| Solid buoyancy material is one important part of modern deep-dive technology. With the development of marine science, increasing of submerging depth and deterioration of the environment conditions, solid buoyancy material must have performance presents, such as low density, low-water absorbing, compressive resistance, corrosion resistance, etc. It was the focus to make research on solid buoyancy material of low density, high strength and low-water absorbing.Solid buoyancy material of hollow glass microbollons filled epoxy resin was prepared. By means of Scanning Electron Microscopy, Fourier transform infrared spectroscopy, compression test, water absorption test and seawater corrosion test, the effect of epoxy resin, curing agent and epoxy-terminated siloxane on compression performance and water resistance were systematic investigated. The effect of the size, volume fraction and surface treatment of hollow glass microbollons on the properties of density, void fraction, compression performance and water resistance were studied. What’s more, the fracture morphology and failure mechanism were analyzed too.The research results indicated:①Surface treatment greatly improved compatibility and interfacial adhesion of hollow glass microbollons and epoxy, which improved properties of compression performance, water resistance and sea-water resistance of the solid buoyancy material, with the increasing of volume fraction, the effect was more obvious. When the volume fraction of S38was60%, the compressive strength was114.7MPa, increased by6.1%compared with untreatment, the water absorption was1.36%, decreased by73.8%.②Density of the solid buoyancy material decreased with the increasing of volume fraction, instead, void fraction increased with the increasing of volume fraction, which resulted in a larger difference between theoretical density and experimental density. When the volume fraction of S38was10%-60%, the density was1.15g/cm3～0.68g/cm3.③With the same volume fraction, the density and compressive properties of solid buoyancy material prepared by smaller size of hollow glass microbollons was higher compared to larger size. If hollow glass microbollons was S38, for the compressive strength, when volume fraction was less than30%, little effect of volume fraction on the strength was observed. When more than30%, as volume fraction increased, the strength decreased gradually. If hollow glass microbollons was S60HS, the strength increased gradually as volume fraction increased until50%, but when more then50%, the strength decreased.④the failure mode was shear failure when volume fraction was less than40%. When50%, it behaved shear failure and destruction of collapse. When more than50%, it behaved destruction of collapse.⑤The cured epoxy in distilled water belonged to the Fick’s diffusion, Compared with epoxy TDE-85and CYD-128, curing agent m-PDA and MeTHPA, TDE-85cured by MeTHPA behaved better water resistance. Epoxy-terminated siloxane preploymer effectively improved the water resistance of the cured, when adding8%, water absorption was decreased by74.38%compared with unmodified. |
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