Effect of ZnCl₂ Treatment Parameters on the Thermo-Hydrolysis of Recycled MDF for Epoxy Composites.

IF 4.9 3区工程技术 Q1 POLYMER SCIENCE

Polymers Pub Date : 2025-09-15 DOI:10.3390/polym17182493

Çağrı Olgun, Koray Çufa

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引用次数: 0

Abstract

The aim of this study is to determine the hydrothermal recycling of medium-density fiberboard (MDF) wastes using zinc chloride (ZnCl₂) as an acidic catalyst to obtain reinforcing fibers for epoxy-based composites. For this purpose, during the hydrothermal recycling process (110 °C, 0.4 bar), zinc chloride solutions with different concentrations (0% to 30%) were applied at different time intervals (20 to 60 min). The recycled fibers were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope-energy dispersive spectrometry (SEM-EDS), carbon (C) (%), hydrogen (H) (%), and nitrogen (N) (%) contents, and fiber classification. The fibers were added as a filler (1% w/w) to epoxy composites. The compression strength and of the epoxy composites as assessed and differential scanning calorimetry (DSC) characterization was performed. According to the results, nitrogen content decreased with increasing ZnCl₂ concentration. Furthermore, the fine fibers ratios increased with increasing treatment time. The results suggest that recycled fibers can be used as a filler in epoxy composites; however, a long treatment time adversely affects the compression strength of epoxy composites.

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ZnCl2处理参数对环氧复合材料中密度纤维板热水解的影响。

本研究的目的是确定以氯化锌（ZnCl2）为酸性催化剂，水热回收中密度纤维板（MDF）废料，以获得环氧基复合材料的增强纤维。为此，在水热回收过程（110℃，0.4 bar）中，以不同的时间间隔（20 ~ 60 min）施用不同浓度（0% ~ 30%）的氯化锌溶液。采用傅里叶变换红外光谱（FT-IR）、扫描电镜-能谱仪（SEM-EDS）、碳(C)（%）、氢(H)（%）、氮(N)（%）含量和纤维分类对回收纤维进行了表征。将纤维作为填料（1% w/w）添加到环氧复合材料中。评估了环氧复合材料的抗压强度和抗压强度，并进行了差示扫描量热法（DSC）表征。结果表明，氮含量随ZnCl2浓度的增加而降低。细纤维比例随处理时间的延长而增加。结果表明：再生纤维可作为环氧复合材料的填料；但处理时间过长会对环氧复合材料的抗压强度产生不利影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymers POLYMER SCIENCE-

CiteScore

8.00

自引率

16.00%

发文量

4697

审稿时长

1.3 months

期刊介绍： Polymers (ISSN 2073-4360) is an international, open access journal of polymer science. It publishes research papers, short communications and review papers. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Polymers provides an interdisciplinary forum for publishing papers which advance the fields of (i) polymerization methods, (ii) theory, simulation, and modeling, (iii) understanding of new physical phenomena, (iv) advances in characterization techniques, and (v) harnessing of self-assembly and biological strategies for producing complex multifunctional structures.