Sound Absorption of Microperforated Panel Made from Coconut Fiber and Polylactic Acid Composite

ABSTRACT

This paper highlights the sound absorption performance of microperforated panel (MPP) made from coconut fiber and polylactic acid (PLA) composite named as biocomposite microperforated panel (BMPP). Coconut fiber was used to produce BMPP specimen and PLA was used as matrix. Impedance tube method was employed to identify the sound absorption performance of BMPP specimen while a porosity tester was used to determine the porosity of BMPP specimen. Comparison on the sound absorption performance between BMPP and steel MPP will be discussed in this paper. It has been found that BMPP with different composition percentage of coconut fiber and PLA possessed different sound absorption performance mainly due to the existence of pores and tortuous structure within the specimen itself. Scanning electron microscope (SEM) scan was performed to further analyze the structure of BMPP specimen.

摘要

研究了椰子纤维与聚乳酸（PLA）复合材料制备的微穿孔板（MPP）的吸声性能. 以椰子纤维为原料，以聚乳酸为基体，制备生物复合微孔板试样. 采用阻抗管法对生物复合材料微穿孔板试件的吸声性能进行了测试，并用孔隙率测试仪对其孔隙率进行了测试. 本文对生物复合材料微穿孔板与钢微穿孔板的吸声性能进行了比较. 研究发现，不同椰子纤维和聚乳酸组成比例的生物复合微穿孔板吸声性能不同，主要是由于试样内部存在孔隙和曲折结构. 采用扫描电子显微镜（SEM）对生物复合材料微孔板试样进行了结构分析.

KEYWORDS:

• Microperforated panel
• biocomposite microperforated panel
• sound absorption
• coconut fiber
• polylactic acid
• natural fiber composite

关键词:

• 微穿孔板
• 生物复合微穿孔板
• 吸声
• 椰子纤维
• 聚乳酸
• 天然纤维复合材料

Acknowledgments

This research work was aided by a grant (Grant Code U741) from Research Management Centre (RMC), Tun Hussein Onn University of Malaysia (UTHM).

Declaration of conflicting interest

The authors declare that there is no conflict of interest apropos to the publication of this paper.

Additional information

Funding

This work was supported by the Universiti Tun Hussein Onn Malaysia [Postgraduate Research Grant (U741)].