Litaba

Tšebeliso ea polasetiki ea maiketsetso e tsoang peteroleng e phephetsoa ka lebaka la litaba tse tsebahalang haholo tsa tšilafalo e tšoeu. Ho batla mehloli ea khabone e nchafatsoang e le mokhoa o mong ho fetohile habohlokoa haholo ebile ho potlakile. Asiti ea polylactic (PLA) e 'nile ea nkoa e le mokhoa o mong o ka sebelisoang ho nkela thepa e tloaelehileng e thehiloeng peteroleng sebaka. Jwalo ka mohloli o nchafatsoang o tsoang ho biomass o nang le thepa e loketseng ea mechini, ho lumellana hantle ha bio, le ho senyeha ha eona, PLA e bile le kholo e matla ea 'maraka ho polasetiki ea boenjiniere, thepa ea bongaka, masela, lits'ebetso tsa ho paka tsa indasteri. Leha ho le joalo, ho hanyetsa mocheso o tlase le ho tiea ho tlase ho fokotsa haholo mefuta ea ts'ebeliso ea eona.

Ho ile ha etsoa motsoako o qhibilihisitsoeng oa polylactic acid (PLA) le thermoplastic silicone polyurethane (TPSiU) elastomer ho tiisa PLA.

Liphetho li bontšitse hore TPSiU e kopantsoe ka katleho le PLA, empa ha ho na karabelo ea lik'hemik'hale e etsahetseng. Ho eketsoa ha TPSiU ha hoa ka ha e-ba le phello e totobetseng mochesong oa phetoho ea khalase le mocheso o qhibilihang oa PLA, empa ho ile ha fokotsa hanyane kristale ea PLA.

Liphetho tsa tlhahlobo ea sebopeho le ea mechini e matla li bontšitse ho se lumellane ho fokolang ha thermodynamic pakeng tsa PLA le TPSiU.

Lithuto tsa boitšoaro ba rheological li bontšitse hore ho qhibiliha ha PLA/TPSiU hangata e ne e le mokelikeli oa polasetiki. Ha litaba tsa TPSiU li ntse li eketseha, viscosity e bonahalang ea metsoako ea PLA/TPSiU e bontšitse mokhoa oa ho nyoloha pele ebe ea theoha. Ho eketsoa ha TPSiU ho bile le phello e kholo litšobotsing tsa mechini tsa metsoako ea PLA/TPSiU. Ha litaba tsa TPSiU e ne e le 15 wt%, bolelele ba ho robeha ha motsoako oa PLA/TPSiU bo fihlile ho 22.3% (makhetlo a 5.0 ho feta a PLA e hloekileng), 'me matla a tšusumetso a fihlile ho 19.3 kJ/m2 (makhetlo a 4.9 ho feta a PLA e hloekileng), e leng se bontšang phello e ntle ea ho tiisa.

Ha ho bapisoa le TPU, TPSiU e na le phello e betere ea ho tiisa PLA ka lehlakoreng le leng le khanyetso e betere ea mocheso ka lehlakoreng le leng.

Leha ho le jwalo,SILIKE SI-TPVke li-elastomer tse entsoeng ka thermoplastic tse nang le patent tse nang le vulcanized thermoplastic tse thehiloeng ho Silicone. E hapile matšoenyeho a mangata ka lebaka la bokaholimo ba eona bo nang le ho ama ho ikhethang ho kang silika le ho amohela letlalo, ho hanyetsa ho bokella litšila hantle, ho hanyetsa ho betere ho ngoapa, ha e na plasticizer le oli e nolofatsang, ha e na kotsi ea ho tsoa mali / ho khomarela, ha e na monko o monate.

Hape, phello e ntle ea ho tiisa PLA.

Thepa ena e ikhethang e bolokehileng le e mosa tikolohong, e fana ka motsoako o motle oa thepa le melemo ea thermoplastics le rabara ea silicone e hokahaneng ka botlalo, lisutu tsa bokaholimo bo ka aparoang, polasetiki ea boenjiniere, thepa ea bongaka, masela le lits'ebetso tsa ho paka tsa indasteri.

Tlhahisoleseding e ka hodimo, e qotsitswe ho tsoa ho Polymers (Basel). 2021 Phuptjane; 13(12): 1953., Phetoho ya ho tiisa Polylactic Acid ka Thermoplastic Silicone Polyurethane Elastomer. le, Super Tough Poly(Lactic Acid) e Kopanya Tlhahlobo e Felletseng” (RSC Adv., 2020,10,13316-13368)