Iindaba

Ukusetyenziswa kweeplastiki ezenziweyo ezivela kwi-petroleum kunzima ngenxa yemicimbi eyaziwayo kakhulu yongcoliseko olumhlophe. Ukufuna izixhobo zekhabhoni ezivuselelekayo njengendlela eyahlukileyo kuye kwaba yinto ebaluleke kakhulu kwaye ingxamisekileyo. I-Polylactic acid (PLA) ithathwa ngokubanzi njengendlela enokwenzeka yokutshintsha izinto eziqhelekileyo ezisekelwe kwi-petroleum. Njengesixhobo esivuselelekayo esivela kwi-biomass esineempawu ezifanelekileyo zoomatshini, ukuhambelana okuhle kwezinto eziphilayo, kunye nokubola, i-PLA ibone ukukhula okukhulu kwimarike kwiiplastiki zobunjineli, izixhobo zonyango, ilaphu, izicelo zokupakisha kwimizi-mveliso. Nangona kunjalo, ukumelana kwayo nobushushu obuphantsi kunye nokuqina okuphantsi kunciphisa kakhulu uluhlu lwezicelo zayo.

Kwenziwe umxube we-polylactic acid (PLA) kunye ne-thermoplastic silicone polyurethane (TPSiU) elastomer ukuqinisa i-PLA.

Iziphumo zibonise ukuba i-TPSiU idityaniswe ngempumelelo kwi-PLA, kodwa akukho mpendulo yamachiza eyenzekileyo. Ukongezwa kwe-TPSiU akubanga nampembelelo icacileyo kubushushu bokutshintsha kweglasi kunye nobushushu bokunyibilika kwe-PLA, kodwa kwanciphisa kancinci ubukrelekrele be-PLA.

Iziphumo zohlalutyo lwe-morphology kunye ne-dynamic mechanical zibonisa ukuhambelana okungalunganga kwe-thermodynamic phakathi kwe-PLA kunye ne-TPSiU.

Izifundo zokuziphatha kwe-rheological zibonise ukuba i-PLA/TPSiU melt yayidla ngokuba yi-pseudoplastic fluid. Njengoko umxholo we-TPSiU usanda, i-viscosity ebonakalayo ye-PLA/TPSiU blends ibonise ukuthambekela kokunyuka kuqala uze emva koko wehle. Ukongezwa kwe-TPSiU kube nefuthe elikhulu kwiimpawu zoomatshini ze-PLA/TPSiU blends. Xa umxholo we-TPSiU wawuyi-15 wt%, ubude bokuqhekeka komxube we-PLA/TPSiU bufikelele kwi-22.3% (ngokuphindwe ka-5.0 kunaleyo ye-PLA ecocekileyo), kwaye amandla empembelelo afikelela kwi-19.3 kJ/m2 (ngokuphindwe ka-4.9 kunaleyo ye-PLA ecocekileyo), nto leyo ebonisa isiphumo esihle sokuqina.

Xa kuthelekiswa ne-TPU, i-TPSiU inefuthe elingcono lokuqinisa kwi-PLA kwelinye icala kwaye ikwazi ukumelana nobushushu kwelinye icala.

Nangona kunjalo,I-SILIKE SI-TPVyi-elastomers esekwe kwiSilicone ene-patent enamandla e-thermoplastic evulcanized thermoplastic. Ixhalabile kakhulu ngenxa yomphezulu wayo one-silky kunye ne-economic touch ekhethekileyo, ukumelana nokuqokelelwa kokungcola okuhle, ukumelana nokukrwela okungcono, ayinayo i-plasticizer kunye ne-oyile ethambileyo, akukho mngcipheko wokopha / ukunamathela, akukho vumba libi.

Kananjalo, isiphumo esingcono sokuqinisa kwi-PLA.

Le nto ikhethekileyo ikhuselekileyo kwaye inobuhlobo nokusingqongileyo, inika indibaniselwano elungileyo yeempawu kunye neenzuzo ezivela kwi-thermoplastics kunye nerabha ye-silicone edityaniswe ngokupheleleyo, ifanelekile kumphezulu onxibekayo, iiplastiki zobunjineli, izixhobo zonyango, ilaphu, kunye nokusetyenziswa kokupakisha kwimizi-mveliso.

Ulwazi olungasentla, lucatshulwe kwiPolymers (Basel). 2021 Juni; 13(12): 1953., Ukuguqulwa kwePolylactic Acid yiThermoplastic Silicone Polyurethane Elastomer. kunye ne, Super Tough Poly(Lactic Acid) Blends A Comprehensive Review” (RSC Adv., 2020,10,13316-13368)