Nkhani

Kugwiritsiridwa ntchito kwa mapulasitiki opangidwa kuchokera ku petroleum kumatsutsidwa chifukwa cha nkhani zodziwika bwino za kuipitsa koyera. Kufunafuna zopangira kaboni zongowonjezwdwa ngati njira ina kwakhala kofunika kwambiri komanso mwachangu. Polylactic acid (PLA) yakhala ikuwoneka ngati njira ina yosinthira zinthu wamba zopangidwa ndi mafuta. Monga chida chongongowonjezedwanso chochokera ku biomass yokhala ndi makina oyenerera, kuyanjana bwino kwachilengedwe, komanso kuwonongeka, PLA yakumana ndi kukula kwa msika wamapulasitiki opangira uinjiniya, zida zamankhwala, nsalu, ntchito zamafakitale. Komabe, kukana kwake kutentha kochepa komanso kulimba kwake kumachepetsa kwambiri ntchito zake zosiyanasiyana.

Kusakaniza kwa polylactic acid (PLA) ndi thermoplastic silicone polyurethane (TPSiU) elastomer kunachitika pofuna kulimbitsa PLA.

Zotsatira zinawonetsa kuti TPSiU idaphatikizidwa bwino mu PLA, koma palibe mankhwala omwe adachitika. Kuwonjezera kwa TPSiU kunalibe zotsatira zoonekeratu pa kutentha kwa galasi ndi kutentha kwa PLA, koma kunachepetsa pang'ono crystallinity ya PLA.

Zotsatira za morphology ndi zowunikira zamakina zimawonetsa kusakwanira bwino kwa thermodynamic pakati pa PLA ndi TPSiU.

Kafukufuku wamakhalidwe amtunduwu adawonetsa kuti kusungunuka kwa PLA/TPSiU nthawi zambiri kunali pseudoplastic fluid. Pamene zomwe zili mu TPSiU zidawonjezeka, mawonekedwe owoneka bwino a PLA / TPSiU ophatikizana adawonetsa kukwera koyamba kenako kugwa. Kuwonjezera kwa TPSiU kunakhudza kwambiri makina a PLA / TPSiU. Pamene zomwe zili mu TPSiU zinali 15 wt%, elongation pakusweka kwa PLA / TPSiU blend inafika 22.3% (5.0 nthawi ya PLA yoyera), ndipo mphamvu yowonongeka inafika 19.3 kJ / m2 (4.9 nthawi ya PLA yoyera), kusonyeza zabwino toughening zotsatira.

Poyerekeza ndi TPU, TPSiU ali bwino toughening zotsatira pa PLA mbali imodzi ndi bwino kutentha kukana mbali inayo.

Komabe,SILIKE SI-TPVndi patented vulcanized thermoplastic Silicone-based elastomers. Chachititsa chidwi kwambiri chifukwa cha mawonekedwe ake ndi Kukhudza Kwapadera kwa silky komanso khungu, kukana kusonkhanitsa zinyalala, kukana bwino kukanda, kulibe pulasitiki ndi mafuta ofewetsa, kulibe magazi / chiwopsezo chomata, palibe fungo.

Komanso, kulimbitsa bwino pa PLA.

Zapaderazi zotetezeka komanso zokomera chilengedwe, zimapereka kuphatikiza kwabwino kwazinthu ndi zopindulitsa kuchokera ku thermoplastics ndi rabala ya silikoni yolumikizidwa kwathunthu. masuti ovala pamwamba, mapulasitiki a engineering, biomedical materials, nsalu, ntchito zonyamula katundu za mafakitale.

Zomwe zili pamwambazi, zotengedwa kuchokera ku Polymers (Basel). 2021 Jun; 13 (12): 1953., Kusintha Kwamphamvu kwa Polylactic Acid ndi Thermoplastic Silicone Polyurethane Elastomer. ndi, Super Tough Poly(Lactic Acid) Iphatikiza Kuwunika Kwambiri”(RSC Adv., 2020,10,13316-13368)