Free radical trapping agent and application thereof

The invention relates to a free radical trapping agent and an application thereof. The chemical general formula of the free radical trapping agent is [M M (OH) ] (A ) .mH O, M and M respectively represent divalent and trivalent metal cations in a main body laminate, M is selected from any one or more than two divalent metal cations in Mg , Zn , Ni , Co , Fe and Cu , M is selected from one or more than two trivalent cations in Al < 3+>, Fe and Co , A is an interlayer object anion and is a carbonate ion, and x is 0.1-0.5. 本发明涉及一种自由基捕获剂及其应用，所述自由基捕获剂的化学通式为：[M2+1-xM3+x(OH)2]x+(Az-)x/z·mH2O，其中M2+、M3+分别代表主体层板中二价、三价金属阳离子，M2+选自Mg2+、Zn2+、Ni2+、Co2+、Fe2+、Cu2+中的任意一种或两种以上二价金属阳离子，M3+选自A13+、Fe3+、Co3+中的一种或者两种以上的的三价阳离子，Az-为层间客体阴离子，为碳酸根离子，x为0.1-0.5。