I-Bio-degradable Materials Ngokugcwele
Ngenkathi kwakhiwa impucuko yesimanje, zonke izinhlobo zemikhiqizo yepulasitiki nazo ziletha ukungcola okumhlophe.I-tableware elahlayo, imikhiqizo yepulasitiki elahlayo nefilimu yepulasitiki yezolimo kunzima ukuphinda isetshenziswe, futhi izindlela zabo zokwelapha ngokuyinhloko ukushiswa nokungcwaba.Ukushiswa kuzokhiqiza amagesi amaningi ayingozi futhi kungcolise imvelo.I-polymer endaweni yokulahla imfucumfucu ayikwazi ukuboliswa ngama-microorganisms isikhathi esifushane futhi ingcolise imvelo.Ifilimu yepulasitiki eyinsalela ikhona emhlabathini, okuvimbela ukukhula kwezimpande zezitshalo kanye nokumuncwa kwamanzi nezakhamzimba, kunciphisa ukungena kwenhlabathi, futhi kuholela ekunciphiseni kwesivuno sezitshalo.Izilwane zingafa ngenxa yokuvinjwa kwamathumbu ngemva kokudla ipulasitiki.Amanethi okwenziwa ngefayibha yokudoba kanye nezintambo ezilahlekile noma ezishiywe olwandle ziye zadala umonakalo omkhulu empilweni yasolwandle, ngakho-ke kubalulekile ukumela ukusetshenziswa kohlaza nokuqinisa ukuvikeleka kwemvelo.Izinto ezibolayo ezibolayo ezihambisana nethrendi njengemikhiqizo yobuchwepheshe obuphezulu kanye nemikhiqizo yokuvikelwa kwemvelo isiba indawo eshisayo yocwaningo nentuthuko.
Enye into ebolayo ngokuphelele, njenge-polymer cellulose yemvelo, i-polycaprolactone yokwenziwa, njll., ukubola kwayo ngokuyinhloko kuvela kulokhu: ①ukukhula ngokushesha kwama-microorganisms kuholela ekuwohlokeni ngokomzimba kwesakhiwo sepulasitiki;② Ngenxa yesenzo se-microbial biochemical, i-enzyme catalysis noma i-acid-base catalysis ye-hydrolysis ehlukahlukene;③ Ukuwohloka kweketango lama-radicals mahhala okubangelwa ezinye izici.
Esinye isigaba yizinto ezihlukanisa izinto eziphilayo, njengengxube yesitashi ne-polyethylene, ukubola kwayo kubangelwa ikakhulukazi ukucekelwa phansi kwezithasiselo kanye nokuba buthaka kweketango le-polymer, okubangela ukuthi isisindo samangqamuzana e-polymer siwohloke kuze kube sezingeni lokuthi singagayeka ama-microorganisms, futhi ekugcineni ku-carbon dioxide (CO2) namanzi.
Iningi le-bio-izinto ezihlakazekayo zihlanganiswa ne-polyethylene ne-polystyrene ngokungeza isitashi ne-photosensitizer.Ucwaningo selukhombisile ukuthi izikhwama zepulasitiki ezibolayo ezenziwe ngesitashi zizogcina ziphelele endaweni yokulahla imfucumfucu, zingathinteki ukukhanya kwelanga, noma ngabe kukhona ukuwohloka kwezinto eziphilayo, ukuwohloka kwawo ikakhulukazi kuyi-bio.-ukucekelwa phansi.Ukuhlolwa kwesikhathi esithile kubonisa ukuthi akukho ukuwohloka okusobala kwezikhwama zikadoti, izikhwama zikadoti azinawo umonakalo wemvelo.
Ukuxazulula ukungcoliswa kwemvelo, nakuba amapulasitiki asekelwe isitashi esebenza kangcono kunemikhiqizo yepulasitiki elahlayo, kodwa namanje sebenzisa i-polyethylene noma izinto ze-polyester ezingaboli njengezinto zokusetshenziswa, zingaba izinto eziwohlokayo kuphela, ngaphezu kwesitashi esingeziwe singacekelwa phansi. isibalo esikhulu esisele se-polyethylene noma i-polyester sisazohlala futhi singaboli ngokuphelele, sibole sibe yizicucu, ezingakwazi ukugaywa kabusha.Ngakho-ke, i-biodegradable materials ephelele iba yinto okugxilwe kuyo ocwaningweni lwezinto ezibolile.
Isikhathi sokuthumela: Mar-26-2023