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Nekufambira mberi kwenguva, vanhu vari kuramba vachiwedzera kutarisisa kuchengetedzwa kwezvakatipoteredza, uye indasitiri yegirinhi yekuvandudza yave nzira nyowani inotungamira. Naizvozvo, biodegradable zvinhu zvakakosha. Saka chii chinonzi bio-based materials?

Zvishandiso zveBio-based zvinoreva zvinogonekazve biomass zviwanikwa zvinogadzirwa kuburikidza nephotosynthesis semidziyo yakabikwa, iyo inoshandurwa kuita zvigadzirwa zvebhayoloji kuburikidza neiyo biological fermentation tekinoroji, yobva yacheneswa uye kuumbwa kuita polymer inoshamwaridzana nemamiriro ekunze. Biodegradable zvinhu zvinogona kuora kuita CO2 neH20 pasi pe microbial action kana composting mamiriro. Zvichienzaniswa nepetroleum based materials, bio-based materials inogona kuderedza carbon emissions inosvika 67%.

Yakajairika kabhoni emissions panguva yese yekugadzira mamwe mapolymers (kg CO2/kg zvigadzirwa):

Muhupenyu hwezuva nezuva, hatigoni kuita pasina zvigadzirwa zvepurasitiki, asi isu tose tinoziva kuti plastiki haina kushamwaridzana kwezvakatipoteredza uye ndicho chigadzirwa chikuru che "marara machena". Nekudaro, zvigadzirwa zvepurasitiki zvinowanika muhupenyu hwedu hwezuva nezuva. Somugumisiro, mapurasitiki akaora zvishoma nezvishoma ave maitiro matsva.

Kuti izvi zviitike, masayendisiti akagadzira chigadzirwa chinoodegradable -polylactic asidhi. Plastiki iyi, inoshandurwa kubva kuchirimwa starch, ine biodegradability yakanakisa uye inoenderana nenharaunda nekuda kwemaitiro ayo ekugadzirira ayo anobvisa zvakatipoteredza zvine hushamwari petrochemical raw materials. Polylactic acid (PLA) parizvino ndeimwe yeanonyanya kushandiswa, inovimbisa, uye inodhura-inoshanda biodegradable zvinhu.

Chii chinonzi PLA?

Poly (lactic acid), rakadimburirwa sePLA, inozivikanwawo sepolylactic acid,CAS 26100-51-6kanaCAS 26023-30-3. Polylactic asidhi inogadzirwa kubva kubiomass seyakabikwa zvinhu, kubva kune zvakasikwa uye ndeyechisikigo. Maitiro ekushandura ePLA ndeaya anotevera - vemakemikari vanogona kunyatso shandura starch yakabviswa muzvirimwa zvakaita sechibage kuita LA kuburikidza nehydrolysis uye microbial fermentation nhanho, uyezve kuishandura kuita PLA kuburikidza necondensation polymerization kana mhete yekuvhura polymerization, kuwana "mashiripiti" ekutendeuka. zvirimwa mumapurasitiki.

Ndeapi maitiro uye zvakanakira zve polylactic acid?

Kuora zvachose

Pasi pekuita kwema microorganisms kana composting mamiriro, inogona kuderedzwa zvachose kuita CO2 neH2O, uye hukama hwe biodegradation rate inogona kusvika pamusoro pe90% mushure memazuva zana nemakumi masere.

Natural antibacterial properties

Iyo ine imwe inhibition kugona kune Candida albicans, Escherichia coli uye Staphylococcus aureus.

Biocompatibility

Iyo raw material lactic acid chinhu chisingaperi chiri mumuviri wemunhu, uye PLA chinhu chekudyara chemunhu chakasimbiswa neFDA, icho chave chichishandiswa zvakanyanya mundima yekurapa.

Excellent processability

PLA yekugadzirisa tembiricha ndeye 170 ~ 230 ℃, uye nzira dzakasiyana dzekugadzirisa dzakadai seextrusion, kutambanudza, kuruka, kuvhuvhuta firimu, jekiseni rekugadzira, kuvhuvhuta, uye blistering inogona kushandiswa kuumba.

Kusabvira moto

Isingabatike, ine indekisi yeokisijeni yekupedzisira inosvika 21%, chizvarwa chehutsi hwepasi, uye pasina utsi hutema.

Renewable mbishi zvinhu

Iyo mbishi yePLA inobva kubiomass carbon sources inoumbwa nephotosynthesis.

Nekuwedzeredzwa zvishoma nezvishoma kwekuziva kwevanhu kwezvakatipoteredza, mapurasitiki anoodegradable achatsiva asina kushamwaridzana nemhepo petrochemical raw materials. Takatarisana nekuwedzera kugamuchirwa kwemapurasitiki anoodegradable nenzanga,PLAichawana kupinda mune dzimwe nzvimbo dzakaderera mune ramangwana.