Cov kws tshawb fawb tau tsim ib lub polyurethane elastomer tshiab raws li ascorbic acid-derived dynamic covalent adaptive network (A-CCANs). Los ntawm kev siv cov txiaj ntsig synergistic ntawm keto-enol tautomerism thiab dynamic carbamate bonds, cov khoom siv ua tiav cov khoom zoo tshaj plaws: qhov kub thiab txias ntawm thermal decomposition ntawm 345 °C, qhov kev ntxhov siab ntawm 0.88 GPa, lub zog compressive ntawm 268.3 MPa (kev nqus zog ntawm 68.93 MJ · m⁻³), thiab qhov seem seem hauv qab 0.02 tom qab 20,000 lub voj voog. Nws kuj qhia txog kev kho tus kheej hauv ob peb feeb thiab kev ua haujlwm rov ua dua tshiab txog li 90%, muab kev daws teeb meem tshiab rau cov ntawv thov hauv cov khoom siv ntse thiab cov ntaub ntawv tsim kho.
Txoj kev tshawb fawb tshiab no tau tsim ib lub network dynamic covalent adaptive network (A-CCANs) siv ascorbic acid ua lub hauv paus tseem ceeb. Los ntawm kev tsim qauv keto-enol tautomerism thiab dynamic carbamate bonds, ib lub polyurethane elastomer zoo kawg nkaus tau tsim. Cov khoom siv no qhia tau tias polytetrafluoroethylene (PTFE) zoo li tiv taus cua sov - nrog rau qhov kub ntawm kev puas tsuaj thermal siab txog 345 ° C - thaum ua kom pom qhov sib npaug zoo meej ntawm kev ruaj khov thiab kev ywj pheej: qhov kev ntxhov siab tawg tiag tiag ntawm 0.88 GPa, thiab lub peev xwm los tswj kev ntxhov siab ntawm 268.3 MPa nyob rau hauv 99.9% compression strain thaum nqus tau 68.93 MJ · m⁻³ ntawm lub zog. Qhov zoo tshaj plaws, cov khoom siv qhia txog qhov seem ntawm tsawg dua 0.02% tom qab 20,000 lub voj voog kho tshuab, nws tus kheej kho hauv ib pliag, thiab ua tiav qhov kev siv rov qab ntawm 90%. Txoj kev tsim qauv no, uas ua tiav cov lus hais tias "muaj ob qho tib si ntses thiab taw dais," muab kev daws teeb meem tshiab rau cov ntawv thov xws li cov khoom siv ntse thiab cov ntaub ntawv cushioning aerospace, qhov twg ob qho tib si lub zog kho tshuab thiab kev ruaj khov ib puag ncig yog qhov tseem ceeb.
Lub sijhawm tshaj tawm: Lub Yim Hli-28-2025