Nekukura kwenharaunda yevanhu, kudiwa kwezvinhu zvepurasitiki muhupenyu hwePeople's Daily kuri kuwedzera, zvakaita semabhegi epurasitiki, matireyi epurasitiki, mabhokisi epurasitiki ekudya kwemasikati nezvimwewo. Panguva iyi, kukwira kweindasitiri yekuendesa chikafu kwakawedzera kudiwa kwezvinhu zvepurasitiki. Kudiwa kwacho kuri kukanganisawo nharaunda yedu, nekuti zvigadzirwa zvepurasitiki zvinokuvadza nharaunda zvikuru.
Zvichienderana nematambudziko makuru ezvakatipoteredza, kutsvaga dzimwe nzira dzekushandisa panzvimbo pepurasitiki kwave tsika yepasi rose. Mushure mekutsvagisa nekuvandudza nguva dzose, zvigadzirwa zvePLA zvakatanga kukwira zvishoma nezvishoma padanho renhoroondo. Zvigadzirwa zvePLA zvine basa rekuora, izvo zvinogona kuora zvachose mukati memazuva makumi mapfumbamwe pakupisa kwakakodzera uye nharaunda. Panguva imwe chete, ine hupenyu hurefu hwebasa, yakachengetedzwa zvakanaka, tireyi yePLA nemudziyo wePLA nezvimwe zvigadzirwa zvinogona kuchengetwa kweanopfuura gore rimwe.
Matreyi matsva ePLA anoora uye anochengetedza nharaunda ekuisa chikafu chenyama yemichero
Poly (lactic acid) ine kugadzikana kwakanaka kwekupisa, tembiricha yekugadzirisa 170 ~ 230℃, inodzivirira solvent zvakanaka, inogona kugadziriswa nenzira dzakasiyana-siyana, dzakadai se extrusion, spinning, biaxial stretching, injection blow molding. Pamusoro pekuora, zvigadzirwa zve polylactic acid zvine biocompatibility yakanaka, gloss, transparent, hand feel uye heat resistance.
Polylactic acid (PLA) chinhu chitsva chinoora chakagadzirwa nestarch chinobva muzvirimwa zvinogona kushandiswazve zvakaita sechibage. Glucose yakawanikwa kubva mustarch ne saccharification, uye lactic acid ine kuchena kwakanyanya yakaviriswa kubva kuglucose nemamwe marudzi, uye polylactic acid ine huremu hwakati wandei yakagadzirwa nekugadzirwa kwemakemikari. Ine kugona kuora zvakanaka, uye inogona kuora zvachose netupukanana twakasikwa mushure mekushandiswa, uye pakupedzisira inogadzira kabhoni dioxide nemvura. Haisvibisi nharaunda, iyo inobatsira zvikuru pakudzivirira nharaunda, uye inozivikanwa sechinhu chisina njodzi kunharaunda. Nzira yakajairika yekurapa purasitiki ichiri kupisa, zvichikonzera huwandu hwakawanda hwegasi regreenhouse rinoburitswa mumhepo, nepo POLylactic acid plastic ichivigwa mukuora kwevhu, kabhoni dioxide zvakananga muvhu organic matter kana kunyudzwa nemiti, haizoburitswi mumhepo, haizokonzere greenhouse effect.
Poly (lactic acid) ine mukana wakasiyana mumunda wemidziyo inoraswa, zvinhu zvekurongedza chikafu nezvimwe zvigadzirwa zvinoraswa nekuti haina njodzi kumuviri wemunhu. Inogona kuora zvachose uye inosangana nezvinodiwa zvepasi rose, kunyanya European Union, United States neJapan zvekuchengetedza nharaunda. Pamusoro pezvo, mushure mekuvandudzwa kwetekinoroji, musika wakachinjwa nezvinhu zvePLA, izvo zvinogona kukunda zvinobudirira zvikanganiso zvechinhu chekutanga, uye zvimwe zvinotodzivirira kupisa kusvika 120℃, zvinogona kushandiswa semidziyo ye microwave oven.
Zvisinei, maererano nemusika uripo iye zvino, kupinza kupisa uye kugona kutsva kwezvigadzirwa zvePLA hazvienzaniswi nezvimwe zvigadzirwa zvinoora, asi mutengo wezvigadzirwa zvePLA wakakwira kupfuura zvimwe zvigadzirwa zvinoora. Vanhu vazhinji vanosarudza masaga sechigadzirwa chinoora, asi masaga anotora mafuta, anotora mvura, uye anokanganisa zvigadzirwa zvakarongedzwa. Uyewo masaga anogona kuumbwa kana asina kuoma zvakakwana.
Nguva yekutumira: Ndira-12-2022