温度对木质素基酚醛树脂纤维固化行为的影响

doi:10.3969/j.issn.0253-2417.2021.02.005

林产化学与工业 ›› 2021, Vol. 41 ›› Issue (2): 33-38.doi: 10.3969/j.issn.0253-2417.2021.02.005

温度对木质素基酚醛树脂纤维固化行为的影响

李欣¹^,³, 任宇¹, 刘建祥¹, 史正军¹, 郑志锋², 刘灿¹^,*()

1. 西南地区林业生物质资源高效利用国家林业和草原局重点实验室, 西南林业大学, 云南昆明 650224
2. 厦门大学能源学院, 福建厦门 361102
3. 荣县自然资源和规划局, 四川自贡 643100

收稿日期:2020-10-06 出版日期:2021-04-28 发布日期:2021-05-08
通讯作者: 刘灿 E-mail:liucan@swfu.edu.cn
作者简介:刘灿, 讲师, 硕士生导师, 研究方向为生物基材料与生物碳材料方面的研究; E-mail: liucan@swfu.edu.cn
李欣(1994-), 女, 四川荣县人, 硕士生, 主要从事农林废弃物生物质高质化利用方面的研究
基金资助:
国家重点研发计划资助项目(2017YFD0601003);云南省基础研究计划2021年面上项目;云南省重大科技专项计划（农业）(2018ZG004)

Effect of Temperature on Curing Performance of Lignin-based Phenolic Resin Fibers

Xin LI¹^,³, Yu REN¹, Jianxiang LIU¹, Zhengjun SHI¹, Zhifeng ZHENG², Can LIU¹^,*()

1. Key Laboratory of National Forestry and Grassland Administration for Highly-Efficient Utilization of Forest Biomass Resources in the Southwest China, Southwest Forestry University, Kunming 650224, China
2. College of Energy, Xiamen University, Xiamen 361102, China
3. Rongxian Natural Resources and Planning Bureau, Zigong 643100, China

Received:2020-10-06 Online:2021-04-28 Published:2021-05-08
Contact: Can LIU E-mail:liucan@swfu.edu.cn

摘要/Abstract

摘要：

为了研究温度因素对木质素酚醛树脂纤维固化性能的影响，在盐酸和甲醛质量比为1：1的凝固浴条件下，设置不同固化升温速率和固化温度进行实验。采用FT-IR、TG、DSC、力学性能测试等方法对材料性能进行表征，探讨不同温度对纤维机械性能、热性能、表面形貌等指标的影响规律，分析木质素酚醛树脂纤维的固化行为。研究结果表明：纤维原丝经过凝固浴后，在实验条件下内部材料继续发生交联反应，最终得到的固化后纤维直径均比原丝粗；固化升温速率增加能够提高固化反应的反应程度，使得热稳定性提高；升温速率过快会导致力学性能下降，固化温度高则木质素酚醛树脂纤维表面光洁度较高；随着固化温度升高，纤维的机械性能下降。最适于纤维原丝的固化温度参数为升温速率20℃/h、固化温度170℃，此条件下得到的固化纤维拉伸强度达178.24 MPa，断裂伸长率为1.49%。

关键词: 木质素, 酚醛树脂, 纤维, 固化

Abstract:

In order to study the influence of temperature factors on the properties of lignin phenolic resin fiber, different heating rates and curing reaction temperatures were set under the curing bath condition with the hydrochloric acid/formaldehyde mass ratio of 1:1. The properties of the cured materials were characterized by FT-IR, TG, DSC, and mechanical property test. The effects of different temperatures on the mechanical properties, thermal properties and surface morphology of the fibers were investigated, and the curing behavior of lignin phenolic fibers was studied. The results showed that the internal materials continued to cross-link and the diameter of the cured fibers was thicker than that of the raw fibers after curing. The degree of curing reaction and the thermal stability increased with the increase of heating rate. Too fast heating rate led to the decrease of mechanical properties. The higher the curing temperature was, the smoother the surface of lignin phenolic fiber was. The mechanical properties of the fibers decreased with the increase of curing temperature. The most suitable curing temperature factors were the curing heating rate of 20 ℃/h and curing temperature of 170 ℃. Under these conditions, the tensile strength of the cured fiber was 178.24 MPa, and the elongation at break was 1.49%.

Key words: lignin, phenolic resin, fiber, curing

中图分类号:

TQ35

李欣, 任宇, 刘建祥, 史正军, 郑志锋, 刘灿. 温度对木质素基酚醛树脂纤维固化行为的影响[J]. 林产化学与工业, 2021, 41(2): 33-38.

Xin LI, Yu REN, Jianxiang LIU, Zhengjun SHI, Zhifeng ZHENG, Can LIU. Effect of Temperature on Curing Performance of Lignin-based Phenolic Resin Fibers[J]. Chemistry and Industry of Forest Products, 2021, 41(2): 33-38.

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参考文献 18

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固化升温速率/(℃·h^-1)curing heating rate	拉伸强度/MPatensile strength	断裂伸长率/%elongation at break
15	175.54	1.50
20	178.25	1.51
25	177.04	1.47

固化升温速率/(℃·h^-1)curing heating rate	峰顶温度/℃peak temperature	反应焓/(J·g^-1)reaction enthalpy	T₅₀¹⁾/℃	残炭率/%carbon residue rate
15	160	123.26	526	37.2
20	141	27.15	530	39.3
25	151	32.98	517	37.0

固化温度/℃curing temp.	拉伸强度/MPatensile strength	断裂伸长率/%elongation at break
150	177.65	1.56
160	179.20	1.52
170	178.24	1.49

固化温度/℃curing temp.	峰顶温度/℃peak temp.	反应焓/(J·g^-1)reaction enthalpy	T₅₀/℃	残炭率/%carbon residue rate
150	146	63.48	523	37.9
160	142	89.53	530	41.5
170	141	57.45	562	39.3

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温度对木质素基酚醛树脂纤维固化行为的影响

Effect of Temperature on Curing Performance of Lignin-based Phenolic Resin Fibers

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