Technical diving is an important part of national security and marine resources development technology. In order to improve the body has sufficient net drag diving buoyancy, diving and underwater robots pressure resistance, structural stability, people started to develop lightweight, high strength solid buoyant material to replace the traditional ball pressure and buoyancy buoyancy tube solid buoyant material to ensure that the necessary buoyancy submersible, submersible increase payload, reducing its dimensions, especially in the construction of the deep-sea submersible, can improve their underwater movement, flexibility and security and reliability.
In order to conform to the trend, the preparation of solid buoyancy material is particularly important. First, to determine the experimental materials, pharmaceutical and research methods, the preparatory work done in order to successfully complete the course of future operations. The following is the content of the above detailed description.
1. Experimental Materials
Hollow glass microsphere is an appearance of gray or gray with a hard shell spherical hollow particles, whose main ingredient is SiO2 and Al2O3, thickness 8% to 10% of its diameter. The amount of hollow glass microspheres in the parent material proportion of larger families, the quality of the properties of the material plays a decisive role. In order to achieve high-density hollow glass microsphere filling purposes, selection criteria microbeads generally requires its low density, small size, a large wall thickness.
Requires the matrix material is strong adhesion, low water absorption, excellent thermal and electrical properties, epoxy is the preferred object. After the general purpose epoxy curing, hard and brittle texture, resistance to cracking, low impact resistance, but poor heat resistance, easy selection; bisphenol A type epoxy resin having good adhesive strength, thermal stability, dimensional stability and processing technology are more prominent, so I chose Bluestar New Chemical Materials Co., Ltd. Wuxi WSR6101 epoxy resin production plant as the parent material.
Experimental adjuvants diluent: In order to obtain high loading of the composite material, must reduce the viscosity of the epoxy resin diluents can reduce viscosity of the resin, the resin having fluidity, improve the resin on the reinforcing material, a filler such as wettability control. the reaction time of thermal curing, extended pot life of the resin curing system. Depending on the characteristics of the matrix material, the proposed use of low viscosity, having an epoxy group, can be involved in the curing of 660A (propylene oxide-butyl ether) as a diluent. hardener : using different curing system, which casting body has a compressive strength greater difference.
2. Experimental equipment
Experimental equipment: SANS computer electronic universal testing machines, electronic scales, vacuum oven, electric sets, microscopes, scanning electron microscope.
3. Experimental Methods
The quantity of diluent is added to the epoxy resin Stir, then add a different amount of hardener mix evenly, then the right amount of hollow glass microspheres and coupling join Stir into premixes, and finally into the already good mold release agent coating, to be cured after demolding, remove Shape.
4. Analytical detection methods
Determination of compressive strength: the material section spraying treatment, using scanning electron microscopy and breakage of glass microsphere distributed in the material.