Litaba

Tšebeliso ea lipolasetiki tsa maiketsetso tse nkiloeng petroleum e phephetsoa ka lebaka la litaba tse tsebahalang haholo tsa tšilafalo e tšoeu. Ho batla mehloli ea khabone e nchafalitsoeng e le mokhoa o mong ho se ho bohlokoa haholo ebile ho potlakile. Polylactic acid (PLA) e 'nile ea nkoa e le mokhoa o mong o ka sebelisoang ho nkela thepa e tloaelehileng ea peterole. E le sesebelisoa se ka nchafatsoang se nkiloeng ho biomass se nang le thepa e nepahetseng ea mochini, biocompatibility e ntle, le ho senyeha, PLA e bile le kholo e phatlohileng ea mmaraka ho lipolasetiki tsa boenjiniere, lisebelisoa tsa biomedical, masela, lits'ebetso tsa ho paka tsa indasteri. Leha ho le joalo, khanyetso ea eona e tlase ea mocheso le boima bo tlase bo fokotsa haholo mefuta ea eona ea lits'ebetso.

Ho qhibiliha ha polylactic acid (PLA) le thermoplastic silicone polyurethane (TPSiU) elastomer ho ile ha etsoa ho tiisa PLA.

Liphello li bontšitse hore TPSiU e ne e kopantsoe ka katleho ho PLA, empa ha ho na karabelo ea lik'hemik'hale e ileng ea etsahala. Ho eketsoa ha TPSiU ha hoa ka ha e-ba le phello e totobetseng mocheso oa phetoho ea khalase le mocheso o qhibilihisang oa PLA, empa o fokolitse hanyenyane crystallinity ea PLA.

Liphetho tsa tlhahlobo ea morphology le ts'ebetso e matla ea mochini li bonts'itse tšebelisano e mpe ea thermodynamic lipakeng tsa PLA le TPSiU.

Boithuto ba boits'oaro ba ramatiki bo bonts'itse hore ho qhibiliha ha PLA/TPSiU hangata e ne e le mokelikeli oa pseudoplastic. Ha litaba tsa TPSiU li ntse li eketseha, li-viscosity tse bonahalang tsa PLA / TPSiU li bontšitse mokhoa oa ho phahama pele ebe o oa. Ho eketsoa ha TPSiU ho bile le phello e kholo ho thepa ea mochini ea li-blends tsa PLA / TPSiU. Ha litaba tsa TPSiU e ne e le 15 wt%, elongation nakong ea khefu ea motsoako oa PLA / TPSiU e fihlile ho 22.3% (makhetlo a 5.0 a PLA e hloekileng), 'me matla a ts'usumetso a fihlile ho 19.3 kJ / m2 (makhetlo a 4.9 a PLA e hloekileng), ho fana ka maikutlo a phello e ntle ya toughening.

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

Leha ho le joalo,SILIKE SI-TPVke patented vulcanized thermoplastic Silicone-based elastomers. E na le ts'oenyeho e kholo ka lebaka la bokaholimo ba eona bo nang le boits'oaro bo ikhethileng ba silika le letlalo, khanyetso e ntle ea pokello ea litšila, khanyetso e ntle ea mongoako, ha e na polasetiki le oli e nolofatsang, ha e na kotsi ea ho tsoa mali / e khomarelang, ha e na monko.

Hape, phello e betere ho PLA.

Thepa ena e ikhethang e bolokehileng le e lumellanang le tikoloho, e fana ka motsoako o motle oa thepa le melemo e tsoang ho thermoplastics le rabara ea silicone e kopantsoeng ka botlalo. lisutu tsa bokaholimo bo ka aparoang, lipolasetiki tsa boenjiniere, lisebelisoa tsa biomedical, masela, lisebelisoa tsa ho paka tsa indasteri.

Boitsebiso bo ka holimo, bo qotsitsoe ho Polymers (Basel). 2021 Jun; 13 (12): 1953., Toughening Phetoho ea Polylactic Acid ka Thermoplastic Silicone Polyurethane Elastomer. le, Super Tough Poly(Lactic Acid) e Kopanya Tlhahlobo e Felletseng”(RSC Adv., 2020,10,13316-13368)