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Nano TiO2 titanium dioxide powder can be used in Pulping and Papermaking

December 16,2020.
Application of Nano TiO2 in Pulping and Papermaking

1 Application in the preparation of functional paper

Japan has earlier developed a functional paper with nano-titanium dioxide. This product has a photocatalytic function and can be used for packaging paper and interior wallpaper. This type of functional paper can effectively absorb harmful gases such as formaldehyde, benzene, and ammonia. Hebei Maisen Titanium Dioxide Co., Ltd. has developed a highly weather-resistant, wear-resistant decorative base paper, and improved the filler used in the decorative base paper. The improved filler product has both a mechanical/inorganic three-dimensional interpenetrating network structure and both inorganic rigidity. Very abrasion resistance, greatly improving the overall performance of the paper. Nano-titanium dioxide used in general paper products, such as toilet paper, food packaging paper, etc., also has the effect of sterilization.

2 Application in the wet end of papermaking

The chemical nature of the wet end of papermaking is a kind of surface and colloidal chemistry. The structure of many components in the wet-end furnishings of papermaking is very small, so the introduction of special nano-level components can greatly improve the papermaking effect [14]. Nano-titanium dioxide is used as a retention and drainage aid in the wet end of papermaking, and has a good retention and drainage aid effect. Secondly, due to its excellent performance, it can also effectively inhibit the pollution and damage of DCS harmful substances to the white water.

3 Application in waste paper deinking

In the paper industry, the ink particles in the secondary fibers have a great influence on paper. There are two methods of deinking: flotation and washing. The former is often used in industry because it is more effective in removing large-particle inks. Because nano-titanium dioxide has positive charge and large specific surface area, it has an efficient flotation effect on ink particles in secondary fibers. The addition of nano-titanium dioxide in the flotation process can also remove stickies in waste paper pulp to a certain extent.

4 Application in papermaking wastewater treatment

Pulping and papermaking wastewater mainly includes cooking wastewater, pulp washing wastewater, papermaking wastewater, etc. These waste liquids mainly contain large amounts of lignin and various phenolic organic compounds. While photocatalytic oxidation can treat papermaking wastewater, it can also degrade lignin and phenols and completely eliminate toxicity. At the same time, it also has a good degradation effect on the toxic and difficult-to-biodegradable organics in the papermaking wastewater. The use of nano titanium dioxide to treat papermaking wastewater can make it meet the standard discharge volume and greatly reduce environmental pollution.


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