Cov kws tshawb fawb tau tsim ib qho tshiab polyurethane elastomer raws li ascorbic acid-derived dynamic covalent adaptive network (A-CCANs). Los ntawm leveraging cov synergistic nyhuv ntawm keto-enol tautomerism thiab dynamic carbamate bonds, cov khoom ua tiav cov khoom tshwj xeeb: lub thermal decomposition kub ntawm 345 ° C, ib tug tawg kev nyuaj siab ntawm 0.88 GPa, compressive zog ntawm 268.3 MPa (lub zog nqus ntawm 68.93 Mual.³) thiab tom qab aerosol. 20,000 cycles. Nws kuj nthuav tawm kev kho tus kheej hauv vib nas this thiab rov ua dua tshiab txog li 90%, muab cov kev daws teeb meem rau kev siv hauv cov cuab yeej ntse thiab cov khoom siv.
Txoj kev tshawb fawb no tau tsim lub dynamic covalent adaptive network (A-CCANs) siv ascorbic acid ua lub hauv paus tsev thaiv. Los ntawm kev tsim cov keto-enol tautomerism thiab dynamic carbamate bonds, ib qho txawv tshaj plaw polyurethane elastomer tau tsim. Cov khoom siv qhia tau hais tias polytetrafluoroethylene (PTFE) zoo li tshav kub tsis kam-nrog thermal decomposition kub txog li 345 ° C-thaum ua kom pom qhov sib npaug zoo ntawm kev nruj thiab yooj yim: qhov tseeb tawg kev ntxhov siab ntawm 0.88 GPa, thiab muaj peev xwm tswj tau qhov kev ntxhov siab ntawm 268.3 MPa nyob rau hauv 99.9% absorbion. MJ·m⁻³ ntawm lub zog. Txawm tias qhov zoo tshaj plaws, cov khoom siv qhia tau tias qhov seem seem ntawm tsawg dua 0.02% tom qab 20,000 lub voj voog tshuab, kho tus kheej hauv ib thib ob, thiab ua tiav cov khoom siv rov ua dua ntawm 90%. Lub tswv yim tsim qauv no, uas ua tiav cov lus pov thawj "muaj ob qho tib si ntses thiab dais paw," muab cov kev daws teeb meem rau cov ntawv thov xws li cov khoom siv ntse thiab cov khoom siv hauv aerospace cushioning, qhov twg ob qho tib si lub zog thiab ib puag ncig ua haujlwm tseem ceeb.
Post lub sij hawm: Aug-28-2025