Method for preparing nano-crystalline cellulose of flexible screen matrix material

Abstract

The present invention discloses a method for preparing the nano-crystalline cellulose of a flexible screen matrix material. According to the preparation method, the bagasse unbleached pulp and the chitosan are adopted as raw materials. The bagasse unbleached pulp is dissolved and dispersed in water to prepare a suspension liquid. A mixed acid is then added in the suspension liquid. After the reaction process, a high-crystallinity suspension liquid is prepared. After the centrifugation process, solid matters are washed, and then are processed by a high-pressure ultrasonic homogenizer to obtain a nano-crystalline cellulose crystal suspension slurry. The potassium periodate is added into the suspension slurry for oxidation treatment to obtain a modified nano-crystalline cellulose suspension slurry. The chitosan material is treated with acetic acid at a low temperature to prepare a chitosan saturated solution. After the ultrasonic atomization freezing treatment, the nano-scale chitosan is prepared. The nano-scale chitosan and the modified nano-crystalline cellulose suspension slurry are subjected to the mixed crosslinking treatment to prepare the composite nano-crystalline cellulose. The two materials of the method, namely the bagasse unbleached pulp and the chitosan, are abundant, easy to obtain and good in biodegradability. Therefore, the environmental protection and the waste treatment are facilitated. The prepared composite nano-crystalline cellulose can be used for manufacturing the flexible screen matrix material.

Description

technical field [0001] The invention belongs to the technical field of high-value utilization of lignocellulosic raw materials, in particular to a method for preparing nanocellulose used in flexible screen matrix materials. Background technique [0002] Compared with traditional screens, flexible screens (OLEDs) have the advantages of lighter volume, lower power consumption, longer battery life, and higher durability. The successful mass production of flexible screens will have a profound impact on the development of a new generation of high-end smartphones and wearable devices. According to IHS' report "Flexible Display Technology and Market Forecast", global shipments of flexible displays are expected to increase to 792 million units in 2020, up from 3.2 million units in 2013. Overall operating income will soar from a measly $100,000 to $41.3 billion over the same period. [0003] The screen substrate is a key part in the production of flexible screens, and has high requ...

AI Technical Summary

Problems solved by technology

At present, the OLED substrates that have been successfully researched still have several shortcomings such as efficiency, lifespan, process operability and cost.

In addition, traditional flexible screen substrates need to be heated at ultra-high temperatures during the production process or contain certain toxic substances, and after being discarded, they are stored in the natural environment and degrade very slowly, requiring more than tens of thousands of years. Subsequent recycling requires industrial degradation