Kodi pali kusiyana kotani pakati pa thumba losawonongeka ndi thumba lotha kuwonongeka kwathunthu

Matumba oyikapo owonongeka, zomwe zimatanthawuza ndizowonongeka, koma matumba oyikapo owonongeka amagawidwa kukhala "owonongeka" komanso "owonongeka kwathunthu" awiri. Degradable ma CD thumba amatanthauza njira yopanga kuwonjezera kuchuluka kwa zina (monga wowuma, wowuma kusinthidwa wowuma kapena mapadi, photosensitizer, biodegradative wothandizira, etc.), kotero kuti bata la thumba ma CD thumba, ndiyeno yerekezerani mosavuta kuwononga chilengedwe. Kwathunthu degradable ma CD thumba amatanthauza thumba pulasitiki ma CD ndi kuonongeka kwathunthu madzi ndi mpweya woipa. Gwero lalikulu la zinthu zomwe zimawonongeka kwambiri zimasinthidwa kukhala lactic acid, yomwe ndi PLA, kuchokera ku chimanga ndi chinangwa.

Polylactic acid (PLA) ndi mtundu watsopano wa gawo lapansi lachilengedwe komanso zinthu zongowonjezedwanso. Glucose amachokera ku wowuma zopangira ndi saccharification, kenako lactic acid yokhala ndi chiyero chachikulu imafufutidwa kuchokera ku shuga ndi mitundu ina, kenako polylactic acid yokhala ndi kulemera kwina kwa maselo amapangidwa ndi kaphatikizidwe ka mankhwala. Ili ndi biodegradability yabwino, ndipo imatha kuonongeka kwathunthu ndi tizilombo tating'onoting'ono m'chilengedwe pansi pamikhalidwe inayake ikagwiritsidwa ntchito, ndipo pamapeto pake imatulutsa mpweya woipa ndi madzi. Simayipitsa chilengedwe, chomwe chimapindulitsa kwambiri kuteteza chilengedwe, komanso ndi zinthu zowononga zachilengedwe kwa ogwira ntchito.

Pakali pano, zinthu zazikulu zamoyo zochokera matumba ma CD owonongeka kwathunthu wapangidwa ndi PLA + PBAT, amene akhoza kuonda kwathunthu mu madzi ndi mpweya woipa mu 3-6 miyezi pansi pa chikhalidwe composting (60-70 madigiri), popanda kuipitsa. ku chilengedwe. Chifukwa chiyani kuwonjezera PBAT, katswiri wopanga ma CD osinthika, pansi pa kutanthauzira komveka ndi PBAT adipic acid, 1, 4 - butanediol, terephthalic acid copolymer, mochulukira ndi biodegradable synthetic aliphatic ndi ma polima onunkhira, PBAT ili ndi kusinthasintha kwabwino, imatha kupanga filimu extruding , kuwomba kunja kwa processing, kupaka ndi zina processing. Cholinga cha kusakanikirana kwa PLA ndi PBAT ndikuwongolera kulimba, kuwonongeka kwa biodegradation ndi kuumba kwa PLA. PLA ndi PBAT sizigwirizana, kotero kuti ntchito ya PLA ikhoza kusinthidwa kwambiri posankha oyenerera oyenerera.