Interfaces in Natural Fibre Composites: Effect of Surface Energy and Physical Adhesion

Fuentes, C.A.; Tran, Le Quan Ngoc; Dupont‐Gillain, Christine C.; Vuure, Aart Willem Van; Verpoest, Ignace

doi:10.1166/jbmb.2012.1227

Cited by 5 publications

(4 citation statements)

References 16 publications

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“…as reinforcing element for composite materials due to their renewable nature and excellent mechanical properties [1,2]. These properties depend mainly on the structure and chemical composition of the fibre.…”

Section: Introductionmentioning

confidence: 99%

Effect of humidity during manufacturing on the interfacial strength of non-pre-dried flax fibre/unsaturated polyester composites

Fuentes

Ting

Dupont‐Gillain

et al. 2016

Composites Part A: Applied Science and Manufacturing

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The influence of moisture content in the environment during manufacture of a novel cobalt-free UP matrix reinforced with flax fibres, on the fibre-matrix adhesion was studied. Flax surface energy was experimentally determined by measuring contact angles on technical fibres, using the Wilhelmy technique and the acid-base theory. The mechanical strength of the interface under different humidity conditions was characterized by the critical local value of interfacial shear stress, τ d , at the moment of crack initiation, which was assessed by single-fibre pull-out tests. Differential scanning calorimetry and x-ray photoelectron spectroscopy analysis gave further insight into the topic. The results suggest that the effect of humidity during manufacturing on the composite interface might be limited. However, longitudinal composite strength decreased somewhat for composites produced in humid conditions, showing that there is some detrimental effect of high levels of moisture during cure on the fibre mechanical performance, likely caused by some fibre degradation.

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Section: Introductionmentioning

confidence: 99%

Effect of humidity during manufacturing on the interfacial strength of non-pre-dried flax fibre/unsaturated polyester composites

Fuentes

Ting

Dupont‐Gillain

et al. 2016

Composites Part A: Applied Science and Manufacturing

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“…It is important to find mechanisms that will improve the stability of soils and natural fibers [7][8][9][10][11][12] (which are usually by-products of mainly plants or animals) are a potentially significant resource. Natural fibers can be used as reinforcement in eco-friendly composites suitable for the building industry and these fibers have been tested as reinforcement in cement [13], polymer matrix composites [14][15][16] and also, to varying degrees, as reinforcing materials in order to improve the engineering properties of different types of soil [17].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of the Fiber Type in Polymer Matrix/Fiber Bond Using Natural Organic Polymer Stabilizer

2014

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This research study compares the effect of polypropylene and wool fibers on the mechanical properties of natural polymer based stabilized soils. Biocomposites are becoming increasingly prevalent and this growth is expected to continue within a number of sectors including building materials. The aim of this study was to investigate the influence of different fiber reinforced natural polymer stabilized soils with regards to mechanical properties and fiber adhesion characteristics. The polymer includes alginate, which is used in a wide range of applications but has not been commonly used within engineering and construction applications. In recent years, natural fibers have started to be used as an ecological friendly alternative for soil reinforcement within a variety of construction applications. Test results in this study have compared the effects of adding natural and synthetic fibers to clay soils and discussed the importance of an optimum soil specification. A correlation between the micro structural analysis using scanning electron microscope (SEM), fiber typology, fiber-matrix bonds and the mechanical properties of the stabilized soils is also discussed.

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“…FS is soil extracted in Syracuse (South Italy, Sicily) that is distinguished by a simple extraction technique and a low transport cost. The Atteberg Limits of FS [31] are shown in Table 2. The clay contained in FS is kaolinite (Al 2 Si2O 5 (OH) 4 ) a silicate mineral with one tetrahedral sheet of silica (SiO 4 ) linked through oxygen atoms to one octahedral sheet of alumina (AlO 6 ) octahedra.…”

Section: Materials and Samples Preparationmentioning

confidence: 99%

“…As they stated, unfired clay bricks reinforced with sheep wool are suitable to improve the thermal efficiency of housing envelopment. In this study, with the aim of adding information about an eco-friendly material suitable for passive design strategies (i.e., methods and devices incorporated into the building to improve heat transfer and storage, increasing its energy efficiency [30,31], thermal tests were carried out on raw-earth samples reinforced with low-quality sheep wool fibre (SWF).…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance, Microstructure Analysis and Strength Characterisation of Agro-Waste Reinforced Soil Materials

et al. 2023

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The use of raw-earth materials reinforced by natural fibres, i.e., livestock waste in the form of greasy wool, represents an eco-friendly alternative for a variety of construction applications. This proposal is based on the analysis of unfired adobe blocks stabilised with wool fibres for use as both structural and non-structural building materials. The influence of fibre length on the thermophysical and mechanical properties of the tested material was investigated. The thermal conductivity coefficient (λ) of raw-earth samples was assessed by following three different test setting procedures (T = 20 °C, and HR at 30%, 50%, and 70%), with the aim to evaluate the effects of different fibre lengths in the raw-earth mix. Samples reinforced by fibres 20 mm in length exhibited the lowest thermal conductivity coefficient (λ = 0.719 W/mK) obtained by a test reproducing typical indoor conditions within the Mediterranean area, i.e., T = 20 °C, and HR 50%. The best mechanical performance was exhibited by samples reinforced by fibres 40 mm in length, with a flexural and compression strength of 0.88 MPa and 2.97 MPa, respectively. The microstructure of these biocomposites was also examined with a scanning electron microscope (SEM) and an energy dispersive X-ray (EDX) to qualitatively evaluate the variation of thermal and mechanical properties due to the different adhesion among the fibres and the soil. The experimental data show good efficiency and a significant improvement in the behaviour of these materials compared to the control samples. The evaluation of the results, with the length of the fibres being the only variable of the analysed samples, allowed for the identification of the mix suitable for the best mechanical and thermal performances, depending on the final use of the material.

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Interfaces in Natural Fibre Composites: Effect of Surface Energy and Physical Adhesion

Cited by 5 publications

References 16 publications

Effect of humidity during manufacturing on the interfacial strength of non-pre-dried flax fibre/unsaturated polyester composites

Effect of humidity during manufacturing on the interfacial strength of non-pre-dried flax fibre/unsaturated polyester composites

Analysis of the Influence of the Fiber Type in Polymer Matrix/Fiber Bond Using Natural Organic Polymer Stabilizer

Thermal Performance, Microstructure Analysis and Strength Characterisation of Agro-Waste Reinforced Soil Materials

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