新型超支化受阻酚类抗氧剂清除自由基能力研究
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摘要
采用DPPH法和测氧法研究了新型超支化受阻酚类抗氧剂对DPPH·和ROO·的清除能力.结果表明:超支化受阻酚类抗氧剂清除自由基能力不仅与抗氧剂的结构有关,还与抗氧化条件有关.其清除自由基能力随着超支化受阻酚类抗氧剂浓度的增加而增加,随着超支化受阻酚类抗氧剂中烷基链长度的增加而降低.以正十四胺为核的超支化受阻酚类抗氧剂(R14-phenol)具有最好的清除自由基能力,清除DPPH·的速率最快,稳态时清除率为84%;抑制苯乙烯氧化的时间为2 384s,抑制速率常数为7.07×105 mol~(-1)·L~(-1)·s~(-1).
The scavenging ability of new hyperbranched hindered phenolic antioxidants to DPPH·and ROO·was investigated by DPPH and oxygen determination methods.The results showed that the scavenging ability of hyperbranched hindered phenolic antioxidants depends not only on the structure of antioxidants,but also on the antioxidant conditions.Its ability increased with increasing of the concentration of hindered phenolic antioxidants and decreased with the increasing of alkyl-chain length of the bridged groups,respectively.Hyperbranched hindered phenol(R14-phenol)with n-tetradecylamine core has the best free radical scavenging ability with the fastest rate of 84%at the steady state,the time of styrene oxidation inhibition is 2 384 sand the rate constant is 7.07×105 mol~(-1)·L~(-1)·s~(-1).
The scavenging ability of new hyperbranched hindered phenolic antioxidants to DPPH·and ROO·was investigated by DPPH and oxygen determination methods.The results showed that the scavenging ability of hyperbranched hindered phenolic antioxidants depends not only on the structure of antioxidants,but also on the antioxidant conditions.Its ability increased with increasing of the concentration of hindered phenolic antioxidants and decreased with the increasing of alkyl-chain length of the bridged groups,respectively.Hyperbranched hindered phenol(R14-phenol)with n-tetradecylamine core has the best free radical scavenging ability with the fastest rate of 84%at the steady state,the time of styrene oxidation inhibition is 2 384 sand the rate constant is 7.07×105 mol~(-1)·L~(-1)·s~(-1).
引文
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[3]陆园,战力英,宫青海,等.[J].塑料助剂,2016(2):43-50.
[4]潘江庆.[J].高分子通报,2002(1):57-66.
[5]李翠勤,孙鹏,康伟伟,等.[J].中国塑料,2016,30(8):43-49.
[6] WANG X F,XING W Y,TANG G,et al.[J].Polym Degrad Stab,2013,98(11):2391-2398.
[7] BERGER C,DIPL-ING A B.[J].Materialwiss Werkstofftech,2007,38(5):418-422.
[8] COLTRO L,MACHADO M P.[J].Polímeros,2011,21(5):390-397.
[9] PODEVA J,KOVR'OVJ,HRRLICˇKOVM,et al.[J].Polym Degrad Stab,2009,94(4):647-650.
[10] KIM T H,LEE N G.[J].Bull Korean Chem Soc,2003,24(12):1809-1813.
[11] KIM T H,OH D R.[J].Polym Degrad Stab,2004,84(3):499-503.
[12] XUE B,OGATA K,TOYOTA A.[J].Polymer,2007,48(17):5005-5015.
[13] GAO X,MENG X,WANG H,et al.[J].Polym Degrad Stab,2008,93(8):1467-1471.
[14] KASZA G,MOSNCˇKOVK,NDOR A,et al.[J].Eur Polym J,2015,68(2):609-617.
[15] LI C Q,WANG J,NING M,et al.[J].J Appl Polym Sci,2012,124(5):4127-4135.
[16]李翠勤,康伟伟,孙鹏,等.[J].分子科学学报,2017,33(1):30-36.
[17] LI Y F,LIU Z Q.[J].Eur J Pharm Sci,2011,44(1):158-163.
[18] LI Y F,LIU Z Q.[J].Free Radicals Biol Med,2012,52(1):103-108.
[19] CHEVION S,ROBERTS M A,CHEVION M.[J].Free Radicals Biol Med,2000,28(6):860-870.
[20] LIU Z Q,MA L P,ZHOU B,et al.[J].Chem Phys Lipids,2000,106(1):53-63.
[21] XIE J,SCHAICH K M.[J].J Agric Food Chem,2014,62(19):4251-4260.
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[23] LI C Q,SUN P,YU H Y,et al.[J].RSC Adv,2017,7(4):1869-1876.
[24]管骁,殷婷,韩飞.[J].高等学校化学学报,2015,36(9):1707-1712.
[25] MISHRA K,OJHA H,CHAUDHURY N K.[J].Food Chem,2012,130(4):1036-1043.
[26] HUANG D,OU B,PRIOR R L.[J].J Agric Food Chem,2005,53(6):1841-1856.