Xov xwm

Kev siv cov yas ua los ntawm roj av raug kev cov nyom vim muaj teeb meem paub zoo txog kev ua qias dawb. Kev nrhiav cov khoom siv carbon uas rov ua dua tshiab tau dhau los ua qhov tseem ceeb thiab ceev heev. Polylactic acid (PLA) tau raug suav hais tias yog lwm txoj hauv kev los hloov cov khoom siv roj av ib txwm muaj. Raws li cov khoom siv rov ua dua tshiab tau los ntawm biomass nrog cov khoom siv kho tshuab tsim nyog, biocompatibility zoo, thiab degradability, PLA tau ntsib kev loj hlob ntawm kev lag luam hauv cov yas engineering, cov ntaub ntawv biomedical, textile, kev siv ntim khoom lag luam. Txawm li cas los xij, nws qhov kev tiv taus cua sov qis thiab qhov tsis muaj zog ua rau nws txwv tsis pub siv ntau yam.

Kev sib xyaw ua ke ntawm polylactic acid (PLA) thiab thermoplastic silicone polyurethane (TPSiU) elastomer tau ua kom PLA tawv.

Cov txiaj ntsig qhia tau tias TPSiU tau sib xyaw ua ke zoo rau hauv PLA, tab sis tsis muaj kev cuam tshuam tshuaj lom neeg tshwm sim. Kev ntxiv TPSiU tsis muaj qhov cuam tshuam rau qhov kub hloov iav thiab qhov kub yaj ntawm PLA, tab sis me ntsis txo qhov crystallinity ntawm PLA.

Cov txiaj ntsig ntawm kev tshuaj xyuas morphology thiab dynamic mechanical tau qhia txog qhov tsis zoo ntawm thermodynamic compatibility ntawm PLA thiab TPSiU.

Cov kev tshawb fawb txog tus cwj pwm rheological qhia tau hais tias PLA/TPSiU yaj feem ntau yog cov kua pseudoplastic. Thaum cov ntsiab lus ntawm TPSiU nce ntxiv, qhov pom tseeb viscosity ntawm PLA/TPSiU blends qhia txog kev nce ua ntej thiab tom qab ntawd poob. Kev ntxiv ntawm TPSiU muaj qhov cuam tshuam tseem ceeb rau cov khoom siv kho tshuab ntawm PLA/TPSiU blends. Thaum cov ntsiab lus ntawm TPSiU yog 15 wt%, qhov elongation thaum tawg ntawm PLA/TPSiU blend ncav cuag 22.3% (5.0 npaug ntawm PLA ntshiab), thiab lub zog cuam tshuam ncav cuag 19.3 kJ / m2 (4.9 npaug ntawm PLA ntshiab), qhia txog qhov cuam tshuam zoo rau kev tawv.

Piv nrog TPU, TPSiU muaj qhov ua kom tawv dua ntawm PLA ntawm ib sab tes thiab tiv taus cua sov zoo dua ntawm qhov tod tes.

Txawm li cas los xij,SILIKE SI-TPVyog ib qho khoom siv thermoplastic silicone-based elastomers uas tau txais patented dynamic vulcanized. Nws tau kos ntau qhov kev txhawj xeeb vim nws qhov chaw nrog qhov kov zoo nkauj thiab tawv nqaij, tiv taus av zoo heev, tiv taus khawb zoo dua, tsis muaj plasticizer thiab roj softening, tsis muaj kev pheej hmoo los ntshav / nplaum, tsis muaj ntxhiab tsw.

Ib yam li ntawd, qhov cuam tshuam zoo dua ntawm PLA.

Cov khoom siv tshwj xeeb no muaj kev nyab xeeb thiab zoo rau ib puag ncig, muab kev sib xyaw ua ke zoo ntawm cov khoom thiab cov txiaj ntsig los ntawm thermoplastics thiab cov roj hmab silicone sib txuas tag nrho. Haum rau cov khoom siv hnav tau, cov yas engineering, cov ntaub ntawv biomedical, textile, cov ntawv thov ntim khoom lag luam.

Cov ntaub ntawv saum toj no, rho tawm los ntawm Polymers (Basel). 2021 Lub Rau Hli; 13 (12): 1953., Kev Hloov Kho Polylactic Acid Toughening los ntawm Thermoplastic Silicone Polyurethane Elastomer. thiab, Super Tough Poly(Lactic Acid) Blends Kev Tshuaj Xyuas Kom Paub Ntau Ntxiv”（RSC Adv., 2020,10,13316-13368）