Abstract
We have studied the effects of silane coupling agents used for the surface treatment of fiber on the tribological properties of hemp fiber (HF) reinforced plant-derived polyamide 1010 (PA1010) biomass composites. Hemp fibers were surface-treated by two surface treatment methods: (a) alkali treatment by sodium hydroxide solution and (b) surface treatment by silane coupling agents. Three types of silane coupling agents, namely aminosilane, epoxysilane and ureidosilane were used. These HF/PA1010 biomass composites were extruded using a twin extruder, and injection-molded. The mechanical and tribological properties were evaluated by the ring-on-plate type sliding wear test. It was found that tribological properties of HF/PA1010 biomass composites improved with the surface treatment by the silane coupling agent. This may be attributed to the change in the mode of friction and wear mechanism by the interfacial adhesion between fiber and matrix polymer according to the type of silane coupling agent used. In particular, the ureidosilane coupling agent showed the best improvement effect for the tribological properties of these biomass composites in this study.
Highlights
Natural fibers, such as bamboo, banana, flax, hemp, jute, kenaf, ramie, and sisal fibers, used for reinforcing polymer composites, are attracting considerable attention from industry [1,2,3,4,5,6,7].These natural fibers have unique ecological advantages over inorganic fibers such as glass and carbon fibers because they are renewable, have relatively high strength, stiffness, low density, are low cost, biodegradable, and can be incinerated [8]
We investigated the thermal, rheological, mechanical and tribological properties of hemp fiber (HF) reinforced plant-derived polyamide 1010 (PA1010) biomass composites (HF/PA1010) to develop new engineering materials and tribomaterials made of 100% inedible plant-derived materials [7,40,41,42,43,44,45,46,47]
This indicates that pv values are closely related to the load the load carrying ability. These results suggest the following mechanisms for improving the limiting carrying ability. These results suggest the following mechanisms for improving the limiting pv value pv value of various surface-treated HF/PA1010 biomass composites: the ability to support the load of various surface-treated HF/PA1010 biomass composites: the ability to support the load increases increases when filled with HF, the surface treatment by the combination of NaOH alkali treatment when filled with HF, the surface treatment by the combination of NaOH alkali treatment and silane and silane coupling agent, the volume fiber
Summary
Natural fibers, such as bamboo, banana, flax, hemp, jute, kenaf, ramie, and sisal fibers, used for reinforcing polymer composites, are attracting considerable attention from industry [1,2,3,4,5,6,7] These natural fibers have unique ecological advantages over inorganic fibers such as glass and carbon fibers because they are renewable, have relatively high strength, stiffness, low density, are low cost, biodegradable, and can be incinerated [8]. Little attention had been given to the use of such composites in the field of polymeric tribomaterials [9,10,11,12] (for mechanical sliding parts such as bearing, cum, gear, and seal) Studies in this field are gradually increasing in recent years [13,14,15,16,17,18,19,20,21,22]. It should be noted that most of these studies use the polymer made from petroleum as the matrix polymer of such composites
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