Taw qhia ntawm biodegradable plastics
Lub tshuab tseem ceeb ntawm cov hauv paus ntsiab lus ntawm biodegradable plastics tuaj yeem yog thermal degradation, photooxidative degradation, hydrolytic degradation, tshuaj tiv thaiv, tshuaj tiv thaiv, hloov kho tshuab lossis biodegradation. Cov kev cuam tshuam no ua rau muaj kev cuam tshuam ntau yam hauv cov polymer, xws li kev sib tsoo ntawm kev sib tsoo, kev sib txuas sib txuas, kev sib txuas ua ke pab pawg tshem tawm cov tshuaj tiv thaiv, cov tshuaj tiv thaiv depolymerization, kev hloov pauv, thiab kev hloov pauv, thiab lwm yam. Lub hom phiaj ntawm kev txhim kho kev lag luam yas yas kev tiv thaiv nrog cov khoom muaj ob sab. Ib qho yog los ntawm thaum pib lub hnub ci lossis duab ci ci (UV), hu ua photodegradability; lwm qhov yog los ntawm kev ua roj ntsha ntawm cov kab mob me me xws li hu ua fungi, bacteria lossis algae, hu ua kev ua kom kab mob hlwb.
Cov txheej txheem photodegradation thaum kawg ua rau kev tsim ntawm ntau ntawm cov pawg hauv paus hauv cov yas (raws li ntsuas los ntawm qhov ntsuas ntawm lub hauv paus). Cov kev hais lus no tau tig los thiab ua rau kev siv tshuab biodegradation ntau heev. Cov kev tshawb fawb pom tau tias thaum lub hauv paus nthuav tawm, nws tuaj yeem oxidized rau hauv cov kua qaub nucleic. Cov oxidized nucleic acid tau nrawm metabolized los ntawm cov kab mob me me mus rau hauv CO2 thiab dej. Tus coj sib ntxiv leeb kom txo cov txheej txheem hloov mus los ntawm ob txoj kev hloov pauv ntawm cov txheej txheem.
Lub tshuab photodegradation ntawm lub hauv paus ntsiab lus ntawm biodegradable plastics yog tias tus neeg sawv cev ntawm photodegradation yog kev hloov khoom hlau thiab muaj cov organic sib txuas nrog kev sib txuas ob npaug. Photochemical cov tshuaj tiv thaiv tshwm sim nyob rau hauv kev ua kom pom tseeb, ua kom muaj qhov hluav taws xob dhau mus, hloov cov hydrogen rau ntawm cov nplai polymer, thiab ua rau cov saw molecular tawg. Yog li ua tiav kev ua kom tsis zoo ntawm cov polymer. Tus neeg sawv cev photodegradation tau muab faib ua kev hloov pauv cov hlau txuas (kev nyuaj) thiab benzophenone compound.
Lub tshuab biodegradation ntawm lub hauv paus ntsiab lus ntawm biodegradable plastics yog tias biodegradants tuaj yeem siv cov kev ua ntawm cov kab mob, cov kab mob hu ua fungi thiab hluav taws xob los ua kev puas tsuaj rau cov khoom siv yas los ntawm kev loj hlob ntawm cov roj ntsha, lossis tsim cov tshiab los ntawm kev ua cov kab mob me. Cov tshuaj, lossis ncaj qha ua rau cov khoom sib txawv ntawm cov khoom yas, tsim pwm, uas ua rau cov yas tawg, oxidize, thiab tawg txoj saw hlau. Biodegradants feem ntau yog cov hmoov nplej xws li pob kws, qos yaj ywm, thiab nplej.
Teeb / biodegradable plastics yog cov khoom siv yas uas nthuav tawm lub hnub ci rau hauv av thiab hla ntawm photodegradation raws li cov tshuab photodegradation. Thaum cov khoom lag luam yas nyob hauv cov av qis, kev tiv thaiv biodegradation tshwm sim raws li kev siv tshuab biodegradation. Deplable plastics yog ua los ntawm cob + + photosensitizer + photodegradation modifier lossis resin + biodegradable material + photosensitizer + lwm tus.
peb muab patented puv biodegradable zaj duab xis thiab lub hnab PVA, tag nrho cov khoom yog tsim los ntawm cov cuab yeej siv casting, Nws txawv ntawm cov tshuab moulding khoom, tag nrho cov tshuab moulding khoom tsis puv biodegradable. Peb tuaj yeem tsim pva zaj duab xis thiab hnab txhua lub pob tshab thiab ntau yam xim.
peb kuj muab cov khoom siv organic puv biodegradable zaj duab xis thiab hnab nrog cov khoom muaj ntawv pov thawj muaj txheej txheem thiab cov txheej txheem.
Xav paub ntau ntxiv PVA zaj duab xis thiab hnab khoom thov mus saib peb:
http://www.joyful-printing.net/pva-bag/
http://www.joyful-printing.com/pva-bag/ eng nkaus xwb