The influence of chemical surface modification on the performance of sisal‐polyester biocomposites

Gudi, Ravindra D.; Misra, Manjusri; Tripathy, S. S.; Nayak, Sanjay K.; Mohanty, Amar K.

doi:10.1002/pc.10422

Cited by 117 publications

(82 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, mercerization or more general alkali treatment had a lasting effect on the mechanical behavior of flax fibers, especially on fiber strength and stiffness (Gassan and Bledzki 1999). Several other studies were conducted on alkali treatment (Mishra et al 2002;Joseph et al 2000;Sreekala et al 2000). They reported that mercerization led to the increase in the amount of amorphous cellulose at the expense of crystalline cellulose and the removal of hydrogen bonding in the network structure.…”

Section: Surface Chemical Modifications Of Natural Fibersmentioning

confidence: 99%

“…The elongation at break of the composites with chemically modified fiber was attributed to the changes in the chemical structure and bondability of the fiber. Alkali treated (5%) sisal-polyester biocomposite showed about 22% increase in tensile strength (Mishra et al 2002). Ichazo et al (2001) found that adding silanetreated wood flour to PP produced a sustained increase in the tensile modulus and tensile strength of the composite.…”

Section: Mechanical Properties Of Compositesmentioning

confidence: 99%

See 1 more Smart Citation

Pre-treatment of Flax Fibers for use in Rotationally Molded Biocomposites

Wang

Panigrahi²,

Tabil³

et al. 2007

Journal of Reinforced Plastics and Composites

263

118

View full text Add to dashboard Cite

Flax fibers can be used as environmentally friendly alternatives to conventional reinforcing fibers (e.g., glass) in composites. The interest in natural fiber-reinforced polymer composites is growing rapidly due to its high performance in terms of mechanical properties, significant processing advantages, excellent chemical resistance, low cost and low density. These advantages place natural fiber composites among the high performance composites having economic and environmental advantages. In the field of technical utilization of plant fibers, flax fiber-reinforced composites represent one of the most important areas. On the other hand, lack of good interfacial adhesion and poor resistance to moisture absorption make the use of natural fiber-reinforced composites less attractive. In order to improve their interfacial properties, fibers were subjected to chemical treatments, namely, mercerization, silane treatment, benzoylation, and peroxide treatment. Selective removal of non-cellulosic compounds constitutes the main objective of the chemical treatments of flax fibers to improve the performance of fiber-reinforced composites. The objective of this study was to determine the effects of pre-treated flax fibers on the performance of the fiber-reinforced composites.Short flax fibers were derived from Saskatchewan-grown flax straws, for use in fiberreinforced composites. Composites consisting of high-density polyethylene (HDPE) or linear low-density polyethylene (LLDPE) or HDPE/LLDPE mix, chemically treated fibers and additives were prepared by the extrusion process. Extrusion is expected to improve the interfacial adhesion significantly as opposed to simple mixing of the two iii components. The extruded strands were then pelletized and ground. The test samples were prepared by rotational molding. The fiber surface topology and the tensile fracture surfaces of the composites were characterized by scanning electron microscopy to determine whether the modified fiber-matrix interface had improved interfacial bonding.Mechanical and physical properties of the composites were evaluated. The differential scanning calorimetry technique was also used to measure the melting point of flax fiber and composite.Overall, the scanning electron microscopy photographs of fiber surface characteristics and fracture surfaces of composites clearly indicated the extent of fiber-matrix interface adhesion. Chemically treated fiber-reinforced composites showed better fiber-matrix interaction as observed from the good dispersion of fibers in the matrix system. Special thanks to my graduate committee Charles Maulé, the chair, for providing a motivating and enthusiastic environment during the many discussions and his helpful feedback and suggestions. The critique of this thesis by Dr. Chris Zhang, external examiner, is acknowledged.

show abstract

Section: Surface Chemical Modifications Of Natural Fibersmentioning

confidence: 99%

Section: Mechanical Properties Of Compositesmentioning

confidence: 99%

Pre-treatment of Flax Fibers for use in Rotationally Molded Biocomposites

Wang

Panigrahi²,

Tabil³

et al. 2007

Journal of Reinforced Plastics and Composites

263

118

View full text Add to dashboard Cite

show abstract

“…However, the drop in tensile strength at 8% NaOH could be explained by the excess removal of cellulose content at the surface of the fiber by the high concentration of alkali, which would damage the fiber's structure (Manalo et al 2015). Different types of natural fibers have different optimum concentration of alkali during the pretreatment process, which later affects the performance of the composites (Misra et al 2002;Lee and Wang 2006;Boopathi et al 2012). The different chemical compositions between fibers and matrix limit their bonding.…”

Section: Fiber Pretreatment and Coupling Agentmentioning

confidence: 99%

A Review on the Tensile Properties of Bamboo Fiber Reinforced Polymer Composites

Shah

Sultan

Jawaid

et al. 2016

BioRes

100

View full text Add to dashboard Cite

a This paper reviews the tensile properties of bamboo fiber reinforced polymer composites (BFRP). Environmentally friendly bamboo fibers have good mechanical properties, which make them suitable replacements for conventional fibers, such as glass and carbon, in composite materials. Better fiber and matrix interaction results in good interfacial adhesion between fiber/matrix and fewer voids in the composite. Several important factors improve matrix-fiber bonding and enhance the tensile properties of BFRP. Coupling agents, such as maleic anhydride polypropylene (MAPP), improve the adhesion of bamboo fibers in the polypropylene (PP) matrix. A high percentage of lignin content in bamboo fibers limits fiber separation, which leads to less matrix absorption between fibers. Steam explosion is the best extraction method for bamboo fibers, although an additional mechanically rubbing process is required for fiber separation. Generally, high fiber content results in good composite performance, but at a certain limit, the matrix does not adhere well with a saturated amount of fibers, and the composite tensile strength decreases. However, the tensile modulus of BFRP is not affected by excess fiber content. Hybridization of bamboo with conventional fibers increases the tensile strength of BFRP. The addition of micro/nano-sized bamboo fibrils into the carbon fabric composites slightly enhances composite strength.

show abstract

“…A high cellulose content and low microfibril angle are desirable properties in a fibre to be used in polymer composites 3 . The properties of fibre-reinforced composites depend on many factors such as fibre-matrix adhesion, volume fraction of fibre, fibre aspect ratio, fibre orientation as well as stress transfer efficiency of interphase 9,10 . The potential strength and toughness of natural fibres have not yet been fully exploited because of poor chemical compatibility between hydrophilic fibre and the more hydrophobic polymer matrix.…”

Section: * Author For Correspondencementioning

confidence: 99%