Physicomechanical behavior of agro waste-filled polypropylene composites materials

Bellili, Nadira; Dairi, Badrina; Hammour, Noura; Djidjelli, Hocine; Boukerrou, Amar

doi:10.1016/j.matpr.2021.12.259

Cited by 1 publication

(1 citation statement)

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“…What is also interesting is that it was found that the modification of the husks with the coupling agents also contributed to the acceleration of the gel time. The reason was probably a combination of better filler dispersion and the enhanced compatibilization between the lignocellulosic filler and the synthetic polymer, which was previously described in the case of both acetylated and silanized fillers for composites [48,49]. The values denoted with identical letters do not differ significantly at p = 0.05 according to the post hoc test, following the ANOVA test.…”

Section: Resultsmentioning

confidence: 73%

Modified Buckwheat Husk as a Filler for Urea–Formaldehyde Resin in Plywood Production

Kawalerczyk,

Walkiewicz,

Sedliačik

et al. 2024

Polymers

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The aim of the presented research was to determine the suitability of both non-modified and modified buckwheat husk (BH) as a filler for urea–formaldehyde adhesive in plywood production. The effect of two modification methods, acetylation and silanization, was investigated. Infrared spectroscopy outcomes confirmed that both acetylation and silanization of the filler had occurred. Based on the results, it was found that the introduction of BH had a significant effect on both the adhesive properties and the characteristics of the manufactured plywood. The application of non-modified husks led to a reduction in viscosity and an extension of the gelation time, and the produced plywood boards were characterized by reduced bonding quality and increased delamination. Modification of the husk surface by acetylation and silanization with 3-aminopropyltriethoxysilane contributed to the noticeable improvement in the resin properties. On the other hand, the improvement in plywood properties, consisting of the increase in bonding quality and reduced delamination, was observed only in the case of the silanized husk. Furthermore, the use of non-modified and acetylated husk did not significantly influence the formaldehyde emission. The reduction in the investigated emission of formaldehyde was observed only in the case of variants containing 15 and 20% of silanized buckwheat husk.

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Section: Resultsmentioning

confidence: 73%