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碱性过氧化氢预处理对慈竹木质素物化性质及结构的影响

ZHAN Yunni HUANG Chen JIAO Jian ZHOU Xuelian LYU Yan FANG Guigan

林产化学与工业Issue(6)：21-30,10.

林产化学与工业Issue(6)：21-30,10.DOI:10.20195/j.issn.0253-2417.2024094

碱性过氧化氢预处理对慈竹木质素物化性质及结构的影响

Effect of Alkaline Hydrogen Peroxide Pretreatment on the Physicochemical Properties and Structure of Bambusa emeiensis Lignin

ZHAN Yunni ¹HUANG Chen ²JIAO Jian ²ZHOU Xuelian ¹LYU Yan ²FANG Guigan¹

作者信息

1. Institute of Chemical Industry of Forest Products,CAF||Key Lab.of Biomass Energy and Material,Jiangsu Province||Key Lab.of Chemical Engineering of Forest Products,National Forestry and Grassland Administration||National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass,Nanjing 210042,China||Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing Forestry University,Nanjing 210037,China
2. Institute of Chemical Industry of Forest Products,CAF||Key Lab.of Biomass Energy and Material,Jiangsu Province||Key Lab.of Chemical Engineering of Forest Products,National Forestry and Grassland Administration||National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass,Nanjing 210042,China
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摘要

Abstract

Alkaline hydrogen peroxide(AHP)pretreatment was used to pretreat bamboo(Bambusa emeiensis),and the recovered lignin was obtained from the AHP pretreatment liquor by acid precipitation,realizing the mild and effective lignin separation.The structural properties of recovered lignin(L0-L3.0)were investigated with Fourier transform infrared spectroscopy(FT-IR),gel permeation chromatography(GPC),two-dimensional heteronuclear single-quantum coherence nuclear magnetic resonance(2D-HSQC NMR)and thermogravimetric analysis(TG).Moreover,the antioxidant activity of recovered lignin was also evaluated.The results showed that the AHP pretreatment could remove lignin effectively,the maximum of lignin removal yield was 70.97%at 3.0%H2O2 dosage,and the yield of lignin samples was up to 60.18%at 0%H2O2.The 2D-HSQC NMR spectra showed that the structure of removed lignin was well preserved,which mainly composed of syringyl(S)and guaiacyl units(G),and the values of S/G were 1.45-1.50.In addition,a predominance of β-O-4·linkages up to 54.76%-59.84%,the contents of β-β·(B)and β-5·(C)linkages were 3.04%-4.10%and 1.32%-2.73%,respectively.Gel permeation chromatography showed that compared to cellulolytic enzyme lignin(CEL),the relative molecular mass of removed lignin was lower,and the polydispersity index(PDI)was stable at around4.80.Furthermore,as the dosage of H2O2 increased from 0%to 2.0%,the removed lignin exhibited favorable thermal stability and antioxidant activity.Most of them degraded in the temperature range of 250-400℃,and the half maximal inhibitory concentrations(IC50)values of DPPH free radical scavenging ability were 17.62(L0),16.26(L1.0),and15.99(L2.0)mg/L,respectively,which were lower than28.97 mg/L of CEL.

关键词

慈竹/碱性过氧化氢预处理/回收木质素/热稳定性/抗氧化活性

Key words

Bambusa emeiensis/alkaline hydrogen peroxide pretreatment/recovered lignin/thermal stability/antioxidant activity

分类

化学化工

引用本文复制引用

ZHAN Yunni,HUANG Chen,JIAO Jian,ZHOU Xuelian,LYU Yan,FANG Guigan..碱性过氧化氢预处理对慈竹木质素物化性质及结构的影响[J].林产化学与工业,2025,(6):21-30,10.

基金项目

浙江省省院合作林业科技项目(2024SY06) （2024SY06）

江苏省生物质能源与材料重点实验室基本科研业务费(JSBEM-S-202309) （JSBEM-S-202309）

宜宾市竹产业重大攻关项目(YBZD202401) （YBZD202401）

林产化学与工业

OA北大核心

ISSN：0253-2417

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