Modification Of Tourmaline By Carbene Chloride And Preparation Of Functional Polymer

Tourmaline mineral possess the excellent properties of releasing negative ions, adsorbing heavy metal ions and emitting far infrared rays. It was widely used in health care, sewage treatment, paint coatings and other fields. The surface of tourmaline is hydrophobic and has strong surface polarity and energy, which makes the tourmaline difficult to reconcile with the polymer and leads to the severe agglomeration among particles and poor dispersion in polymer. Therefore, the tourmaline/polymer composite material is hard to meet the application requirements. To solve these problems and improve the use of high-value mineral tourmaline, as well as broaden the application field of functional polymers, the surface modification of tourmaline was needed, and new process needs to developed, and then incorporate the modified tourmaline into the polymer to prepare the functional polymer which can release negative ions and emit far-infrared rays. This paper selected several organic agents to modify tourmaline and the double bond was introduced onto the surface of tourmaline, the organic polymerizable tourmaline was prepared. Then several copolymers were synthesized by copolymerization of modified tourmaline and acrylic ester. The performance of modified tourmaline was detected. The results can be concluded as follows:(1) 10-undecenoyl chloride was used to modify tourmaline to prepare tourmaline undecylenate. Then the tourmaline containing functional copolymer p(TUC/BA/MMA) was synthesized by copolymerization of modified tourmaline with MMA and BA. The structural characterization of copolymer proves that tourmaline was introduced into molecular structure of copolymer by chemical bonding. The copolymer possesses good dispersity and stability. The released negative ions increased with increasing the dosage of modified tourmaline and far-infrared radiation emissity reached about 0.9. It also possesses excellent mechanical property.(2) The polymerizable tourmaline methacrylate(TMC) was obtained by surface modification of methacryloyl chloride to tourmaline. Then the tourmaline containing functional copolymer p(TMC/BA/MMA) was synthesized by copolymerization of modified tourmaline with MMA and BA. The structural analysis shows that tourmaline was introduced into the molecular of polymer by procedures of surface modification and copolymerization. It exhibited good dispersion stability and its negative ions releasing amount almost linearly increased with increasing the modified tourmaline content. It also showed excellent mechanical property and its far-infrared radiation emissity can reached about 0.95.(3) Vinyl triethoxysilane was used to modify tourmaline and a novel organic polymerizable tourmaline vinyltriethoxysilane(TVS) was prepared. A silane-coupled tourmaline containing functional copolymer p(TVS/MMA/BA) was obtained by copolymerization of modified tourmaline with MMA and BA. The structural analysis proved that tourmaline was introduced into polymer by reaction with a silane coupling agent, and it showed excellent dispersion and storage stability. Its negative ions releasing amount almost linearly rises with increasing the modified tourmaline content. The far infrared radiation emissity of copolymer can reach about 0.95 and it possesses excellent property.Via comparison of p(TUC/MMA/BA), p(TMC/MMA/BA) and p(TVS/MMA/BA) copolymer obtained by modification and copolymerization through three modifiers, one can find that the copolymer p(TMC/MMA/BA) exhibits more excellent storage stability, negative ions releasing, far infrared radiation and mechanical properties.