Effect of Modified Tourmaline Powder on Properties of ABS Composites

Tourmaline is used in water purification, medical treatment and other fields due to its piezoelectricity, far-infrared properties and the ability to release air negative ions. However, its raw material is a single tourmaline material, which limits its application and cannot meet people’s requirements for modern materials. Therefore, new functional composite materials obtained by blending tourmaline and other materials have become a current research hotspot.

ABS resin is a graft copolymer composed of three monomers of acrylonitrile, butadiene and styrene. It has high strength and high toughness, strong corrosion resistance to acid, alkali and salt, and good molding processability. Well, the finished product has the characteristics of smooth surface, easy dyeing and electroplating, etc., and has been widely used in various fields.

The surface of tourmaline powder was modified with sodium stearate and titanate, and the modified tourmaline was blended with ABS resin to prepare tourmaline/ABS composite material. The results showed that:

(1) The tourmaline powder was successfully modified by sodium stearate and titanate, which reduced its hydrophilicity and improved its interface binding force with ABS resin.

(2) With the increase of the amount of modified tourmaline in ABS resin, the tensile strength and impact strength of tourmaline/ABS composites first increased and then decreased. Compared with the ABS resin without added tourmaline, when the amount of modified tourmaline was 2%, the tensile strength of the composite material increased by 11.30%; when the amount of modified tourmaline was 3%, the impact strength of the composite material The strength increased by 38.18%. The composite material can also release negative ions. When the amount of modified tourmaline is 3%, the negative ion release amount of the composite material is 456.5/cm2, which expands the application range of ABS resin.