Soda pulping of sunn hemp (<i>Crotalaria juncea</i> L.) and its usage in molded pulp packaging

Piyawan Yimlamai; Theerat Ardsamang; Pratuang Puthson; Phichit Somboon; Buapan Puangsin

doi:10.1016/j.jobab.2023.04.003

Volume 8 Issue 3

Jul. 2023

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Piyawan Yimlamai, Theerat Ardsamang, Pratuang Puthson, Phichit Somboon, Buapan Puangsin. Soda pulping of sunn hemp (Crotalaria juncea L.) and its usage in molded pulp packaging[J]. Journal of Bioresources and Bioproducts, 2023, 8(3): 280-291. doi: 10.1016/j.jobab.2023.04.003

Citation:

Piyawan Yimlamai, Theerat Ardsamang, Pratuang Puthson, Phichit Somboon, Buapan Puangsin. Soda pulping of sunn hemp (Crotalaria juncea L.) and its usage in molded pulp packaging[J]. Journal of Bioresources and Bioproducts, 2023, 8(3): 280-291. doi: 10.1016/j.jobab.2023.04.003

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Soda pulping of sunn hemp (Crotalaria juncea L.) and its usage in molded pulp packaging

doi: 10.1016/j.jobab.2023.04.003

Department of Forest Products, Faculty of Forestry, Kasetsart University, Bangkok 10900, Thailand

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Corresponding author: E-mail address: piyawan.yi@ku.th (P. Yimlamai)
Received Date: 2023-02-22
Accepted Date: 2023-04-16
Rev Recd Date: 2023-04-10
Publish Date: 2023-07-30

Abstract

Abstract

Petroleum-based materials are often used in the packaging industry. However, the single use value of such products can be problematic with regard to proper waste disposal. As such, molded pulp packaging can be used as an alternative, given its ease of recycling, composting, and eventual biodegradation. In this work, we aims to study the pulp properties of sunn hemp and its usage as molded pulp products. For this purpose, unbleached beaten and unbeaten soda pulps derived from the whole stem of sunn hemp were examined for their fiber morphology, fibrillation, fiber classification, and physical properties. The sunn hemp pulp was subsequently molded using a batch molding machine. To determine the hydrophobicity of the molded pulp products, the molded samples were manufactured with and without additives. Finally, some properties of the molded pulp products were examined and compared with the commercially available bleached bagasse molded pulp products. It was observed that the molded products made from sunn hemp pulp with additives had a higher water contact angle than that of the commercial products. In terms of general usage, the molded products from sunn hemp pulp with additives were found to be capable of storing hot water, hot cooking oil, as well as microwaving water. We concluded that the sunn hemp pulp could be used as an alternative fibrous raw material in the production of molded pulp packaging.
- Contact angle,
- Fiber classification,
- Fibrillation,
- Molded pulp,
- Soda pulping,
- Sunn hemp

Declaration of Competing Interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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References(34)

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