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The structural, dielectric, and dynamic properties of NaOH-treated Bambusa tulda reinforced biocomposites—an experimental investigation

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Abstract

The use of synthetic fibers as reinforcement has been restricted as a result of enhanced ecological awareness and stringent laws and regulations by government agencies. Consequently, engineers and researchers are now developing sustainable composites using natural fibers. The goal of this experimental study is to develop sustainable biocomposites with improved structural, static, dynamic, mechanical, and dielectric characteristics using cashew nut shell biomass-based polymer and Bambusa tulda fiber. Fiber from Bambusa tulda has been extracted and subjected to various NaOH solution concentrations (2 to 10% with an interval of 2 (w/v)). The composite has been developed with 30% fiber loaded differently treated bamboo fiber and characterized by performing XRD, FTIR, tensile testing, DMA, and different dielectric tests. The result revealed that chemical treatment increased the crystallinity index of the biocomposites. The maximum crystallinity index has been observed as 51.73% with 6% NaOH-treated bamboo fiber reinforced biocomposites. The maximum tensile strength and storage modulus have been reported as 132.91 MPa and 8378 MPa, respectively for 6% NaOH-treated fiber reinforced biocomposites (BFC_30_T6). BFC_30_T6 exhibits higher properties because of the increased crystallinity index of fiber and better interfacial interaction between fiber and polymer matrix after the chemical treatment. Chemical treatment with more than 6% NaOH concentration reduces the dielectric constant, dielectric loss, and ac conductivity of the composites. Conversely, treatment with 8 and 10% NaOH concentrations results in a quick increase in dielectric and conductivity values.

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Acknowledgements

The authors would like to thank CIF, the Center for the Environment and Smart Materials and Structures Lab, IIT Guwahati, for providing the different testing facilities. The authors are also grateful to Cardolite Specialty Chemicals India LLP, Mangalore, India, for providing bio-epoxy free of cost.

Funding

This experimental investigation is supported by DST (grant no. TDP/BDTD/03/2021(G)), Govt. of India.

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  1. Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, India, 781039

    Abir Saha, Nikhil Dilip Kulkarni, Mukesh Kumar & Poonam Kumari

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Contributions

Abir Saha: investigation, methodology, writing—original draft and review and editing.

Nikhil Dilip Kulkarni: investigation, methodology, writing—review and editing.

Mukesh Kumar: investigation, methodology.

Poonam Kumari: Supervision, writing—review and editing.

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Correspondence to Abir Saha.

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Saha, A., Kulkarni, N.D., Kumar, M. et al. The structural, dielectric, and dynamic properties of NaOH-treated Bambusa tulda reinforced biocomposites—an experimental investigation. Biomass Conv. Bioref. (2023). https://doi.org/10.1007/s13399-023-04709-5

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