香草基苯并恶嗪和硅烷表面改性短切玄武岩纤维的全绿色复合材料的力学和热性能

IF 1.8 4区 化学 Q3 POLYMER SCIENCE High Performance Polymers Pub Date : 2022-11-28 DOI:10.1177/09540083221143688
M. Derradji, Karim Khiari, Oussama Mehelli, S. Abdous, Abdelmalek Habes, Noureddine Ramdani, Abdeljalil Zegaoui, Wen-ben Liu, A. Daham
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引用次数: 3

摘要

遵循绿色化学的规律,从一种可再生的、生态友好的资源——香兰素中开发出一种新型的复合材料。后者被用作微波合成生物基苯并恶嗪树脂(Va-BZ)的酚类前体。然后,通过用不同量的短切硅烷表面改性玄武岩纤维(BFs)增强Va-BZ,制备了高性能的绿色复合材料。通过1H NMR和FTIR光谱证实了Va-BZ单体的化学结构。通过FTIR和TGA分析评估了硅烷部分在BFs表面的接枝。通过DSC分析证实了Va-BZ单体的自催化开环聚合。通过弯曲和拉伸研究,对所开发的绿色复合材料的力学性能进行了研究。研究结果表明,最大量的20wt.BFs提供了最好的结果,弯曲强度和拉伸强度分别为447和460MPa。利用扫描电镜对断裂的拉伸表面进行了研究,阐明了其增韧机理。同时,TGA表明,BFs的引入显著提高了苯并恶嗪基体的热稳定性。最后,对伽马射线屏蔽效果进行了研究,揭示了BFs的高屏蔽作用。例如,1cm厚的Va-BZ聚合物仅显示出6%的伽马射线屏蔽率,对于由20wt.%的处理过的BFs制成的复合材料,后者提高到18.4%。总的来说,这项研究证实,更环保的方法也可以产生满足紧急应用需求的高性能复合材料。
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Mechanical and thermal properties of fully green composites from vanillin-based benzoxazine and silane surface modified chopped basalt fibers
By following the rules of green chemistry, a novel composite is developed from a renewable and ecofriendly resource, namely the vanillin. The latter was used as a phenolic precursor for the microwave synthesis of a bio-based benzoxazine resin (Va-BZ). Afterwards, high performance green composites were developed by reinforcing the Va-BZ with various amounts of chopped silane surface modified basalt fibers (BFs). The chemical structure of the Va-BZ monomers was confirmed by 1H NMR and FTIR spectroscopy. The grafting of the silane moiety on the BFs surface was assessed by FTIR and TGA analyses. The autocatalytic ring opening polymerization of the Va-BZ monomers was confirmed by DSC analysis. The mechanical performances of the developed green composites were studied by flexural and tensile investigations. The findings suggested that the maximum amount of 20 wt. BFs afforded the best results, with flexural and tensile strengths of 447 and 460 MPa, respectively. The SEM was used to study the fractured tensile surfaces and elucidated the toughening mechanism. Meanwhile, the TGA showed that the introduction of the BFs markedly improved the thermal stability of the benzoxazine matrix. Finally, the gamma rays shielding effectiveness was studied and revealed the highly benefic role of the BFs. For instance, a 1 cm thick Va-BZ polymer only showed a 6% gamma rays screening ratio, the latter was improved to 18.4% for the composite made of 20 wt.% of treated BFs. Overall, this study confirmed that greener approaches can also result in high performance composite satisfying the needs of exigent applications.
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来源期刊
High Performance Polymers
High Performance Polymers 化学-高分子科学
CiteScore
4.20
自引率
14.30%
发文量
106
审稿时长
1.2 months
期刊介绍: Health Services Management Research (HSMR) is an authoritative international peer-reviewed journal which publishes theoretically and empirically rigorous research on questions of enduring interest to health-care organizations and systems throughout the world. Examining the real issues confronting health services management, it provides an independent view and cutting edge evidence-based research to guide policy-making and management decision-making. HSMR aims to be a forum serving an international community of academics and researchers on the one hand and healthcare managers, executives, policymakers and clinicians and all health professionals on the other. HSMR wants to make a substantial contribution to both research and managerial practice, with particular emphasis placed on publishing studies which offer actionable findings and on promoting knowledge mobilisation toward theoretical advances. All papers are expected to be of interest and relevance to an international audience. HSMR aims at enhance communication between academics and practitioners concerned with developing, implementing, and analysing health management issues, reforms and innovations primarily in European health systems and in all countries with developed health systems. Papers can report research undertaken in a single country, but they need to locate and explain their findings in an international context, and in international literature.
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