Chemically induced graft copolymerization of acrylonitrile onto lignocellulosic fibers

Singha, A. S.; Rana, Raj K.

doi:10.1002/app.35221

Cited by 25 publications

(12 citation statements)

References 39 publications

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“…The grafting with binary mixture of monomers provides an opportunity to prepare the material for specific applications (Singha and Rana, 2010b , 2012a ). However, in these investigations no systematic analysis of grafting parameters has been reported, as has been carried out using binary mixture of monomers.…”

Section: Introductionmentioning

confidence: 99%

Microwave induced synthesis of graft copolymer of binary vinyl monomer mixtures onto delignified Grewia optiva fiber: application in dye removal

et al. 2014

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Grafting method, through microwave radiation technique is very effective in terms of time consumption, cost effectiveness and environmental friendliness. Via this method, delignified Grewia optiva identified as a waste biomass, was graft copolymerized with methylmethacrylate (MMA) as an principal monomer in a binary mixture of ethyl methacrylate (EMA) and ethyl acrylate (EA) under microwave irradiation (MWR) using ascorbic acid/H2O2 as an initiator system. The concentration of the comonomer was optimized to maximize the graft yield with respect to the primary monomer. Maximum graft yield (86.32%) was found for dGo-poly(MMA-co-EA) binary mixture as compared to other synthesized copolymer. The experimental results inferred that the optimal concentrations for the comonomers to the optimized primary monomer was observed to be 3.19 mol/L × 10−1 for EMA and 2.76 mol/L × 10−1 for EA. Delignified and graft copolymerized fiber were subjected to evaluation of physicochemical properties such as swelling behavior and chemical resistance. The synthesized graft copolymers were characterized with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and X-ray diffraction techniques. Thermal stability of dGo-poly(MMA-co-EA) was found to be more as compared to the delignified Grewia optiva fiber and other graft copolymers. Although the grafting technique was found to decrease percentage crystallinity and crystallinity index among the graft copolymers but there was significant increase in their acid/base and thermal resistance properties. The grafted samples have been explored for the adsorption of hazardous methylene dye from aqueous system.

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Section: Introductionmentioning

confidence: 99%

Microwave induced synthesis of graft copolymer of binary vinyl monomer mixtures onto delignified Grewia optiva fiber: application in dye removal

et al. 2014

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“…These surface treatments can also improve the degree of adhesion between flax fiber and polymer matrices. 5,[7][8][9][10][11][12][13][14][15][16][17][18][19] However, chemical treatments often adversely affect the properties of flax fibers. For example, the alkaline treatment can decrease the tensile modulus of cellulosic fibers.…”

Section: Introductionmentioning

confidence: 99%

Study on interfacial properties of unidirectional flax/vinyl ester composites: Resin manipulation on vinyl ester system

Huo¹,

Chevali²,

Ulven³

2012

J of Applied Polymer Sci

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Flax fibers are widely used as reinforcements in bio-based polymer matrix composites. This study investigated the hydrophilic nature and surface purity of flax fiber that affects fiber/matrix adhesion in combination with hydrophobic structural polymers via matrix modification and the utilization of fiber treatment, specifically in a flax/vinyl ester (VE) composite. A new method to manipulate the vinyl ester system with acrylic resin (AR) was developed to produce flax reinforced. On the other hand, different types of chemical and physical treatments were applied on the flax fiber. FTIR was applied to evaluate the effects of surface treatments. Dynamic mechanical analysis (DMA) was used to analyze the unmodified and modified VE resin system. The surface of untreated and treated flax fibers and their composites were analyzed by scanning electronic microscopy (SEM). Sodium ethoxide-treated flax/ VE with 1% (wt) AR caused the best mechanical performance among all the flax/VE composites evaluated.

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“…Properties such as moisture absorption tendency, resistance to chemicals, and thermal stability are found to be improved by grafting natural fibers with vinyl monomers. [127] Mishra et al [128] studied the effect of acrylonitrile graft copolymerization on sisal fibers using combined initiators like NalO 4 and CuSO 4 in aqueous medium. 25% of grafting resulted in less water absorption while 5% of grafting increased the tensile strength and young's modulus.…”

Section: Graft Copolymerizationmentioning

confidence: 99%

Biofiber‐reinforced polymeric hybrid composites: An overview on mechanical and tribological performance

Chandgude

Salunkhe

2020

Polymer Composites

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This article presents a thorough review of biofiber-based hybrid composites along with the discussion on its mechanical and tribological performance in the polymeric matrix. Emphasis is centered on plant fibers as animal fibers are not frequently used and mineral fibers possess serious health issues. All five types of plant fibers and their hybrids are reviewed. Hybridization of plant fibers synergetically combines individual benefits while eliminating the limitations of single fiber use. Study regarding fiber origin, processability and extraction techniques, composition, chemical surface treatments, and applications are presented. Finally, the results obtained are summarized and future developments are discussed. The review concludes that biofiber hybrid composites possess great potential in several applications provided that satisfies design constraints and polymeric matrix compatibility issues.

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Chemically induced graft copolymerization of acrylonitrile onto lignocellulosic fibers

Cited by 25 publications

References 39 publications

Microwave induced synthesis of graft copolymer of binary vinyl monomer mixtures onto delignified Grewia optiva fiber: application in dye removal

Microwave induced synthesis of graft copolymer of binary vinyl monomer mixtures onto delignified Grewia optiva fiber: application in dye removal

Study on interfacial properties of unidirectional flax/vinyl ester composites: Resin manipulation on vinyl ester system

Biofiber‐reinforced polymeric hybrid composites: An overview on mechanical and tribological performance

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