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dc.contributor.authorChaochanchaikul, Kantimaen_US
dc.contributor.authorHarnnarongchai, Wanlopen_US
dc.contributor.authorกัลทิมา ชาว์ชาญชัยกุล
dc.contributor.authorวัลลภ หาญณรงค์ชัย
dc.date.accessioned2016-09-01T05:40:54Z
dc.date.available2016-09-01T05:40:54Z
dc.date.issued2016-09-01
dc.identifier.urihttp://repository.rmutp.ac.th/handle/123456789/1961
dc.descriptionรายงานการวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2558en_US
dc.description.abstractThis research work was to study the effect of surface treatment of natural fiber and the effects of type and content of natural fiber on the development of acoustic material from natural rubber foam /natural fiber composites. The surface treatment used for this research work was sodium hydroxide (NaOH) treatment. NaOH Concentrations and treatment times were varied from 0 to 15 %wt. and 0 to 30 min, respectively. Natural fibers used for this work were bagasse fiber (BF) and oil palm fiber (OPF). The suitable condition for surface treatment was estimated by fiber length and diameter (L/D) ratio and morphology of natural fiber. The result suggested that L/D ratios tended to increase when NaOH concentrations and/or treatment times increased except for NaOH concentration of 15 %wt. L/D ratios of OPF after surface treatment were changed more than those of BF. The suitable conditions of NaOH treatment for BF and OPF were NaOH concentration of 10 %wt. and surface treatment times of 30 and 10 min, respectively. The effects of fiber type and content on sound absorption properties of natural rubber foam /natural fiber composites were investigated by cell characteristics, sound absorption coefficient, DMA analysis and bulk density. Both treated BF and OPF with suitable treatment condition were varied from content of 0.0 to 10.0 %wt. The result showed that the cell size of composites tended to decrease with addition of natural fiber whereas number of foam cell per unit volume increased. After adding natural fiber more than 2.5 %wt., cell size of composite foam and number of foam cell per unit volume tended to change the inverse direction. Natural fiber in composites enhanced the sound absorption efficiency. Sound absorption coefficient of composites adding BF was more than that of composite adding OPF. The addition of natural fiber enhanced the elasticity of composites and that increased sound absorption efficiency. NaOH treatment led to creation of strong interfacial bonding between natural fiber and natural rubber and enhanced the sound absorption efficiency. Density of NR composite foam increased with increasing natural fiber content.en_US
dc.description.sponsorshipRajamangala University of Technology Phra Nakhonen_US
dc.language.isothen_US
dc.subjectเส้นใยธรรมชาติ
dc.subjectวัสดุผสม
dc.subjectกรรมวิธีการผลิต
dc.subjectวัสดุ
dc.subjectMaterial
dc.subjectManufacturing Processes
dc.subjectGraphic materials
dc.subjectComposites
dc.subjectNatural fibers
dc.subjectวัสดุ
dc.subjectวัสดุกราฟฟิค
dc.titleProduction of acoustic materials from natural rubber foam and natural fiber compositesen_US
dc.title.alternativeการผลิตวัสดุดูดซับเสียงจากวัสดุผสม ยางโฟมธรรมชาติและเส้นใยธรรมชาติen_US
dc.typeResearch Reporten_US
dc.contributor.emailauthorkantima.cha@hotmail.com
dc.contributor.emailauthorwanlop.h@eng.kmutnb.ac.th


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