The role of TRIS (77-86-1) in composite materials

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 TRIS (77-86-1) is not only an important biological buffer, but also an important organic synthetic material. It plays different roles in different material modification and compounding.
Modification of hyperbranched polyimide by TRIS (77-86-1)
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 the heat resistance 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 of the friction block and the steel plate. In severe cases, the friction block will fall off. Therefore, it is necessary to find a new type of adhesive insulating material to replace phenolic resin.
In order to solve the problem that the adhesive strength of the adhesive insulation layer of the brake pad decreases under high temperature conditions, TRIS is introduced into the modified hyperbranched polyimide resin, which improves the mechanical properties and high temperature resistance of the hyperbranched polyimide. At the same time, the end of the hyperbranched resin contains a large number of hydroxyl groups, which can be cross-linked to form a stable system. The adhesive prepared by using TRIS modified hyperbranched polyimide resin can tightly bond the friction block and the steel plate together, and the bonding strength does not decrease at high temperature.
Modification of polyvinyl alcohol (PVA) by TRIS
Polyvinyl alcohol (PVA) is a polymer with a polyhydroxy structure, which has excellent water solubility, mechanical properties, gas barrier properties and biodegradability. However, the polyhydroxyl structure of PVA easily forms hydrogen bonds between intramolecular chains and molecular chains, making the melting point of PVA very close to its decomposition temperature, which makes the thermoforming process very difficult.
The introduction of TRIS (77-86-1) changed the molecular structure of PVA, the introduced functional groups interacted with the hydroxyl groups in PVA, increased the decomposition temperature, obtained a wider melt processing window, and realized the thermoplastic processing of PVA. No need to add any plasticizer. The mechanical properties of PVA modified with Tris are improved, the tensile strength is decreased, and the elongation at break is increased.
TRIS for composite phase change materials
Phase change material (PCM) refers to a material that changes its state with temperature and provides latent heat. When the physical state changes, the temperature of the material itself remains almost unchanged until the phase transition is completed, forming a broad temperature plateau, but the latent heat absorbed or released is quite large. PCM can be used almost infinitely and has the advantages of large latent heat, high energy storage density, and controllable temperature range of phase transition. It is the selection of power battery thermal management system.
TRIS was filled into porous silica with a pore size of 15-100 nm and porous glass with a pore size of 12-100 nm to prepare composite energy storage materials. The morphology and thermal storage properties of the obtained composites were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and differential scanning calorimetry (DSC). The spatial confinement of nanometer size affects the heat storage performance of TRIS, which significantly improves the phase transition temperature, latent heat of phase transition, supercooling, and thermal cycling performance of the composite phase change material.