Abstract
Many achievements have been made on the research of composite polyurethane foams to improve their structure and mechanical properties, and the composite foams have been widely utilized in building insulation and furniture. In this work, rigid polyurethane foams (RPUFs) with the addition of different fillers (nano-SiO2, peanut shell, pine bark) were prepared through the one-step method. The effects of inorganic nano-SiO2 and organic biomass on foam properties were evaluated by means of physical and chemical characterization. The characterization results indicate that the compressive strength values of prepared foams could fully meet the specification requirement for the building insulation materials. The inorganic and organic fillers have no effect on the hydrogen bonding states in composite RPUFs. Furthermore, compared to the biomass fillers, the addition of nano-SiO2 greatly influenced the final residual content of the fabricated foam. All composite foams exhibit closed-cell structure with smaller cell size in comparison with the parent foam. The prepared composite foams have the potential for utilization in building insulation.
Highlights
In order to achieve high-quality development for current society, energy efficiency and green economy have been sustainably developing [1,2,3,4]
The aim of this work was to synthesize the rigid polyurethane foams (RPUFs) composited with inorganic filler
The specific compressive strength density)was was used used in in this this study study for for characterizing characterizing the the compression compression properties properties of the prepared composite forms
Summary
In order to achieve high-quality development for current society, energy efficiency and green economy have been sustainably developing [1,2,3,4]. The construction industry is an important link to sustainable development [5]. The use of environment-friendly materials in modern buildings cannot only greatly reduce construction waste and avoid excessive use of natural resources [6]. The utilization of biomass, especially crop wastes, is an effective way to save energy and protect the environment in the building industry [7,8]. The estimated amounts of tremendous crop wastes in China covered a large scale from 620 to 940 tons every year. The utilization of biomass resources will significantly reduce excessive CO2 emissions [9]. The research on the preparation of bio-based RPUFs or composite RPUFs with the addition of biomass fillers is necessary in future studies
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