碱处理对松木纤维改性的影响

IF 0.5 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
Renan Zunta Raia, S. Iwakiri, R. Trianoski, A. S. D. Andrade, E. L. Kowalski
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引用次数: 6

摘要

本研究的目的是评价碱化不同浓度和时间组合对松木纤维中木质素、半纤维素和纤维素的改性效果,并确定以植物基复合材料为目标的最佳碱化组合。碱化过程采用5种浓度(5、10、15、20和30%)和2次暴露时间(2和24小时)。对处理后的纤维进行了化学分析、纤维素结晶度、热稳定性和表面改性分析。结果表明,纤维素I - II转化降低了结晶度。之后,随着NaOH浓度的增加,热稳定性和表面特性都有所提高。虽然所有处理都改变了纤维的性能,但产生技术增益的条件是5%的浓度和2小时的碱化条件。由此可见,该条件改变了木纤维的大分子结构,改变了表面,处理后的纤维可以作为植物基复合材料的填料。关键词:木质纤维素纤维;碱性化;热稳定性;纤维素结晶度;大分子。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of alkali treatment on modification of the Pinus fibers
The aim of this study was to evaluate the effect of the alkalization with different concentrations and time combination in the modification of lignin, hemicellulose and cellulose in pine fibers and determine the best combination aiming the incorporation in plant-based composites. The alkalization process was conducted with 5 concentrations (5, 10, 15, 20, and 30%) and 2 exposure times (2 and 24 hours). Chemical analysis was performed, and cellulose crystallinity, thermal stability, and surface modification were analyzed for the treated fibers. The results showed that there was a reduction in crystallinity with cellulose I – II transformation. Thereafter, the thermal stability and surface characteristics were increased with the increase of the NaOH concentration. Although all treatments altered the fiber properties, the condition that resulted in technical gain was the condition with 5% concentration and 2 hours of alkalization. Thus, we can conclude that this condition changes the macromolecular structure of the wood fibers, change the surface and the treat fiber could be used as filler to plant-base composite. Keywords: Lignocellulosic fibers; Alkalization; Thermal stability; Cellulose crystallinity; Macromolecules.
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来源期刊
Materia-rio De Janeiro
Materia-rio De Janeiro MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
1.00
自引率
25.00%
发文量
51
审稿时长
6 weeks
期刊介绍: All the articles are submitted to a careful peer-reviewing evaluation process by the journal''s Editorial Board. The Editorial Board, reviewers and authors make use of a web based proprietary automated tool to deal with the reviewing procedures.the Revista Matéria''s article reviewing restricted access system - SEER. Authors are not informed about the identity of the reviewers.
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