TRIS (77-86-1) is not only an important biological buffer, but also an important organic synthetic material. It plays different roles in modification and compounding of different materials.
Automobile brake pads are generally composed of steel plates, adhesive insulation layers and friction blocks. At present, the brake pads on the market mainly use phenolic resin and nitrile rubber, but phenolic resin is harmful to the environment, and its heat-resistant limit temperature is only about 250 ℃. When the temperature is too high, the thermal decomposition phenomenon is quite serious, which will affect the bonding strength between the friction block and the steel plate, even the friction block will fall off in serious cases. Therefore, it is necessary to find a new adhesive insulation material to replace it.
In order to solve the problem that the adhesive strength of the adhesive insulation layer of the brake pad decreases at high temperature, the modified hyperbranched polyimide resin is added Tris to improve the mechanical properties and high temperature resistance. At the same time, the end of hyperbranched resin contains a large number of hydroxyl groups, which can be crosslinked to form a stable system. The adhesive produced by the hyperbranched polyimide resin modified by Tris can closely bond the friction block with the steel plate, and can keep the adhesive strength at high temperature.
Modification of polyvinyl alcohol (PVA) by Tris
Polyvinyl alcohol (PVA) is a kind of polymer with multi hydroxyl structure. It has excellent water solubility, mechanical properties, gas barrier properties and biodegradability and so on. However, the polyhydroxy structure of PVA is easy to form hydrogen bonds between intramolecular chains and molecular chains, which makes the melting point of PVA very close to its decomposition temperature, which makes the thermoforming process very difficult.
The add of tris (77-86-1) changes the molecular structure of PVA. The added functional groups interacts with hydroxyl groups in PVA, which increases the decomposition temperature, obtains a wide melting processing window, and realizes the thermoplastic processing of PVA without adding any plasticizer. The mechanical properties of PVA modified by Tris are improved. Its tensile strength decreases and elongation at break increases.
TRIS is used for composite phase change materials
Phase change materials (PCM) are materials that change their states with temperature and provide latent heat. When the physical state changes, the temperature of the material itself remains almost unchanged until the phase transition is completed, forming a wide temperature platform, but the latent heat absorbed or released is quite large. PCM can be recycled almost indefinitely. It has the advantages of large latent heat, high energy storage density, controllable phase change temperature range and so on. It is the first choice for power battery thermal management systems.
Fill tris into porous silica with a pore size of 15 to 100 nm and porous glass with a pore size of 12 to 100 nm can produce composite energy storage materials. The morphology and thermal storage properties of the composites were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and differential scanning calorimetry (DSC). The space limitation of nanometer size affects the thermal storage performance of Tris, which significantly improves the phase change temperature, phase change latent heat, undercooling and thermal cycling performance of the composite phase change materials.