夏威夷果渣作为环保蓖麻多元醇基聚氨酯泡沫填料的再开发

IF 2.7 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Journal of Material Cycles and Waste Management Pub Date : 2023-05-18 DOI:10.1007/s10163-023-01693-w
Lana S. Maia, Lorena C. S. Balieiro, Ericson J. O. Teixeira, Luciano M. Rodrigues, Derval S. Rosa, Daniella R. Mulinari
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引用次数: 1

摘要

木质纤维素纤维作为聚合物基体的填料已引起了科学界和工业界的兴趣。在巴西,高夏威夷果消费量产生了大量不正确排放的残留物。因此,研究了夏威夷果渣(MR)作为填充剂在不同粒径(28目和35目)和填充剂含量(5-20%wt)的蓖麻油基聚氨酯(PU)泡沫中的再价值。采用傅里叶变换红外光谱(FTIR)、光学显微镜(OM)、扫描电镜(SEM)、表观密度、接触角、水吸附实验、x射线衍射分析(XRD)、热重法(TGA)和力学测试对MR、纯PU及其生物复合材料进行了表征。与纯PU相比,MR在PU基体中的插入提供了成核效应,产生了更大密度的泡沫和更小的孔径。MR含量较高的标本被突出显示。这些生物复合材料具有良好的疏水性、低透水性和MR/PU之间的强相互作用,从而使生物复合材料具有良好的热稳定性和抗压强度。在统计研究中,观察到不同MR尺寸诱导小孔隙形成的统计学差异。最大颗粒(28目)具有较好的力学性能。因此,MR作为PU泡沫中的填充物是一种可持续发展的替代材料,具有多种应用。
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Revalorization of Macadamia nutshell residue as a filler in eco-friendly castor polyol-based polyurethane foam

The use of lignocellulosic fibers as fillers in polymer matrices has aroused the interest of the scientific community and industrial sectors. In Brazil, the high macadamia consumption has generated a significant amount of residues that are incorrectly discharged. Thus, the revalorization of macadamia residues (MR) as filler in castor oil-based polyurethane (PU) foams with different particle sizes (28 and 35 mesh) and filler contents (5–20%wt) was evaluated. The MR, neat PU, and their biocomposites were characterized by Spectroscopy Fourier-transform infrared spectroscopy (FTIR), Optical microscopy (OM), Scanning electron microscopy (SEM), apparent density, contact angle, water adsorption experiments, X-Ray diffraction analysis (XRD), Thermogravimetry (TGA), and mechanical tests. The insertion of MR in the PU matrix provided a nucleating effect producing greater density foams and smaller pore sizes compared to neat PU. Specimens of higher MR contents were highlighted. These biocomposites presented a good hydrophobic character, a low water permeation, and a strong interaction between MR/PU, resulting in biocomposites of good thermal stability and compressive strength. Regarding the statistical study, it was observed that the different MR sizes induced the formation of small pores statistically distinct. Besides, the largest particle (28 mesh) provided better mechanical performance. Therefore, MR as filler in PU foams is a sustainable alternative for the development of materials with several applications.

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来源期刊
CiteScore
5.30
自引率
16.10%
发文量
205
审稿时长
4.8 months
期刊介绍: The Journal of Material Cycles and Waste Management has a twofold focus: research in technical, political, and environmental problems of material cycles and waste management; and information that contributes to the development of an interdisciplinary science of material cycles and waste management. Its aim is to develop solutions and prescriptions for material cycles. The journal publishes original articles, reviews, and invited papers from a wide range of disciplines related to material cycles and waste management. The journal is published in cooperation with the Japan Society of Material Cycles and Waste Management (JSMCWM) and the Korea Society of Waste Management (KSWM).
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