Composite conductive paper containing carbon nanotubes and preparation method thereof
A composite conductive and carbon nanotube technology, which is applied in papermaking, paper, paper coating, etc., can solve the problems of conductive paper humidity sensitivity, unfavorable application, and large difference in conductivity of conductive paper, so as to achieve uniform dispersion of raw materials and improved conductivity Effect
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[0045] A preparation method of composite conductive paper containing carbon nanotubes, comprising the following steps:
[0046] S1. Preparation of modified nanocellulose;
[0047] S2, mechanically mixing the modified nanocellulose and carbon nanotubes in water to prepare a first suspension;
[0048] S3, dispersing the modified inorganic micro-nano particles in an organic solvent to prepare a second suspension;
[0049] S4, depositing the first suspension, drying to prepare a first functional layer, depositing the second suspension on the first functional layer, drying to prepare a second functional layer.
[0050] Specifically, in step S1, cellulose is used as a raw material to prepare modified nanocellulose. The source of cellulose is selected from various plants in nature, such as wood, cotton, hemp, straw, wheat straw, and the like. It is understandable that the treatment of virgin cellulose such as swelling and beating to increase the surface area is conducive to the di...
Embodiment 1
[0089] The present embodiment provides a composite conductive paper and a preparation method thereof, the steps are as follows:
[0090] S1. Preparation of modified nanocellulose
[0091] 2 g of undried bleached softwood pulp, 0.025 g of TEMPO and 0.25 g of sodium bromide were dispersed in 150 ml of water. Subsequently, 2.86 g of a 13 wt% sodium hypochlorite solution was added so that 1 g of wood pulp corresponds to 2.5 mmol of sodium hypochlorite. During the reaction, 0.5M NaOH solution was added dropwise to keep the pH at 10.5. When the pH value no longer changes, the reaction is considered to have ended. After filtration of the reaction product, washing with sufficient water and repeated filtration for 5 times, centrifugal dehydration to obtain a modified fiber solution with a solid content of 25%. Subsequently, deionized water was added to the above modified fiber solution to prepare a 2 wt % modified fiber solution for ultrasonic dispersion. After mixing, the viscosit...
Embodiment 2
[0104] This embodiment provides a composite conductive paper and a preparation method thereof, which are basically the same as those in Embodiment 1, except that the types of inorganic micro-nano particles are different, and the steps are as follows:
[0105] S1. Preparation of modified nanocellulose
[0106] 2 g of undried bleached softwood pulp, 0.025 g of TEMPO and 0.25 g of sodium bromide were dispersed in 150 ml of water. Subsequently, 2.86 g of a 13 wt% sodium hypochlorite solution was added so that 1 g of wood pulp corresponds to 2.5 mmol of sodium hypochlorite. During the reaction, 0.5M NaOH solution was added dropwise to keep the pH at 10.5. When the pH value no longer changes, the reaction is considered to have ended. After filtration of the reaction product, washing with sufficient water and repeated filtration for 5 times, centrifugal dehydration to obtain a modified fiber solution with a solid content of 25%. Subsequently, deionized water was added to the above...
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