在二氧化钛的表面上包覆一层保护膜，使二氧化钛的表面和周围介质之间产生屏障，从而降低二氧化钛的光化学活性，有利于提高二氧化钛的分散性、耐光性、耐候性和抗粉化性．影响颗粒包膜均匀性和致密性的主要因素是颗粒的分散、加料方式、溶液的酸度和陈化时间等．包膜的均... A protective film is coated on the surface of the titanium dioxide to form a barrier between the surface of the titanium dioxide and the surrounding medium so as to lower the photochemical activity of the titanium dioxide and improve the dispersibility, light fastness, weatherability and powder resistance of the titanium dioxide. The main factors affecting the uniformity and compactness of the particle coating are particle dispersion, feeding method, solution acidity and aging time. Envelope are ...