酯化木素用于PBS-CTMP纤维复合材料界面改性的研究

岳小鹏<sup>1; 2</sup>; 蔺奕存<sup>1</sup>; 徐永建<sup>1</sup>

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酯化木素用于PBS-CTMP纤维复合材料界面改性的研究

Interfacial Modification Effect of Esterified Lignin in Poly (butylene succinate)-Chemi-thermo Mechnical Pulp Fiber Composites

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DOI：10.11980/j.issn.0254-508X.2016.08.004

关键词: PBS CTMP纤维复合材料酯化木素界面改性

Key Words:PBS CTMP fiber composites esterified lignin interfacial modification

基金项目:华南理工大学制浆造纸工程国家重点实验室开放基金(201469)；陕西科技大学学术带头人团队项目(2013XSD25)。

作者	单位
岳小鹏^1,2	1.陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安,710021；2.华南理工大学制浆造纸工程国家重点实验室,广东广州,510640
蔺奕存¹	1.陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安,710021
徐永建¹	1.陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安,710021

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摘要:木素与脂肪族酰氯通过酯化反应得到酯化木素,将酯化木素作为界面改性剂改性化学热磨机械浆（CTMP）纤维，并将其应用于聚丁二酸丁二醇酯(PBS)-CTMP纤维复合材料,研究了酯化木素对改性后CTMP纤维制备复合材料性能的影响。接触角测定数据表明,与未反应木素相比,酯化木素的疏水性提高。PBS-CTMP纤维复合材料的力学性能显著提高,以质量分数为2.0%(相对于纤维)的酯化木素(以棕榈酰氯,n(—COCl)∶n(—OH)=3∶2合成)表面处理的纤维制备的复合材料,拉伸强度、冲击强度和弯曲强度分别较未处理CTMP纤维制备的复合材料提高了25.1%、22.4%和19.3%。扫描电镜（SEM）分析表明,以酯化木素处理过的纤维与基体之间,表现出更好的相容性。另外,在复合材料制备中加入酯化木素改性CTMP纤维,使复合材料的剪切黏度表现出一定程度的增加,但总体而言,在复合材料体系中添加酯化木素改性CTMP纤维对其加工性能影响不大。

Abstract:Aliphatic chains were introduced into the macromolecule of soda lignin using aliphatic acyl chlorides as esterification reagents. The data of contact angle showed that the hydrophobicity of esterified lignin (EL) was enhanced as compared to the original lignin. EL was further used as interfacial modifier in poly (butylene succinate) (PBS)-chemi-thermo mechnical pulp (CTMP) fiber composites. As a result, the composites with enhanced mechanical properties were obtained, the tensile, impact and bending strengths were increased by 25.1%, 22.4% and 19.3%, respectively compared with those of the specimen without any treatment when 2% EL (on fiber) (synthesized by palmitoyl chloride, n(—COCl)∶n(—OH)=3∶2) was used. Furthermore, the improved interfacial bonding between treated fibers and matrix was verified by SEM images. The shear viscosity of composite was increased due to the addition of EL at the beginning of processing procedure, but in general, the rheological behaviors of composites were not significantly changed.

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