马庆志,简飞福,王贝诺,何志阳,贾志欣,张学金,蔡慧,毛华兴.对甲基苯磺酸松木木质素的梯度分级及其特性研究[J].中国造纸,2026,45(8):136-144 本文二维码信息
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对甲基苯磺酸松木木质素的梯度分级及其特性研究
Study on Gradient Fractionation of Pine Lignin with p-Toluenesulfonic Acid and Its Properties
收稿日期:2026-03-18  修订日期:2026-04-03
DOI:10.11980/j.issn.0254-508X.2026.08.014
关键词:  木质素  分离分级  热性能  芳香族化合物
Key Words:lignin  separation and fractionation  thermal properties  aromatic compounds
基金项目:衢州市科技计划项目(2024Z009)。
作者单位邮编
马庆志* 1浙江科技大学环境与资源学院,浙江杭州,310023 310023
简飞福 1浙江科技大学环境与资源学院,浙江杭州,310023 310023
王贝诺 1浙江科技大学环境与资源学院,浙江杭州,310023 310023
何志阳 1浙江科技大学环境与资源学院,浙江杭州,310023 310023
贾志欣* 1浙江科技大学环境与资源学院,浙江杭州,310023 310023
张学金 1浙江科技大学环境与资源学院,浙江杭州,310023 310023
蔡慧* 2中国制浆造纸研究院有限公司,北京,100102 100102
毛华兴 3浙江金龙再生资源科技股份有限公司,浙江衢州,324400 324400
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摘要:采用对甲基苯磺酸(p-TsOH)/水体系在温和条件下处理松木,通过调控p-TsOH质量分数,梯度分离沉淀得到3种木质素级分PLF17%、PLF10%和PLF4%,并对其形貌、粒径、Zeta电位、玻璃化转变温度(Tg)和热解性能等理化特性进行分析。结果表明,PLF17%、PLF10%、PLF4%木质素级分的Zeta电位绝对值依次由17.5 mV增至22.6 mV,平均粒径由1 412.0 nm降至551.3 nm,Tg由185.2 ℃降至169.4 ℃,热分解温度从416 ℃降至402 ℃后趋于稳定,残炭率由35.8%降低至32.3%,愈创木基型、紫丁香基型和酚型芳香族热裂解产物总量从44.5%增至66.7%。总体而言,木质素依次呈表面带电基团与可裂解小分子增多、颗粒细化且热稳定性降低的趋势。
Abstract:In this study, pine wood was treated with a p-toluenesulfonic acid (p-TsOH)/water system under mild conditions. Three lignin fractions, PLF17%, PLF10%, and PLF4%, were obtained through gradient precipitation by adjusting the mass fraction of p-TsOH. The morphology, particle size, Zeta potential, glass transition temperature (Tg), and pyrolysis properties of the lignin fractions were analyzed. Experimental results showed that the absolute value of the Zeta potential of lignin fraction PLF17%, PLF10%, and PLF4% increased from 17.5 mV to 22.6 mV, the average particle size decreased from 1 412.0 nm to 551.3 nm, the Tg decreased from 185.2 ℃ to 169.4 ℃, the thermal decomposition temperature decreased from 416 ℃ to 402 ℃ and then stabilized, the char residue decreased from 35.8% to 32.3%, and the total amount of guaiac-type, syringo-type, and phenolic aromatic pyrolysis products increased from 44.5% to 66.7%. Overall, lignin exhibited a trend of increased surface charged groups and cleavable small molecules, finer particle size, and decreased thermal stability in sequence.
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