Iindaba

Ukusetyenziswa kweeplastiki zokwenziwa ezivela kwi-petroleum kuyacelwa umngeni ngenxa yemibandela eyaziwa kakhulu yongcoliseko olumhlophe. Ukufuna izixhobo zekhabhoni ezivuselelekayo njengenye indlela sele kubaluleke kakhulu kwaye kungxamisekile. I-Polylactic acid (PLA) ithathwa ngokubanzi njengenye indlela enokuthi ithathe indawo yezixhobo eziqhelekileyo ezisekelwe kwi-petroleum. Njengomthombo ohlaziyekayo ovela kwi-biomass eneempawu ezifanelekileyo zoomatshini, ukuhambelana kakuhle kwe-biocompatibility, kunye nokuthotywa, i-PLA ifumene ukukhula kwemarike okuqhumayo kwiiplastiki zobunjineli, imathiriyeli ye-biomedical, i-textile, izicelo zokupakisha kwimizi-mveliso. Nangona kunjalo, ukumelana nobushushu obuphantsi kunye nokuqina okuphantsi kunciphisa kakhulu uluhlu lwayo lwezicelo.

Ukudibanisa okunyibilikayo kwe-polylactic acid (PLA) kunye ne-thermoplastic silicone polyurethane (TPSiU) elastomer yenzelwe ukuqinisa i-PLA.

Iziphumo zibonise ukuba i-TPSiU yaxutywa ngokufanelekileyo kwi-PLA, kodwa akukho mpendulo yekhemikhali eyenzekayo. Ukongezwa kwe-TPSiU kwakungenayo impembelelo ecacileyo kwiqondo lokushisa lokutshintsha kweglasi kunye nokushisa okunyibilikayo kwe-PLA, kodwa kunciphisa kancinci i-crystallinity ye-PLA.

I-morphology kunye neziphumo zohlalutyo lomatshini oguqukayo zibonise ukuhambelana okungahambi kakuhle kwe-thermodynamic phakathi kwe-PLA kunye ne-TPSiU.

Uphononongo lokuziphatha kweRheological lubonise ukuba i-PLA/TPSiU iyanyibilika yayiyi-pseudoplastic fluid. Njengoko umxholo we-TPSiU wanda, i-viscosity ebonakalayo ye-PLA / TPSiU idibanisa ibonise umkhwa wokunyuka kuqala kwaye uwele. Ukongezwa kwe-TPSiU kwaba nefuthe elibonakalayo kwiipropati zemishini ye-PLA / TPSiU yokudibanisa. Xa umxholo we-TPSiU wawuyi-15 wt%, i-elongation kwikhefu ye-PLA / TPSiU yokudibanisa ifike kwi-22.3% (i-5.0 amaxesha e-PLA ecocekileyo), kwaye amandla empembelelo afikelela kwi-19.3 kJ / m2 (i-4.9 amaxesha e-PLA ecocekileyo), icebisa isiphumo esilungileyo sokuqina.

Xa kuthelekiswa ne-TPU, i-TPSiU inempembelelo engcono yokuqina kwi-PLA kwelinye icala kunye nokumelana nobushushu obungcono kwelinye icala.

Nangona kunjalo,SILIKE SI-TPVyi-patented dynamic vulcanized thermoplastic Silicone-based elastomers. Itsale inkxalabo enkulu ngenxa yomphezulu wayo kunye nokuchukumisa okungafaniyo kwesilika kunye nolusu, ukuxhathisa okugqwesileyo kokungcola, ukumelana nokukrweleka, akuqulathanga iplastiki kunye neoyile ethambisayo, akukho mngcipheko wokopha / uncangathi, akukho vumba.

Kananjalo, isiphumo esingcono sokuqina kwi-PLA.

Esi sisixhobo esikhethekileyo esikhuselekileyo kunye nokusingqongileyo, sinika indibaniselwano efanelekileyo yeepropati kunye neenzuzo ezivela kwi-thermoplastics kunye ne-rubber ye-silicone edibeneyo edibeneyo. iisuti zomphezulu onxibekayo, iiplastiki zobunjineli, imathiriyeli yebhayomedical, indwangu, izicelo zokupakishwa kwamashishini.

Ulwazi olungasentla, lucatshulwe kwiiPolymers (Basel). 2021 Jun; I-13 (12): 1953., Ukuguqulwa kwe-Toughening ye-Polylactic Acid yi-Thermoplastic Silicone Polyurethane Elastomer. kunye, i-Super Tough Poly(i-Lactic Acid) idibanisa uPhononongo oluBanzi” (RSC Adv., 2020,10,13316-13368)