Akụkọ

A na-ama aka iji plastik sịntetik nke sitere na mmanụ ala nweta n'ihi okwu mmetọ ọcha a ma ama nke ukwuu. Ịchọ akụrụngwa carbon enwere ike imeghari dị ka ihe ọzọ abụrụla ihe dị ezigbo mkpa na ngwa ngwa. A na-ahụta polylactic acid (PLA) dị ka ihe ọzọ nwere ike iji dochie ihe ndị dabere na mmanụ ala. Dị ka akụrụngwa mmeghari ohuru sitere na biomass nwere akụrụngwa akụrụngwa kwesịrị ekwesị, ezigbo biocompatibility, na mmebi, PLA enwetala uto ahịa mgbawa na plastik injinia, ihe biomedical, textile, ngwa nkwakọ ngwaahịa ụlọ ọrụ. Otú ọ dị, obere okpomọkụ na-eguzogide ya na obere siri ike na-egbochi ngwa ngwa ya.

A na-eme ngwakọta nke polylactic acid (PLA) na thermoplastic silicone polyurethane (TPSiU) elastomer iji mee ka PLA sie ike.

Nsonaazụ gosiri na TPSiU jikọtara nke ọma na PLA, mana ọ nweghị mmeghachi omume kemịkal mere. Mgbakwunye TPSiU enweghị mmetụta doro anya na mgbanwe mgbanwe iko na okpomọkụ na-agbaze nke PLA, mana ntakịrị belata kristal nke PLA.

Nsonaazụ nyocha nke usoro ihe omimi na arụ ọrụ siri ike gosipụtara ndakọrịta thermodynamic adịghị mma n'etiti PLA na TPSiU.

Ọmụmụ omume rheological gosiri na PLA/TPSiU gbazee na-abụkarị mmiri mmiri pseudoplastic. Ka ọdịnaya nke TPSiU na-abawanye, viscosity pụtara ìhè nke ngwakọta PLA/TPSiU gosipụtara usoro nke ibili mbụ wee daa. Mgbakwunye nke TPSiU nwere mmetụta dị ukwuu na ihe eji arụ ọrụ nke ngwakọta PLA/TPSiU. Mgbe ọdịnaya nke TPSiU bụ 15 wt%, elongation na nkwụsị nke ngwakọta PLA / TPSiU ruru 22.3% (5.0 ugboro nke PLA dị ọcha), na mmetụta ike ruru 19.3 kJ / m2 (4.9 ugboro nke PLA dị ọcha), na-atụ aro mmetụta siri ike dị mma.

Tụnyere TPU, TPSiU nwere mmetụta siri ike ka mma na PLA n'otu aka yana nguzogide okpomọkụ ka mma n'aka nke ọzọ.

Agbanyeghị,SILIKE SI-TPVbụ ihe elastomers dabere na silikoni vulcanized nke na-adịghị ike. Ọ dọtala nchegbu dị ukwuu n'ihi elu ya na mmetụ aka pụrụ iche na silky na akpụkpọ ahụ, ezigbo nchịkọta unyi na-eguzogide, enweghị ike ịnwe plasticizer na mmanụ dị nro, enweghị ọbara ọgbụgba / nnyapade, enweghị isi.

Ọzọkwa, mmetụta siri ike ka mma na PLA.

Nke a pụrụ iche dị mma na gburugburu ebe obibi ihe enyi na enyi, na-enye ezigbo ngwakọta nke ihe onwunwe na uru sitere na thermoplastics na roba silicone jikọtara ya na nke ọma. dabara maka elu wearable, plastik injinia, ngwa biomedical, textile, ngwa nkwakọ ngwaahịa ụlọ ọrụ.

Ozi dị n'elu, ewepụtara na polymers (Basel). 2021 Jun; 13 (12): 1953., Mgbanwe siri ike nke Polylactic Acid site na Thermoplastic Silicone Polyurethane Elastomer. na, Super siri ike Poly (Lactic Acid) na-ejikọta nyocha zuru oke" (RSC Adv., 2020,10,13316-13368)