The possibility of vermiculite, sunflower stalk and wheat stalk using for thermal insulation material production

Binici, Hanifi; Aksoğan, Orhan; Dincer, Aytac; Luga, Erion; Eken, Mustafa; Isikaltun, Ozge

doi:10.1016/j.tsep.2020.100567

Cited by 28 publications

(19 citation statements)

References 38 publications

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“…These results show that the ramie fiber hybridization provides better thermal conductivity when used with oil palm wood particles. A similar tendency was also reported in a previous study [ 59 , 60 ].…”

Section: Resultssupporting

confidence: 92%

Characterization of Thermal Bio-Insulation Materials Based on Oil Palm Wood: The Effect of Hybridization and Particle Size

et al. 2021

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Oil palm wood is the primary biomass waste produced from plantations, comprising up to 70% of the volume of trunks. It has been used in non-structural materials, such as plywood, lumber, and particleboard. However, one aspect has not been disclosed, namely, its use in thermal insulation materials. In this study, we investigated the thermal conductivity and the mechanical and physical properties of bio-insulation materials based on oil palm wood. The effects of hybridization and particle size on the properties of the panels were also evaluated. Oil palm wood and ramie were applied as reinforcements, and tapioca starch was applied as a bio-binder. Panels were prepared using a hot press at a temperature of 150 °C and constant pressure of 9.8 MPa. Thermal conductivity, bending strength, water absorption, dimensional stability, and thermogravimetric tests were performed to evaluate the properties of the panels. The results show that hybridization and particle size significantly affected the properties of the panels. The density and thermal conductivity of the panels were in the ranges of 0.66–0.79 g/cm3 and 0.067–0.154 W/mK, respectively. The least thermal conductivity, i.e., 0.067 W/mK, was obtained for the hybrid panels with coarse particles at density 0.66 g/cm3. The lowest water absorption (54.75%) and thickness swelling (18.18%) were found in the hybrid panels with fine particles. The observed mechanical properties were a bending strength of 11.49–18.15 MPa and a modulus of elasticity of 1864–3093 MPa. Thermogravimetric analysis showed that hybrid panels had better thermal stability than pure panels. Overall, the hybrid panels manufactured with a coarse particle size exhibited better thermal resistance and mechanical properties than did other panels. Our results show that oil palm wood wastes are a promising candidate for thermal insulation materials.

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Section: Resultssupporting

confidence: 92%

Characterization of Thermal Bio-Insulation Materials Based on Oil Palm Wood: The Effect of Hybridization and Particle Size

et al. 2021

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“…The relationship between thermal conductivity coefficient and density for these two types of fibers are slightly different from the results of the study which states that the density and coefficient of thermal conductivity are directly proportional [5]. This is because the value of density and coefficient of thermal conductivity is also influenced by the amount of binder and the type of binder used [7], [16]. The results of concrete panels yield with the highest coefficient of thermal conductivity use high amount of plaster binder, which is 500g.…”

Section: The Relationship Between Thermal Conductivity Coefficient and Densitycontrasting

confidence: 56%

“…The research methodology briefly lists the procedures to analyze the concrete panels yields from three different types of natural fibers, wheat, date palm and hemp fibers that have the lowest coefficient of thermal conductivity, below 0.01 W/mK to be considered as thermal insulation materials [7]. The relationship between density and thermal conductivity coefficient also be discussed.…”

Section: Materials and Methodologymentioning

confidence: 99%

“…However, the use of synthetic insulating materials in the market nowadays like fiberglass can lead to lung cancer [7]. The previous research found that synthetic thermal insulation has destructive impact on air, water quality and human health especially those with breathing disorders [8].…”

Section: Abstract: Thermal Conductivity Coefficient Natural Fibres Concrete Panel Yieldsmentioning

confidence: 99%

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Comparison of Thermal Insulation Concrete Panel Yield Based on Natural Fibres: A Review

Rosli

Rahman

2021

JAITA

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Over time, many researchers have conducted studies to investigate the construction sector by assessing those related to energy, environmental and economic problems to find ways to improve global sustainability. The studies on the use of natural fibers: wheat, date palm and hemp as an insulating material in concrete panel yields have been conducted through ten previous research studies. In the market, there are various types of thermal insulation materials but these materials are sold at high prices and even worse some of them contain harmful chemicals that can threaten the health of consumers. This study is intended to identify ten previous research studies on the use of natural fibers in concrete panel yield as thermal insulation materials. Also, to analyse the data of density and coefficient of thermal conductivity accumulated through Microsoft Excel and propose the best concrete panels yield between these three types of natural fibers. The research was based on the value of density and coefficient of thermal conductivity of concrete panel yield. The results reveal that the presence of natural fibers in concrete panels can insulate heat well. The lowest thermal conductivity coefficient obtained from concrete of Hemp Fibre Gypsum (HG) with 0.051 W/mK. The composition of 35g of hemp fiber, 200g of gypsum and 130ml of water has shown that the amount of fibre and binder used plays an important role in determining the value of density and thermal conductivity. Finally, based on the analysis that has been conducted, found that density and thermal conductivity are inversely proportional when there is a change in the composition of fibers and binders in the concrete panel yields.

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“…Mainly, they are left behind in the elds to rot or burned in the elds that are associated with environmental risks [26]. In Turkey, around 2.5 million tons of waste per year in the form of sun ower stalks are produced [27], and this biomass can be an abundant and renewable resource for soluble sugar, especially xylose. The previous study indicated that xylan obtained from sun ower stalk has a more linear structure than softwood xylan and consists of primarily xylose units (> 90%) [28].…”

Section: Introductionmentioning

confidence: 99%

Xylose Release From Sunflower Stalk by Coupling Autohydrolysis and Enzymatic Post-Hydrolysis

HALICI-DEMİR

Akpınar

2021

Preprint

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The purpose of this study was to obtain xylose-based fermentation media from autohydrolysis liquors of sunflower stalk by using commercial xylanase formulation. Xylose is generally produced from xylan by diluted acid hydrolysis that causes the formation of some unwanted compounds during the process. As an alternative to dilute acid hydrolysis method, enzymatic hydrolysis of xylan can provide more specific hydrolysis under moderate conditions and does not cause the formation of undesirable compounds. In this study, xylose production carried out with Trichoderma longibrachiatum xylanase on solubilized xylan form of sunflower stalk, which was hydrothermally pretreated for 1 hour at 160ºC. The effects of substrate concentration and enzyme activity were investigated for the production of xylose. To obtain a high xylose yield and selectivity, the optimization study was conducted by the response surface methodology. The optimum substrate concentration and enzyme activity were found as 60 mg ds/mL CAL and 234 U/mL, respectively. Under the optimum condition, xylose yield and selectivity were found to be 69.5% and 8.2 g/g, respectively. This study showed that xylose could be produce with a high yield without requiring a neutralization process and corrosive chemical reagent apart from water.

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The possibility of vermiculite, sunflower stalk and wheat stalk using for thermal insulation material production

Cited by 28 publications

References 38 publications

Characterization of Thermal Bio-Insulation Materials Based on Oil Palm Wood: The Effect of Hybridization and Particle Size

Characterization of Thermal Bio-Insulation Materials Based on Oil Palm Wood: The Effect of Hybridization and Particle Size

Comparison of Thermal Insulation Concrete Panel Yield Based on Natural Fibres: A Review

Xylose Release From Sunflower Stalk by Coupling Autohydrolysis and Enzymatic Post-Hydrolysis

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