1. Biodegradable plastics
Biodegradable plastics xa mus rau cov yas uas muaj ntau yam kev ntsuas kev ua tau zoo tuaj yeem ua tau raws li qhov yuav tsum tau ua, cov ntsuas kev ua tau zoo tsis hloov pauv thaum lub sijhawm txee lub neej, thiab tuaj yeem degraded rau hauv cov khoom uas tsis muaj kuab paug ib puag ncig nyob rau hauv kev cuam tshuam ntawm ib puag ncig tom qab siv.Kev faib tawm ntawm cov yas degradable.Raws li daim ntawv degradation, degradable plastics yuav muab faib ua plaub pawg: biodegradable plastics, photodegradable plastics, photo- thiab biodegradable plastics, thiab dej-degradable plastics.Raws li kev faib tawm ntawm cov khoom siv raw, cov yas degradable tuaj yeem muab faib ua biodegradable plastics thiab roj av-raws li degradable plastics.Qhov zoo ntawm cov yas degradable.Biodegradable plastics muaj lawv qhov zoo nyob rau hauv cov nqe lus ntawm kev ua tau zoo, practicality, degradability, thiab cov teeb meem kev nyab xeeb.Raws li cov ntsuas kev ua tau zoo, cov yas degradable tuaj yeem ua tiav lossis dhau qhov ntsuas kev ua tau zoo ntawm cov yas yas hauv qee qhov tshwj xeeb;nyob rau hauv cov nqe lus ntawm practicality, degradable plastics muaj tib daim ntawv thov kev ua tau zoo qhia thiab kev tu cev raws li ib txwm plastics ntawm tib hom;Nyob rau hauv cov nqe lus ntawm degradability Tom qab siv, degradable plastics yuav degraded sai sai nyob rau hauv lub ntuj ib puag ncig thiab tig mus rau hauv fragments los yog non-toxic gases uas yooj yim siv los ntawm tej yam ntuj tso ib puag ncig, txo cov kev cuam tshuam rau tej yam ntuj tso ib puag ncig;hais txog cov teeb meem kev nyab xeeb, degradable plastics Cov khoom lossis cov khoom seem tsim thaum lub sij hawm degradation yuav tsis ua phem rau ib puag ncig ntuj thiab yuav tsis cuam tshuam rau kev ciaj sia ntawm tib neeg thiab lwm yam kab mob.Qhov teeb meem tseem ceeb rau kev hloov cov khoom siv niaj hnub ntawm theem no kuj yog qhov tsis zoo ntawm cov yas degradable, uas yog tias lawv cov khoom raug nqi siab dua li cov khoom qub qub lossis cov khoom siv rov ua dua tshiab.
2. Cov khoom siv rov ua dua tshiab
Recycled plastics xa mus rau cov ntaub ntawv yas uas tau txais tom qab ua cov khoom pov tseg los ntawm kev siv lub cev los yog tshuaj xws li pretreatment, yaj granulation, kev hloov kho, thiab lwm yam. nws tsuas tuaj yeem ua qee yam ntawm cov khoom yas raws li qhov sib txawv ntawm qhov kev xav tau, thiab tsim cov khoom sib xws.Ntev npaum li qhov kev rov ua dua tshiab tsis siab dhau lawm, cov khoom siv rov ua dua tshiab tuaj yeem ua kom ntseeg tau qhov kev ua tau zoo ib yam li cov khoom siv yas, lossis cov khoom siv rov ua dua tuaj yeem sib xyaw nrog cov ntaub ntawv tshiab kom muaj kev ruaj ntseg ntsuas.Txawm li cas los xij, tom qab ntau lub voj voog, qhov ntsuas kev ua tau zoo ntawm cov khoom siv rov ua dua tshiab poob qis heev los yog siv tsis tau.
3. Biodegradable yas pK recycled yas
Raws li kev sib piv, cov yas degradable muaj kev ua haujlwm ruaj khov dua thiab qis dua cov nqi siv dua.Lawv muaj qhov zoo ntawm kev hloov cov ntim, ua liaj ua teb mulch films thiab lwm yam kev siv uas muaj sij hawm siv luv luv thiab tsis tuaj yeem sib cais thiab rov siv dua;Thaum cov khoom siv rov ua dua tshiab muaj Tus nqi qis dua thiab cov nqi ua haujlwm tau zoo dua hauv daim ntawv thov xws li cov khoom siv niaj hnub, cov khoom siv hauv tsev, thiab cov khoom siv hluav taws xob uas muaj lub neej ua haujlwm ntev thiab yooj yim rau kev faib thiab rov siv dua.Ob leeg complement ib leeg.Dawb paug feem ntau yog los ntawm kev lag luam ntim khoom, thiab cov yas degradable muaj ntau chav ua si.Nrog rau kev nce qib ntawm cov cai thiab txo nqi, kev lag luam plastics degradable muaj kev cia siab rau yav tom ntej.Hauv kev lag luam ntim khoom, kev hloov pauv ntawm biodegradable plastics twb tau tsim.Plastics muaj ntau yam kev siv, thiab kev lag luam sib txawv muaj cov qauv sib txawv rau cov yas.Cov txheej txheem kev cai rau cov yas hauv kev lag luam xws li tsheb thiab cov khoom siv hauv tsev yog cov khoom siv ruaj khov thiab yooj yim rau kev sib cais, thiab cov yas ib leeg tau siv ntau, yog li cov xwm txheej ntawm cov khoom siv niaj hnub muaj zog.Hauv kev lag luam ntim khoom xws li lub hnab ntim cov hnab yas, cov thawv ntim khoom noj ceev, cov khoom ua liaj ua teb mulch films, thiab kev xa khoom xa tuaj, vim tias kev siv cov yas monomers tsawg thiab yooj yim rau cov kab mob, lawv tsis tuaj yeem sib cais tau zoo.Qhov no ua rau cov yas degradable ntau dua los ua ib qho kev hloov pauv rau cov khoom siv yas hauv cov kev lag luam no.
Biodegradable plastics yog ib qho kev daws teeb meem zoo dua rau cov pa phem dawb dua li cov yas rov ua dua tshiab.59% ntawm cov pa phem dawb yog los ntawm kev ntim khoom thiab kev ua liaj ua teb mulch yas khoom.Txawm li cas los xij, plastics rau hom kev siv no yog siv pov tseg thiab nyuaj rau rov siv dua, ua rau lawv tsis tsim nyog rau kev rov ua dua tshiab.Tsuas yog cov yas degradable tuaj yeem daws qhov teeb meem ntawm cov pa phem dawb.Tsuas yog cov hmoov txhuv nplej siab raws li cov yas, qhov nruab nrab muag tus nqi ntawm lwm cov yas degradable yog 1.5 mus rau 4 npaug ntawm cov khoom yas.Qhov no feem ntau yog vim tias cov txheej txheem tsim cov yas degradable yog qhov nyuaj dua thiab yuav tsum tau siv cov khoom siv biomolecules kim heev rau polymerization, uas ua rau cov nqi ntau lawm tsis pom.Hauv kev lag luam uas nkag siab txog tus nqi thiab kev ua tau zoo, cov khoom siv yas tseem tuav lawv qhov zoo ntawm qhov loj, tus nqi thiab kev ua tau zoo, thiab lawv txoj haujlwm tseem ruaj khov nyob rau lub sijhawm luv.Biodegradable plastics feem ntau hloov cov kev lag luam yas ib txwm muaj uas tau tsav los ntawm cov cai thiab muaj tus nqi qis dua.
Post lub sij hawm: Oct-20-2023