Lignin and complex coupling agent
, because of the large specific surface area of nano calcium carbonate particles and organic resin matrix between the good interface bonding force, can form a network structure in paint dry quickly, at the same time gap exists between large particles and film packing, can reduce capillary effect, so as to improve the strength, hardness, wear resistance of the coating properties, therefore, is applied to nanometer calcium titanate coating has become one of hotspots in the field of nanometer materials today, at the same time also to widen the application field of nanometer calcium carbonate plays a very important role, on the one hand, due to the inertia of nanometer calcium carbonate is hydrophilic powder, the surface does not exist with resin chemical combination such as the function of active group; Ultra-micronization model. the corresponding particles, on the other hand, increasing the surface energy, thereby increasing the nanoparticles agglomeration generated the possibility of secondary structure, increase the dispersion of nano calcium titanate in kicked the difficulty.
so must correspondingly of nanometer calcium carbonate surface activation treatment, lower surface energy and increase the surface active groups, improve and organic resin matrix interface wettability, strengthen the interaction with injection molding processing of resin matrix, to improve the dispersion, to improve the performance of coatings.
a professor put forward before, titanate coupling agent and inorganic filler is titanate Ti in the champions league to provide space Sp3d2 hybrid orbitals, and filler surface coordination chemistry provides the lone pair electrons. They use X-ray photoelectron spectroscopy and reflection to absorb ultraviolet spectrum, titanate coupling agent is studied and the interaction between calcium carbonate and silica filler. Studied by spectrophotometry, the dynamics of titanate coupling agent treatment packing process. So for the coupling mechanism of titanate coupling agent research still have very important significance.
a: titanate coupling agent in the application of inorganic filler, click directly.
http://www。 csssld。 cn//html/2016/Info_0730/304。 HTML
nantong on suye's official website: http://www. csssld。 cn//