphatikizidwa ndi polyethylene ndi polystyrene powonjezera wowuma ndi photosensitizer.Kafukufuku wasonyeza kuti matumba a pulasitiki opangidwa ndi starch amatha kutha kutayirako, osakhudzidwa ndi kuwala kwa dzuwa, ngakhale patakhala kuwonongeka kwachilengedwe, kuwonongeka kwake kumakhala kwachilengedwe.-kunyozeka.Kuyesedwa kwa nthawi inayake kumasonyeza kuti palibe kuwonongeka koonekeratu kwa matumba a zinyalala, matumba a zinyalala alibe kuwonongeka kwachilengedwe.
Kuthetsa kuipitsidwa kwa chilengedwe, ngakhale mapulasitiki wowuma zochokera ndi ogwira kuposa zinthu pulasitiki disposable, komabe ntchito sanali biodegradable polyethylene kapena poliyesitala zipangizo monga zopangira, akhoza kukhala theka-degradable zipangizo, kuwonjezera pa wowuma anawonjezera akhoza kunyozedwa, otsala ochuluka a polyethylene kapena poliyesitala adzakhalabe ndipo osawola mokwanira, ongowola kukhala tizidutswa, osatha kubwezerezedwanso.Chifukwa chake, zida zonse zomwe zimatha kuwonongeka ndi biodegradable zimakhazikika pakufufuza kwazinthu zowonongeka.
Nthawi yotumiza: Mar-26-2023