Modification of granite sawdust with aluminum ester coupling agent and its novel application in high-density polyethylene composite plate

Zhang, Shuai; Zhang, Na; Zhang, Youpeng; Ding, Chong; Zhang, Yihe

doi:10.1016/j.jobe.2023.107364

Journal of Building Engineering

2023

DOI: 10.1016/j.jobe.2023.107364

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Modification of granite sawdust with aluminum ester coupling agent and its novel application in high-density polyethylene composite plate

Shuai Zhang

Na Zhang

Youpeng Zhang

et al.

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2024

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Cited by 2 publications

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Surface modification of spherical silica micro‐powder using silane coupling agents and their application in epoxy resin‐based composite materials

Wang,

Yu,

Wang

et al. 2024

J of Applied Polymer Sci

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In recent years, the packaging industry has utilized electronic packaging materials with epoxy resin (EP) and high‐performance fillers, exhibiting superior mechanical properties and thermal conductivity. Spherical silica micro‐powder (SSP) is a critical thermal conductive filler but faces challenges due to its inorganic nature. Surface modification is essential to improve SSP's compatibility and dispersion in organic matrices for effective use in EP‐based composites. In this paper, the effects of the following four modification methods on SSP/EP composites were studied: (1) the processes include co‐modification with dimethyldimethoxysilane (DMDMS) and trimethylethoxysilane (MTES), (2) modification with NaOH, (3) co‐modification with DMDMS and MTES in an alkaline environment after NaOH modification, and (4) co‐modification with methyltrimethoxysilane (MTMS) and propyltrimethoxysilane (PTMOS). Through comprehensive characterization and evaluation, it is evident that modification schemes 1, 3, and 4 significantly enhance SSP's hydrophobicity, dispersibility, and compatibility with EP. This led to the improvement of thermal conductivity and stability of the composite, and modification scheme 4 showed the highest enhancement, with a 42.6% increase in thermal conductivity. Moreover, the mechanical properties of modified composite materials, such as bending strength, impact resistance, and tensile strength, surpass those of unmodified SSP/EP composite materials. The study provides valuable insights for reducing manufacturing costs and enhancing productivity in the electronic packaging sector.

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Surface modification of spherical silica micro‐powder using silane coupling agents and their application in epoxy resin‐based composite materials

Wang,

Yu,

Wang

et al. 2024

J of Applied Polymer Sci

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Valorisation of the Effect of Waste Aluminum Sawdust on Concrete: Durability Characteristics and Environmental Impacts

DEMİR,

DEMİREL,

ÖZTÜRK

2024

Black Sea Journal of Engineering and Science

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The aim of this study is to examine the effect of replacing waste aluminum sawdust (AS) with fine aggregate on the strength and durability properties of concrete. For this, concrete mixtures with a cement dosage of 400 kg/m3, water/cement (W/C) ratio of 0.40-0.50-0.60 were prepared. Aluminum sawdust obtained from Elazig industrial site was added to the concrete mixtures by replacing 0%, 0.5% and 1% fine aggregate by volume. After curing in the curing pool for 28 days, the produced concrete samples were placed in the carbonation tank and exposed to the accelerated carbonation test in three different time periods as the 1st, 3rd and 7th days. Tests of compressive strength, splitting tensile strength, ultrasound transmission velocity, porosity and carbonation depth were performed on concrete samples before and after carbonation. The samples that were exposed to carbonation were compared with the samples that did not undergo carbonation. In addition, the microstructure of AS concrete was investigated using scanning electron microscopic images (SEM). In the microscopic images, larger cracks, openings and interfacial voids were observed in the concrete matrix with the addition of AS. However, due to the formation of ettringite in these gaps and cracks after carbonation, the cavities became smaller. As a result of the experiments, it was observed that the optimum W/C ratio was 40% and the AS amount was 0.5% in the use of AS in concrete. In addition, it was found that the carbonation effect improves the compressive and splitting tensile strength and increases the ultrasound transmission rate. Finally, life cycle assessment (LCA) was conducted to evaluate the environmental impacts of the prepared concrete samples. Considering the large amount of natural aggregate consumption, it is thought that the use of waste materials in concrete will provide environmental and economic benefits.

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Modification of granite sawdust with aluminum ester coupling agent and its novel application in high-density polyethylene composite plate

Cited by 2 publications

References 37 publications

Surface modification of spherical silica micro‐powder using silane coupling agents and their application in epoxy resin‐based composite materials

Surface modification of spherical silica micro‐powder using silane coupling agents and their application in epoxy resin‐based composite materials

Valorisation of the Effect of Waste Aluminum Sawdust on Concrete: Durability Characteristics and Environmental Impacts

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