Influence of chemical treatments on adhesion properties of hemp fibres

Troëdec, Marianne Le; Rachini, Ali; Peyratout, Claire; Rossignol, Sylvie; Max, Eva; Kaftan, O.; Fery, Andreas; Smith, Agnès

doi:10.1016/j.jcis.2010.12.066

Cited by 76 publications

(43 citation statements)

References 42 publications

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“…This may be due to the nucleating ability of the GCW particle reinforcement for crystallization of oxo-HDPE [17]. For composite type D, NaOH treatment conducted had removed amorphous materials, such as hemicellulose and pectin, supported by FTIR (Figure 1) from the GCW surface [34] and, thus, increased the crystalline components in GCW and resulted in higher composites. Figure 4 depicts the SEM images of untreated and NaOH treated GCW fillers with different treatment time.…”

Section: Tgamentioning

confidence: 99%

Characterization of Alkaline Treatment and Fiber Content on the Physical, Thermal, and Mechanical Properties of Ground Coffee Waste/Oxobiodegradable HDPE Biocomposites

Tan

Kuan

Lee

2017

International Journal of Polymer Science

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Effect of alkali treatment on ground coffee waste/oxobiodegradable HDPE (GCW/oxo-HDPE) composites was evaluated using 5%, 10%, 15%, and 20% volume fraction of GCW. The composites were characterized using structural (Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM)), thermal (thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC)), mechanical (tensile and impact test) properties, and water absorption. FTIR spectrum indicated the eradication of lipids, hemicellulose, lignin, and impurities after the treatments lead to an improvement of the filler/matrix interface adhesion. This is confirmed by SEM results. Degree of crystallinity index was increased by 5% after the treatment. Thermal stability for both untreated and treated GCW composites was alike. Optimum tensile result was achieved when using 10% volume fraction with enhancement of 25% for tensile strength and 24% for tensile modulus compared to untreated composite. Specific tensile strength and modulus had improved as the composite has lower density. The highest impact properties were achieved when using 15% volume fraction that lead to an improvement of 6%. Treated GCW composites show better water resistance with 57% improvement compared to the untreated ones. This lightweight and ecofriendly biocomposite has the potential in packaging, internal automotive parts, lightweight furniture, and other composite engineering applications.

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Section: Tgamentioning

confidence: 99%

Characterization of Alkaline Treatment and Fiber Content on the Physical, Thermal, and Mechanical Properties of Ground Coffee Waste/Oxobiodegradable HDPE Biocomposites

Tan

Kuan

Lee

2017

International Journal of Polymer Science

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“…Treatment experiments were carried out at room temperature under conditions given in [28]. Treatment by EDTA was made by 3 h immersion of hemp hurds sample in a saturated solution of EDTA (5 g l -1 ).…”

Section: Chemical Treatmentmentioning

confidence: 99%

Thermal degradation of natural and treated hemp hurds under air and nitrogen atmosphere

Števulová

Estokova

Cigasova

et al. 2016

J Therm Anal Calorim

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Sustainability goals are essential driving principles for the development of innovative materials in the construction industry. Natural fibers represent an attractive alternative as reinforcing material due to good mechanical properties and sustainability prerequisites. The study has been focused on the comparative investigation of chemical and physical treatments of hemp hurds and their influence on the thermal behavior of main hemp constituents in air and nitrogen atmosphere. Thermal decomposition of hemp hurds involves several parallel reactions related to heat and mass transfer processes. A comparison of DSC and TG/ DTG results of hemp hurds samples before and after treatments demonstrates a better thermal stability for treated samples. It is caused by changes in chemical composition due to a partial removal of non-cellulosic components from hemp hurds structure, an increase in cellulose content and decrease in its degree of polymerization. The results show different thermal behavior of the hurds samples heated under nitrogen and air atmosphere. Based on DTG records, several-stage process of mass loss has been found for the samples under air, whereas only two-stage process under nitrogen.

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“…• C) and need to use aggressive chemical substances [9][10][11]. Next, it is difficult to control the mechanical methods and moreover, its effect has a very strong impact on fiber mechanical properties [12,13].…”

Section: Introductionmentioning

confidence: 99%

Pullout Behavior of Oxygen Plasma Treated Polymer Fibers From Cement Matrix

Trejbal

Horová

Prošek

2017

APP

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Abstract. The aim of this work is to describe bonding properties between surface treated polymer fibers and a cement matrix. In order to increase an interaction between the matrix and fiber surfaces, two fiber types having approx. 0.5 mm in diameter were modified by mean of oxygen plasma treatment.Surface physical changes of treated fibers were examined using SEM morphology observation and interfacial adhesion mechanical tests. The principle of mechanical tests rested on a single fiber pulling out from the matrix (cement paste, CEM I 42.5 R, w/c 0.4). The embedded length was equal to 50 % of original fiber length (50 mm), where the fiber free-end displacement and force resisting to the displacement were monitored.It was pointed out that interfacial shear stress needed to break the bond between the modified fibers and the matrix increased almost by 15-65 % if compared to reference fibers. When the fiber free-end displacement reached to 3.5 mm, the shear strength increased almost twice.

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Influence of chemical treatments on adhesion properties of hemp fibres

Cited by 76 publications

References 42 publications

Characterization of Alkaline Treatment and Fiber Content on the Physical, Thermal, and Mechanical Properties of Ground Coffee Waste/Oxobiodegradable HDPE Biocomposites

Characterization of Alkaline Treatment and Fiber Content on the Physical, Thermal, and Mechanical Properties of Ground Coffee Waste/Oxobiodegradable HDPE Biocomposites

Thermal degradation of natural and treated hemp hurds under air and nitrogen atmosphere

Pullout Behavior of Oxygen Plasma Treated Polymer Fibers From Cement Matrix

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