Qhov zoo ntawm PLA ntim zaj duab xis

PLA yog ib qho ntawm cov kev tshawb fawb tshaj plaws thiab tsom mus rau biodegradable cov ntaub ntawv ob qho tib si hauv tsev thiab txawv teb chaws, nrog rau kev kho mob, ntim, thiab cov ntawv siv fiber ntau yog nws peb qhov chaw thov nrov. PLA yog tsim los ntawm ntuj lactic acid, uas muaj biodegradability zoo thiab biocompatibility. Nws lub voj voog kev thauj mus los ntawm ib puag ncig yog qis dua li cov khoom siv roj av, thiab nws suav tias yog cov khoom lag luam zoo tshaj plaws.

Polylactic acid (PLA) tuaj yeem decomposed tag nrho rau hauv carbon dioxide thiab dej nyob rau hauv tej yam ntuj tso tej yam kev mob tom qab muab pov tseg. Nws muaj cov dej tsis zoo, cov khoom siv kho tshuab, biocompatibility, tuaj yeem nqus tau los ntawm cov kab mob, thiab tsis muaj kuab paug rau ib puag ncig. PLA kuj muaj cov khoom siv zoo. Nws muaj lub zog ua haujlwm siab, ua haujlwm zoo thiab thermal stability, plasticity, processability, tsis muaj xim, permeability zoo rau oxygen thiab dej vapor, nrog rau cov pob tshab zoo, tiv thaiv pwm thiab cov kab mob, nrog rau kev pab cuam lub neej ntawm 2-3 xyoos.

Zaj duab xis raws li ntim khoom noj

Qhov tseem ceeb tshaj plaws kev ua tau zoo ntawm cov ntaub ntawv ntim yog breathability, thiab daim ntawv thov teb ntawm cov khoom no nyob rau hauv ntim yuav txiav txim raws li nws txawv breathability. Qee cov ntaub ntawv ntim khoom xav tau cov pa oxygen permeability los muab cov pa oxygen txaus rau cov khoom; Qee cov ntaub ntawv ntim yuav tsum muaj cov khoom thaiv cov pa oxygen hauv cov ntsiab lus ntawm cov khoom siv, xws li kev ntim dej haus, uas yuav tsum muaj cov ntaub ntawv uas tuaj yeem tiv thaiv cov pa oxygen nkag mus rau hauv lub ntim thiab yog li inhibit pwm kev loj hlob. PLA muaj roj barrier, dej barrier, pob tshab, thiab zoo printability.

Pob tshab

PLA muaj cov pob tshab zoo thiab glossiness, thiab nws cov kev ua tau zoo yog piv rau cov iav ntawv thiab PET, uas lwm cov yas biodegradable tsis muaj. Lub pob tshab thiab glossiness ntawm PLA yog 2-3 npaug ntawm PP zaj duab xis thiab 10 npaug ntawm LDPE. Nws cov pob tshab siab ua rau kev siv PLA ua cov khoom ntim khoom zoo nkauj. Rau kev ntim khoom qab zib, tam sim no, ntau lub hnab ntim khoom qab zib hauv khw sivPLA ntim zaj duab xis.

Cov tsos thiab kev ua tau zoo ntawm nontim zaj duab xiszoo ib yam li cov khoom qab zib ntim zaj duab xis, nrog lub siab transparency, zoo heev knot tuav, printability, thiab lub zog. Nws kuj muaj cov khoom thaiv zoo heev, uas tuaj yeem khaws cov khoom qab zib tsw qab zoo dua.

thaiv

PLA tuaj yeem ua rau cov khoom siv zaj duab xis nyias nrog cov pob tshab siab, cov khoom thaiv zoo, kev ua haujlwm zoo, thiab cov khoom siv kho tshuab, uas tuaj yeem siv rau kev ntim cov txiv hmab txiv ntoo thiab zaub. Nws tuaj yeem tsim qhov chaw cia khoom tsim nyog rau cov txiv hmab txiv ntoo thiab zaub, tswj lawv qhov tseem ceeb, ncua kev laus, thiab khaws lawv cov xim, aroma, saj, thiab tsos. Tab sis thaum siv rau cov khoom ntim khoom noj tiag tiag, qee qhov kev hloov kho tseem xav tau los hloov kho cov yam ntxwv ntawm cov khoom noj nws tus kheej, txhawm rau ua tiav cov txiaj ntsig zoo ntim.

Piv txwv li, hauv kev siv cov tswv yim, kev sim tau pom tias cov yeeb yaj kiab sib xyaw zoo dua li cov yeeb yaj kiab ntshiab. Nws Yiyao tau ntim cov zaub qhwv nrog PLA zaj duab xis ntshiab thiab PLA sib xyaw zaj duab xis, thiab khaws cia ntawm (22 ± 3) ℃. Nws tsis tu ncua kuaj cov kev hloov pauv ntawm ntau yam physiological thiab biochemical ntsuas ntawm broccoli thaum khaws cia. Cov txiaj ntsig tau pom tias PLA cov zaj duab xis sib xyaw muaj cov txiaj ntsig zoo ntawm cov zaub paj uas khaws cia hauv chav sov. Nws tuaj yeem tsim cov av noo thiab tswj cov huab cua hauv lub hnab ntim khoom uas tsim nyog rau kev tswj hwm broccoli ua pa thiab cov metabolism, tswj cov tsos mob zoo ntawm broccoli thiab khaws cia nws qhov qub tsw thiab saj, yog li ncua lub txee lub neej ntawm broccoli ntawm chav tsev kub los ntawm 23. hnub.

Antibacterial kev ua haujlwm

PLA tuaj yeem tsim qhov tsis muaj zog acidic nyob rau saum npoo ntawm cov khoom, muab lub hauv paus rau kev tiv thaiv kab mob thiab tiv thaiv pwm. Yog tias siv lwm cov tshuaj tua kab mob hauv kev sib xyaw ua ke, tus nqi tshuaj tua kab mob tuaj yeem ncav cuag ntau dua 90%, ua rau nws tsim nyog rau kev ntim tshuaj tua kab mob ntawm cov khoom. Yin Min tau kawm txog kev khaws cia ntawm ib hom tshiab ntawm PLA nano antibacterial composite zaj duab xis ntawm cov nceb noj tau siv Agaricus bisporus thiab Auricularia auricula ua piv txwv, txhawm rau txhawm rau txuas lub txee lub neej ntawm cov nceb noj tau thiab tswj lawv cov xwm txheej zoo. Cov txiaj ntsig tau pom tias PLA / rosemary tseem ceeb roj (REO) / AgO cov yeeb yaj kiab tuaj yeem ua rau txo qis cov ntsiab lus ntawm vitamin C hauv auricularia auricula.

Piv nrog LDPE zaj duab xis, PLA zaj duab xis, thiab PLA / GEO / TiO2 zaj duab xis, cov dej permeability ntawm PLA / GEO / Ag composite zaj duab xis yog qhov siab dua li ntawm lwm cov yeeb yaj kiab. Los ntawm qhov no, nws tuaj yeem xaus lus tias nws tuaj yeem tiv thaiv kev tsim cov dej condensed thiab ua tiav cov txiaj ntsig ntawm inhibiting microbial kev loj hlob; Nyob rau tib lub sijhawm, nws kuj muaj cov nyhuv antibacterial zoo heev, uas tuaj yeem cuam tshuam kev loj hlob ntawm cov kab mob thaum lub sij hawm khaws cia ntawm pob ntseg golden, thiab tuaj yeem txuas lub txee lub neej mus rau 16 hnub.

Piv nrog rau PE cling zaj duab xis zoo tib yam, PLA muaj txiaj ntsig zoo dua

Sib piv cov kev txuag ntawmPE yas zaj duab xisqhwv thiab PLA zaj duab xis ntawm broccoli. Cov txiaj ntsig tau pom tias siv PLA zaj duab xis ntim tuaj yeem cuam tshuam cov xim daj thiab qhov muag ntawm cov paj ntoo, ua kom cov ntsiab lus ntawm chlorophyll, vitamin C, thiab soluble solids hauv broccoli. PLA zaj duab xis muaj cov roj av xaiv tau zoo heev, uas pab tsim kom muaj O2 qis thiab siab CO2 cia ib puag ncig hauv PLA ntim hnab, yog li inhibiting lub neej kev ua ub no ntawm broccoli, txo cov dej poob thiab kev noj zaub mov zoo. Cov txiaj ntsig tau pom tias piv nrog PE yas qhwv ntim, PLA zaj duab xis ntim tuaj yeem txuas ntxiv lub neej txee ntawm broccoli nyob rau hauv chav tsev kub li 1-2 hnub, thiab cov nyhuv txuag tseem ceeb.