林产化学与工业2026，Vol.46Issue(1)：91-98,8.DOI:10.20195/j.issn.0253-2417.2024225
化学机械浆制浆原料热水溶出物的抗氧化性及结构解析
Antioxidant Activity and Structural Analysis of Hot Water Residues From Chemical-mechanical Pulping Materials
摘要
Abstract
In this study,hot water residues from six kinds of eucalyptus(Ea-Ef)and two kinds of acacia(Aa and Ab)thermomechanical pulps(TMP)were prepared,and their antioxidant differences were compared.The types and structures of substances contained in the hot water residues were analyzed by non-targeted/targeted liquid chromatography-mass spectrometry(LC-MS)techniques.The structures of substances with antioxidant properties were analyzed,and the content of key antioxidant substances was quantitatively determined.The results showed that compared to single-stage bleaching(s),the bleachability of the same wood species was significantly improved under washing and bleaching(w)and the highest whiteness increased by 4.80 percentage points.The hot water residues from Eucalyptus e(Ee)had the strongest antioxidant properties,the half maximal inhibitory mass concentration(IC50)of DPPH free radical was 33.29 mg/L,which was stronger than the commercial antioxidant BHT(IC50 value was 47.38 mg/L).Meanwhile,not only phenolic hydroxyl groups but also multiple conjugated structures contributed significantly to the antioxidant properties.By comparing the content of substances that could provide antioxidant properties,it was found that the hot water residues from eucalyptus c(Ec)had the highest content of ellagic acid,and the mass fraction was 161.51 mg/kg.关键词
漂白性能/结构解析/非靶向/靶向液相色谱-质谱联用/桉木/相思木Key words
bleaching performance/structural analysis/non-targeting/targeting liquid chromatography-mass spectrometry/eucalyptus wood/acacia wood分类
化学化工引用本文复制引用
焦婷,何适,朱北平,焦健,田庆文,房桂干..化学机械浆制浆原料热水溶出物的抗氧化性及结构解析[J].林产化学与工业,2026,46(1):91-98,8.基金项目
国家自然科学基金资助项目(32271974) （32271974）
