Thermal insulation using biodegradable poly(lactic acid)/date pit composites

Barkhad, Mohamed Saeed; Abu-Jdayil, Basim; Iqbal, Muhammad; Mourad, Abdel‐Hamid I.

doi:10.1016/j.conbuildmat.2020.120533

Cited by 41 publications

(19 citation statements)

References 53 publications

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“…According to some investigations, the thermal conductivity value of PLA ranges, approximately, from 0.064–0.23 W/mK 53–56 . In this study, we report a value of 0.111 W / mK, within the reported range.…”

Section: Resultssupporting

confidence: 87%

Additive manufacturing of green composites: Poly (lactic acid) reinforced with keratin materials obtained from Angora rabbit hair

Flores-Hernández

Velasco‐Santos

Rivera‐Armenta

et al. 2020

J of Applied Polymer Sci

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In this research, additive manufacturing of polylactic acid (PLA) reinforced with keratin was studied. Keratin was obtained from Angora rabbit hair and modified with NaOH. Scanning electron microscopy (SEM) images showed that the modified surfaces were rougher than untreated surfaces. Furthermore, SEM images in the composites' fracture regions showed surface changes, associated with the nature of the reinforcement. Likewise, thermomechanical properties of the composites were attributed to the nature of the reinforcement and the type of keratin. Besides, the 3D printed composites showed higher thermal conductivity values than PLA with the addition of keratin. Cytotoxicity tests revealed an improvement in cell growth compared to the control and PLA. These results are meaningful toward the development of high thermal conductors and biocompatible composites with applications in different fields, where the use of only natural polymers is necessary.

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Section: Resultssupporting

confidence: 87%

Additive manufacturing of green composites: Poly (lactic acid) reinforced with keratin materials obtained from Angora rabbit hair

Flores-Hernández

Velasco‐Santos

Rivera‐Armenta

et al. 2020

J of Applied Polymer Sci

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“…Some research works have focused on using DSF as a filler to develop biocomposites. [4,[12][13][14][15][16][17][18][19] This type of natural filler has served mainly in different applications as a flameretardant material or for the development of new bio-based thermal insulating materials. Moustafa et al [16] conducted a study on DSF as a flame-retardant filler in the polyamide-6 matrix because of not only the emission of huge species (gaseous products) during its combustion such as H 2 O and CO 2 but also the presence of mineral oxides such as SiO 2 and Fe 2 O 3 .…”

Section: Introductionmentioning

confidence: 99%

“…Moustafa et al [16] conducted a study on DSF as a flame-retardant filler in the polyamide-6 matrix because of not only the emission of huge species (gaseous products) during its combustion such as H 2 O and CO 2 but also the presence of mineral oxides such as SiO 2 and Fe 2 O 3 . On the other hand, Barkhad et al [17] developed a novel biocomposite using biodegradable poly(lactic acid) (PLA) and DSF as the building insulation material, they recommended the use of these biocomposites in the handles of kitchen utensils and other materials that require thermal insulation. A study of the mechanical behavior of thermoplastic polystyrene (PS) composites containing chemical treated DSF was carried out by Hittini et al,, [18] the biocomposites were fabricated as thermally insulating materials for use in the construction industry, whereas the experimental results revealed that the increase in DSF content to the PS matrix decreased the compressive, tensile, and flexural strengths and moduli of the biocomposites.…”

Section: Introductionmentioning

confidence: 99%

Green epoxy resin/date stone flour biocomposites: Effect of filler chemical treatments on elastic properties

et al. 2021

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This work aims to study the effect of chemical treatments of date stone flour (DSF) as a filler on the elastic properties of biocomposites based on green epoxy resin (GER) used as a matrix. The main disadvantages of natural reinforcements in biocomposites are the poor compatibility between the reinforcement and the matrix as well as the relatively high moisture sorption. Different chemical treatments using soda (alkaline), benzoyl chloride, and potassium permanganate were applied to the DSF filler. Then, the filler was incorporated into the matrix at 30 wt % to obtain GER/DSF biocomposites. The elastic properties of the biocomposites, namely, longitudinal modulus, shear modulus, bulk modulus, Young's modulus of elasticity, acoustic impedance, Poisson's ratio, and ultrasonic microhardness, were determined using ultrasonic through-transmission method. In addition, the morphology was studied using microscopy analysis. The results obtained revealed a decrease of the elastic properties of the pretreated-filler biocomposite compared to the pure GER. On the other hand, the chemical treatment of the filler leads to an improvement of the elastic properties of GER/DSF biocomposites. The permanganate treatment is the most suitable for GER/DSF biocomposites. The morphology analysis through optical microscopy and scanning electron microscopy showed that chemical treatments enhance the interfacial adhesion between the DSF filler and the GER matrix.

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“…PLA composites are renewable in nature, economical, biodegradable, and compatible with most of the manufacturing processes for structural applications. Because of their thermal insulation, green blends of PLA/date pits powder find application in building construction, thus improving the thermal management with respect to buildings and allowing the partial replacement of concrete used in a typical building wall ( Figure 11 ) [ 168 ]. Epoxy coated PLA is also targeting to replace river sand in concrete in walls [ 169 ].…”

Section: Pla Applicationsmentioning

confidence: 99%

Section: Figures Schemes and Tablesmentioning

confidence: 99%

Poly(lactic Acid): A Versatile Biobased Polymer for the Future with Multifunctional Properties—From Monomer Synthesis, Polymerization Techniques and Molecular Weight Increase to PLA Applications

et al. 2021

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Environmental problems, such as global warming and plastic pollution have forced researchers to investigate alternatives for conventional plastics. Poly(lactic acid) (PLA), one of the well-known eco-friendly biodegradables and biobased polyesters, has been studied extensively and is considered to be a promising substitute to petroleum-based polymers. This review gives an inclusive overview of the current research of lactic acid and lactide dimer techniques along with the production of PLA from its monomers. Melt polycondensation as well as ring opening polymerization techniques are discussed, and the effect of various catalysts and polymerization conditions is thoroughly presented. Reaction mechanisms are also reviewed. However, due to the competitive decomposition reactions, in the most cases low or medium molecular weight (MW) of PLA, not exceeding 20,000–50,000 g/mol, are prepared. For this reason, additional procedures such as solid state polycondensation (SSP) and chain extension (CE) reaching MW ranging from 80,000 up to 250,000 g/mol are extensively investigated here. Lastly, numerous practical applications of PLA in various fields of industry, technical challenges and limitations of PLA use as well as its future perspectives are also reported in this review.

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Thermal insulation using biodegradable poly(lactic acid)/date pit composites

Cited by 41 publications

References 53 publications

Additive manufacturing of green composites: Poly (lactic acid) reinforced with keratin materials obtained from Angora rabbit hair

Additive manufacturing of green composites: Poly (lactic acid) reinforced with keratin materials obtained from Angora rabbit hair

Green epoxy resin/date stone flour biocomposites: Effect of filler chemical treatments on elastic properties

Poly(lactic Acid): A Versatile Biobased Polymer for the Future with Multifunctional Properties—From Monomer Synthesis, Polymerization Techniques and Molecular Weight Increase to PLA Applications

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