Mumakore achangopfuura, nekuwedzera kuri kuda kwekuvandudza kwezvakatipoteredza uye kuenderera mberi kusimbaradzwa kwekutonga kusvibiswa kwepurasitiki yenyika, indasitiri yeChina inodegradable zvinhu yakaunza mukana wakanaka webudiriro.
Zvinhu zvitsva zvinoora, zvinotungamirirwa nemapurasitiki anoora, ayo anonzi ndiwo mushonga unoshanda zvikuru ku“kusvibiswa kuchena” kwemapurasitiki anoraswa, zviri kuramba zvichifungwa nevanhu.
Tevere, ndinoda kusuma zvimwe zvinowanzoshandiswa biodegradable zvinhu.
PLA
Polylactic acid (Poly lactic acid PLA) ndiyo inonyanya kushandiswa kuparara zvinhu, inozivikanwawo sepolylactide, iyo isipo mumasikirwo uye inowanzoitwa polymer nelactic acid sechinhu chikuru mbishi.
Nheyo yakajairika ndeyekuti sitachi mbishi zvinhu zvinoiswa kune glucose, uye ipapo glucose uye mamwe mabhakitiriya anoviriswa kuti abudise yakakwira-kuchena lactic acid, uyezve polylactic asidhi ine imwe molecular uremu inogadzirwa nemakemikari synthesis.
PBAT.
PBAT ndeye thermoplastic biodegradable plastics.Iyo copolymer yebutylene adipate uye butylene terephthalate.Iine maitiro ezvose PBA uye PBT.Iyo haina chete yakanaka ductility uye elongation panguva yekuzorora, asi zvakare ine yakanaka yekudzivirira kupisa uye maitiro ekuita.Uye zvakare, ine zvakare yakanakisa biodegradability.
Pakati pavo, zvigadzirwa zvakadai sebutanediol, oxalic acid uye PTA zviri nyore kuwanikwa uye zvinogona kushandiswa zvakanyanya mumhando dzakawanda, zvakadai sejekiseni rekugadzira, extrusion molding, blow molding nezvimwe zvakadaro.
Parizvino, iyo biodegradable zvigadzirwa zvepurasitiki zvinoshandiswa pamwero mukuru mumusika zvakagadziridzwa kana kusanganiswa, umo PBAT inonyanya kushandiswa nePLA.Semuenzaniso, iyo biodegradable purasitiki bhegi rinoshandiswa pamwero mukuru ndiro rakaumbwa zvinhu zvePLA nePBAT.
Kuenzaniswa kwezvikumbiro zvepasi pakati pePBAT nePLA
PBS.
PBS inonzi polybutylene succinate.Mumakore ekuma1990, Showa Polymer Kambani yekuJapan yakatanga kushandisa isocyanate secheni extender uye kuita neakaderera molecular huremu polyester yakagadzirwa nePolycondensation yedicarboxylic glycol kugadzirira yakakwira molecular huremu mapolymer.PBS polyester yakatanga kukwezva kutarisisa semhando nyowani yemapurasitiki anogona kuparara.Kuenzaniswa nemamwe echinyakare biodegradable polyesters, PBS ine zvakanakira mutengo wakaderera wekugadzira, wakanyanya kunyungudika, yakanaka kupisa kupisa uye michina zvinhu.tsime rayo mbishi inogona kuwanikwa kwete chete kubva petroleum zviwanikwa, asiwo kubva kune zvipenyu zviwanikwa kuvirisa.pasi pemamiriro ezvinhu ekuti mafuta uye zvimwe zviwanikwa zvisingadzokeri zviri kuwedzera kupera, hunhu uhu hune humbowo hunosvika kure.
Pfupiso, kuenzanisa kwezvinhu zvivakwa pakati pePBS,PLS,PBAT nePHA
Parizvino, zvimiro zveanowanzo shandiswa biodegradable mapurasitiki akasiyana.PLA ine kujeka kwakanaka, kupenya, kunyungudika kwakakwira uye simba, asi kusimba kwakadzika uye kuchena.PBAT ine hunhu hwezvose PBA nePBT, uye ine yakanaka ductility uye kureba panguva yekuzorora.Asi chivharo chayo chemhute yemvura uye chinodzivirira okisijeni hazvina kunaka.PBS ine yakanaka yekudzivirira mvura, kupisa kupisa uye yakazara zvivakwa, yakafara kugadzirisa tembiricha hwindo, uye ine yakanakisa kugadzirisa mashandiro mumapurasitiki anoparara.Iyo inopisa deformation tembiricha yePBS iri padyo ne100C, uye inogona kunge yakakwira kupfuura 100C mushure mekugadziriswa.Nekudaro, PBS zvakare ine zvimwe zvinokanganisa senge yakaderera kunyungudika simba uye inononoka crystallization rate.Panyaya ye biodegradability, PLA degradation mamiriro akanyanya kuomarara, PBS nePBAT zviri nyore kuderedzwa.Izvo zvinofanirwa kucherechedzwa kuti biodegradation yePLA, PBS uye PBAT haigone kuitika chero mamiriro ezvinhu, uye inowanzosvibiswa nema enzymes uye ma microorganisms munzvimbo ye compost, ivhu, mvura uye activated sludge.
Kupfupisa, kuita kwechinhu chimwe chete chinoshatisa chepurasitiki chine hurema hwayo, asi mushure mecopolymerization, kusanganisa, betsero uye kumwe kugadziridzwa, inogona kuvharidzira kushandiswa kwemapurasitiki anoraswa akadai sePE, PP mukurongedza, machira, anoraswa tableware. zvichingoenda zvakadaro.
Nguva yekutumira: 20-12-22