Wuhan Research Institute of Materials Protection

Wulin Zhang

Dan Jia

Tian Yang

Shengpeng Zhan

Haitao Duan

Yinhua Li

Lixin Ma

Jian Li

Jiesong Tu

Yijie Jin

Changxin Wan

This invention provides a preparation method of solid self-lubricating material with high temperature resistance, including steps described as follows: first, mixing polymer matrix resin and nano lubricating filler to compose a uniform raw material powders; then, placing the raw material powders in the cavity of hot-press die; keeping the temperature for 90-120 min at the first prepressing temperature, controlling the hot-pressing pressure under the third pre-loading pressure, and gradually increasing the temperature to the solid-phase molding temperature of the material; gradually reducing the temperature to the first preloading temperature after the solid-phase molding is completed; next, removing the pressure, finally, obtaining the solid self-lubricating material by naturally cooling to normal temperature and demoulding. This invention adjusts the hot-pressing molding temperature according to the drift value of glass transition temperature, in order to avoid the degradation of tribological properties and mechanical properties caused by uneven plasticization and overheating of composite materials during the compression molding process.

Preparation method of solid self-lubricating material with high temperature resistance

A titanium dioxide micro-nanocontainers, corrosion-resistant waterborne epoxy coatings and preparation method thereof, including preparation steps as follows: TiOmicro-nano spheres are synthesized by applying hydrothermal method; a polyaniline layer doped with molybdate ions is deposited on the surface of TiOmicro-nano spheres by adopting the method of in-situ chemical polymerization, TiO/PANI-MoOmicro-nano-spheres are obtained, then, polydopamine is encapsulated on the surface of TiO/PANI-MoOmicro-nano spheres to obtain titanium dioxide micro-nanocontainers; next, antirust filler, defoamer, dispersant and thickener are added into waterborne epoxy emulsion, then titanium dioxide micro-nanocontainers are added in the waterborne epoxy emulsion for dispersing and grinding, filtering and encapsulating to obtain component A; the waterborne epoxy curing agent and deionized water are mixed in proportion to obtain component B; component A is stirred, then it is mixed with the component B in proportion, corrosion-resistant waterborne epoxy coatings is obtained. According to the invention, the titanium dioxide micro-nanocontainers is synthesized and added into the coating as an additive, which can not only improve the compatibility between the filler and the emulsion, but greatly improves the long-term corrosion resistance of the coating by prolonging the release time of the corrosion inhibitors.

Titanium dioxide micro-nanocontainers, corrosion-resistant waterborne epoxy coating and preparation method thereof

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Wuhan, China

Wulin Zhang