Surface modification of hollow glass microsphere and its marine-adaptive composites with epoxy resin

Abstract

A novel epoxy resin (EP)/hollow glass microsphere modified (g-HGM) composite was successfully prepared. Studies showed that the water absorption rate of the g-HGMs/EP composite is lower than pure HGMs/EP and HGMs-KH550/EP composites, while the compressive strength of g-HGMs/EP composites could be increased. The enhanced interfacial adhesion between EP and g-HGMs played an important role to improve the compatibility of the two components. The g-HGMs show little effect on density (relative to HGMs) on the g-HGMs/EP composites, which can perform better than the HGMs/EP composites being used in marine environments. It was found that the optimal content of 4,4’-diphenylmethane diisocyanate in the epoxy component was 20 wt%.

Effects of silane coupling agent modifications of hollow glass microspheres on syntactic foams with epoxy matrix

“…In this study, syntactic foams were prepared by mixing bisphenol A epoxy resin E51 (matrix resin) with polyamide curing agent 651 (epoxy curing agent) with hollow glass microspheres modified by silane coupling agents. The manufacturer’s recommended ratio of epoxy resin to curing agent is 100:40–60, the experiment selected 100:43.4, curing conditions selected the previous 25 curing conditions 80°C for 2 h.…”

“…35,36 Third, after grafting silane coupling agent on the surface of hollow glass microspheres, the active group that can react with the substrate is connected, and the compatibility and binding force of hollow glass microspheres and substrates are enhanced. 25 Among them, silane coupling agent treatment is the most commonly used to enhance the binding force of microspheres and substrates of the modification means, which can enhance the wear resistance of composite foam materials, heat resistance, extreme cold resistance, 37 water resistance, and so on. According to the current literature, [23][24][25][26][35][36][37] the main use of 3-Aminopropyltriethoxysilane silane coupling agent modified hollow glass microspheres, for other types of silane coupling agents studied less.…”

“…By bonding inorganic fillers with -Y groups on the surface and polymers, the bonding between inorganic fillers and polymers is improved. [21][22][23][24][25][26] Hence, the effect of the silane coupling agent on the treatment of inorganic fillers depends on two factors. The first is the extent of reaction between -Si(OR) 3 groups in the silane coupling agent after hydrolysis and inorganic fillers.…”

“…25 Among them, silane coupling agent treatment is the most commonly used to enhance the binding force of microspheres and substrates of the modification means, which can enhance the wear resistance of composite foam materials, heat resistance, extreme cold resistance, 37 water resistance, and so on. According to the current literature, [23][24][25][26][35][36][37] the main use of 3-Aminopropyltriethoxysilane silane coupling agent modified hollow glass microspheres, for other types of silane coupling agents studied less. Therefore, it is necessary to carry out a study on the effect of different structural silane coupling agents on the performance of composite foams in order to obtain the best hollow glass microsphere treatment effect.…”

Current Status of Research on the Modification of Thermal Properties of Epoxy Resin-Based Syntactic Foam Insulation Materials

“…The application of epoxy resin-based syntactic foam in missile launchers can effectively reduce the density and improve the heat resistance of the launcher. Epoxy resin-based syntactic foams can be employed in solid buoyancy materials [ 2 ] to effectively reduce their water absorption [ 3 , 4 ], and can greatly improve the compressive strength of lightweight buoyancy materials. This feature is suitable for water diffusion leakage current testing of insulation materials used in electrical equipment.…”