Journals / JRM / Vol.9, No.3


Research Article

BEST PAPER 2021

Performance of Unidirectional Biocomposite Developed with Piptadeniastrum Africanum Tannin Resin and Urena Lobata Fibers as Reinforcement

Achille Gnassiri Wedaïna1,2, Antonio Pizzi2, Wolfgang Nzie1, Raidandi Danwe3, Noel Konaï4,*, Siham Amirou2, Cesar Segovia5, Raphaël Kueny5
1 Laboratory of Mechanics, Materials, and Modelization (PAI), University of Ngaoundéré, Ngaoundéré, 454, Cameroon
2 Laboratory of Studies and Research on Wood Material (LERMAB), University of Lorraine, Epinal, 88000, France
3 Laboratory of Mechanics, Materials and Building, University of Maroua, Maroua, Cameroon
4 Laboratory of Materials Mechanics, University of Yaoundé 1, Yaoundé, 8390, Cameroon
5 Lorrain Textile Test Center (CETELOR), University of Lorraine, Epinal, 88026, France
* Corresponding Author: Noel Konaï. Email:
(This article belongs to this Special Issue: Renewable and Biosourced Adhesives)

Abstract

The Piptadeniastrum Africanum bark tannin extract was characterized using MALDI TOF, ATR-FT MIR. It was used in the development of a resin with Vachellia nilotica extract as a biohardener. This tannin is consisting of Catechin, Quercetin, Chalcone, Gallocatechin, Epigallocatechin gallate, Epicatechin gallate. The gel time of the resin at natural pH (pH = 5.4) is 660 s and its MOE obtained by thermomechanical analysis is 3909 MPa. The tenacity of Urena lobata fibers were tested, woven into unidirectional mats (UD), and used as reinforcement in the development of biocomposite. The fibers tenacity at 20, 30 and 50 mm lengths are respectively 65.41, 41.04 and 33.86 cN·Tex−1 . The UD biocomposite obtained had very interesting mechanical properties. Its density, tensile MOE, ultimate strength, bending MOE and MOR are respectively 926 kg·m−3 , 6 GPa, 55 MPa, 9.3 GPa and 68.3 MPa. This biocomposite can be used in a building exterior structure.

Keywords

Adhesive; biocomposite; fibers; hardener; MOE and MOR
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