Tailoring materials for their need: Sustainable layered double hydroxide polymer composites

Oosthuizen, Hester; Jones, Linda E.; Naseem, Sajid; Labuschagne, F.J.W.J.; Leuteritz, Andreas

doi:10.1002/pol.20230025

Cited by 9 publications

(3 citation statements)

References 61 publications

(349 reference statements)

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“…With increased filler content, thermal stability improves since the fillers serve as heat sinks, dispersing heat and delaying degradation. Furthermore, including fillers reduces polymer chain mobility, resulting in a slower TGA degradation rate 23–25 . Some fillers can encourage char formation, providing a protective layer during breakdown.…”

Section: Introductionmentioning

confidence: 99%

Elaeocarpus ganitrus (rudraksha) seeds as a potential sustainable reinforcement for polymer matrix composites

Irawan,

Siregar,

Cionita

et al. 2024

Polymer Composites

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Creating environmentally friendly materials like polymer matrix composites (PMCs) enhanced with natural fillers has grown in recent decades. It supports the United Nations sustainable development goals (SDGs) by reducing the reliance on non‐renewable resources, minimizing waste generation, and promoting sustainable land and water management practices. This investigation assesses the viability of employing Elaeocarpus ganitrus (rudraksha) seeds as a filler (rudraksha seed filler [RSF] in environmentally sustainable composite materials. Various loading concentrations and sizes of RSFs were incorporated by hand lay‐up into polymer epoxy resin (ER). The effect of filler on the mechanical properties of composites was observed. Thermal properties of RSF/epoxy composites were investigated using thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR). The 10 wt% 100‐mesh filler had the maximum tensile strength (TS) at 42.30 MPa and flexural strength (FS) at 87.4 MPa, surpassing other filler sizes and loading concentrations. Meanwhile, the highest impact properties have been achieved with 20 wt% of RSF with 0.436 J. The results of this study highlight the significant impact of filler type and concentration on the mechanical properties of the material. These findings offer valuable insights that may be applied to various industrial contexts. Furthermore, incorporating 10% up to 30 wt% RSF in epoxy composites has brought more thermal stability than virgin epoxy. It revealed that the RSFs possess higher decomposition temperatures than the epoxy matrix. RSF has a potential sustainable reinforcement in polymer composites and holds great promise for addressing environmental challenges and aligning with several SDGs.Highlights Interest in eco‐friendly materials, like polymer composites with natural reinforcements, has been increasing in recent decades. Rudraksha sees filler is lightweight with low moisture, high carbon content, and some mineral elements. The addition of Rudraksha seed filler has enhanced the tensile, flexural, and impact properties of the composites. Rudraksha seed filler possess higher decomposition temperatures than the epoxy matrix. Rudraksha seed filler has a promising future as a sustainable friction material for automotive brake pads.

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Section: Introductionmentioning

confidence: 99%

Elaeocarpus ganitrus (rudraksha) seeds as a potential sustainable reinforcement for polymer matrix composites

Irawan,

Siregar,

Cionita

et al. 2024

Polymer Composites

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“…Modified double‐layered hydroxides were previously studied. [ 32–34 ] Calcined hydrotalcite (CHT) is used as a solid base in heterogeneous catalysis, [ 35,36 ] but no previous use of this material as an additive to polymers has been found.…”

Section: Introductionmentioning

confidence: 99%

In‐Depth Analysis of the Complex Interactions Induced by Nanolayered Additives in PHBV Nanocomposites

Martínez‐Rubio,

Avilés,

Pamies

et al. 2024

Macro Materials & Eng

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New nanocomposites based on biopolymer poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV) are processed via extrusion, using low content of calcined hydrotalcite (CHT) and cloisite 20A (C20A) as additives (3 wt%). The aim of this work is to characterize the thermal and viscoelastic response of the structures induced by the presence of the additives. Field‐emission scanning electron microscopy and laser profilometry are utilized to analyze the effect of the additives on the surface finish of extrusion filaments, detecting a smoother surface induced by additives. A lower degradation temperature is observed via thermogravimetry for composite containing CHT (PHBV+3%CHT), while such a phenomenon is not present in composite with C20A (PHBV+3%C20A). An increase in crystallinity due to the nucleating effect of additives is measured via differential scanning calorimetry. The intercalation of the biopolymer in the layered structure of the additives is observed via X‐ray diffraction, reflecting the effective interaction in the composite matrix. The viscoelastic behavior of the samples is evaluated by means of rheology and dynamic‐mechanical analysis, showing a non‐Newtonian behavior and an enhancement of the vitreous state response. All results converge to the conclusion that the incorporation of the additives induces the formation of long‐term structures that present variable sensitivity to temperature and frequency.

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“…A way to eliminate the above-mentioned shortcomings can be a photoprotective additive combining the advantages related to the high efficiency of UV-absorbing molecules with the advantages of inorganic particles without negatively affecting the properties of the paint material. Such a photoprotective additive can be, for example, a layered double hydroxide (LDH) intercalated with a suitable organic UV absorber [3][4][5]. LDH may be represented by a general formula [M II (1−x) M III x (OH) 2 ][x/nA n− ]•mH 2 O, where M II and M III are divalent and trivalent cations, respectively, and A n− represents exchangeable anions of charge n which compensates the positive charge induced by the presence of M III in the layers.…”

Section: Introductionmentioning

confidence: 99%

Functionalization of ZnAl-Layered Double Hydroxide with Ensulizole and Its Application as a UV-Protective Agent in a Transparent Polymer Coating

Melánová,

Kopecká,

Beneš

et al. 2023

Molecules

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In this study, we propose a promising photoprotective additive that combines the advantages of both organic UV absorbers and inorganic particles without compromising the properties of the paint material. This additive involves the intercalation of a well-known organic UV absorber, 2-phenylbenzimidazole-5-sulfonic acid (PBISA), into zinc-aluminum layered double hydroxide (ZnAl-LDH). Three ZnAl-LDH intercalates with PBISA were prepared using various methods based on either anion exchange or direct synthesis. The intercalates were characterized using powder X-ray diffraction, thermogravimetry, elemental analysis, and IR and UV-Vis spectroscopies. The composition and basal spacings of all three intercalates are very similar. An effective UV protection film was prepared when the ZnAl–PBISA–1 intercalate was incorporated into polyurethane-acrylate lacquer. The resultant UV protective film exhibited stability and uniform distribution of the intercalated fillers. Some minimal particle sedimentation and aggregation were observed on the cured film’s underside, but did not compromise the films’ UV protective properties. The prepared lacquers with intercalated fillers offer a viable solution for the surface modification of plastic products.

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Tailoring materials for their need: Sustainable layered double hydroxide polymer composites

Cited by 9 publications

References 61 publications

Elaeocarpus ganitrus (rudraksha) seeds as a potential sustainable reinforcement for polymer matrix composites

Elaeocarpus ganitrus (rudraksha) seeds as a potential sustainable reinforcement for polymer matrix composites

In‐Depth Analysis of the Complex Interactions Induced by Nanolayered Additives in PHBV Nanocomposites

Functionalization of ZnAl-Layered Double Hydroxide with Ensulizole and Its Application as a UV-Protective Agent in a Transparent Polymer Coating

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