Nhau

Kushandiswa kwepurasitiki yakagadzirwa kubva mupetroleum kuri kunetsa nekuda kwenyaya dzinozivikanwa zvikuru dzekusvibiswa kwechena. Kutsvaga zviwanikwa zvekabhoni inogona kushandiswazve seimwe nzira kwave kwakakosha zvikuru uye kuri nekukurumidza. Polylactic acid (PLA) yave ichionekwa seimwe nzira inogona kushandiswa kutsiva zvinhu zvemazuva ano zvinobva mupetroleum. Sechiwanikwa chinogona kushandiswazve chinobva mubiomass chine hunhu hwakakodzera hwemakanika, kugona kushandira pamwe chete, uye kuora, PLA yakaona kukura kukuru kwemusika mumapurasitiki einjiniya, zvinhu zvekurapa, machira, uye mashandisirwo ekurongedza mumaindasitiri. Zvisinei, kuramba kwayo kupisa kwakaderera uye kuoma kwayo kwakaderera kunoderedza zvakanyanya kushandiswa kwayo.

Kusanganiswa kwe polylactic acid (PLA) ne thermoplastic silicone polyurethane (TPSiU) elastomer kwakaitwa kuti PLA isimbiswe.

Zvakabuda zvakaratidza kuti TPSiU yakabatanidzwa zvakanaka muPLA, asi hapana makemikari akaitika. Kuwedzerwa kweTPSiU hakuna kukanganisa pachena tembiricha yekuchinja kwegirazi uye tembiricha yekunyunguduka kwePLA, asi kwakaderedza zvishoma kunaka kwePLA.

Mhedzisiro yekuongorora chimiro uye dynamic mechanical yakaratidza kusawirirana kwethermodynamic pakati pePLA neTPSiU.

Zvidzidzo zveRheological zvakaratidza kuti kunyunguduka kwePLA/TPSiU kwaiwanzova mvura yepseudoplastic. Sezvo huwandu hweTPSiU hwaiwedzera, viscosity yePLA/TPSiU blends yakaratidza kukwira kwekutanga kwozodzikira. Kuwedzerwa kweTPSiU kwakakanganisa zvakanyanya hunhu hwePLA/TPSiU blends. Kana huwandu hweTPSiU hwaive 15 wt%, kureba pakuputsika kwePLA/TPSiU blend kwakasvika 22.3% (ka5.0 kaPLA yakachena), uye simba rekukanganisa rakasvika 19.3 kJ/m2 (ka4.9 kaPLA yakachena), zvichiratidza kuti simba iri raive rakanaka.

Kana tichienzanisa neTPU, TPSiU ine simba rekusimbisa PLA kune rumwe rutivi uye inodzivirira kupisa zviri nani kune rumwe rutivi.

Zvisinei,SILIKE SI-TPViSilicone-based elastomers ine simba rakafanana ne thermoplastic. Yakanyanya kushushikana nekuda kwekuti ine silky uye inonyaradza ganda, inodzivirira tsvina zvakanyanya, inodzivirira kukwenya, haina plasticizer uye mafuta anonyorovesa, haina njodzi yekubuda ropa / kunamira, haina hwema.

Uye zvakare, simba rekusimbisa PLA riri nani.

Chinhu ichi chakasarudzika chakachengeteka uye chisingakuvadzi nharaunda, chinopa musanganiswa wakanaka wehunhu uye mabhenefiti kubva kuthermoplastics uye rabha yesilicone yakabatana zvizere, machira epamusoro anopfekwa, mapurasitiki einjiniya, zvinhu zvekurapa, machira, uye mapurasitiki emaindasitiri.

Ruzivo rwuri pamusoro apa, rwakatorwa kubva kuPolymers (Basel). 2021 Chikumi; 13(12): 1953., Kugadziriswa kwePolylactic Acid neThermoplastic Silicone Polyurethane Elastomer. uye, Super Tough Poly(Lactic Acid) Inosanganisa Ongororo Yakakwana” (RSC Adv., 2020,10,13316-13368)