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Nanometer paper material and preparation method thereof

A nano-paper and polymer technology, applied in the field of nano-paper materials, can solve problems such as low efficiency, difficulty in controlling the thickness, density and surface morphology of nano-paper, and difficulty in large-scale production, achieving high strength and reproducible product quality Good performance and easy to promote

Inactive Publication Date: 2014-06-11
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method is extremely inefficient to prepare nano-paper by drying the filter cake after suction filtration, and it is difficult to realize large-scale production. shortcoming

Method used

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  • Nanometer paper material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Firstly, 0.8 g of polyvinyl alcohol (Mw 31,000~50,000, degree of alcoholysis 99%) was heated and dissolved in 100 mL of deionized water, and 15 g of montmorillonite was added and stirred at high speed until it became a homogeneous colloid. The product was stored at -78 °C (dry ice ethanol bath) was quickly frozen until the ice crystals grew completely, then vacuum freeze-dried at room temperature until completely dry, and finally the obtained low-density material was pressed into nanopaper with a pressure of 40 MPa.

Embodiment 2

[0026] First, add 1 g of montmorillonite into 100 mL of deionized water, stir at high speed until it becomes a uniform suspension, then heat and dissolve 20 g of polyvinyl alcohol (Mw 31,000~50,000, degree of alcoholysis 99%) into the above suspension, and dissolve The product was quickly frozen at -78 °C (dry ice ethanol bath) until the ice crystals grew completely, then vacuum freeze-dried at room temperature until completely dry, and finally the resulting low-density material was pressed into nanopaper with a pressure of 40 MPa.

Embodiment 3

[0028] Firstly, 10 g of polyvinyl alcohol (Mw 31,000~50,000, degree of alcoholysis 99%) was heated and dissolved in 100 mL of deionized water, and 5 g of cumulated clay was added and stirred at high speed until it became a homogeneous colloid. The product was stored at -78 °C (dry ice ethanol bath) was quickly frozen until the ice crystals grew completely, then vacuum freeze-dried at room temperature until completely dry, and finally the obtained low-density material was pressed into nanopaper with a pressure of 40 MPa. .

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Abstract

The invention provides a nanometer paper material and a preparation method thereof. Nanometer paper is prepared by blending a polymer and clay in a water solution, freeze-drying, and then, mechanically pressing the mixture, wherein the polymer contains 5-95% of nanometer paper, and the clay contains 95-5% of nanometer paper. As the nanometer paper material provided by the invention is prepared by taking the polymer and clay as raw materials, only water is adopted as a solvent in a preparation process, and the freeze-drying and mechanical pressing processes are adopted, so that the preparation processes are environment-friendly, and the production efficiency is high. The freeze-drying and mechanical pressing processes for preparing the nanometer paper material are more efficient, and the obtained material is smooth in surface, relatively high in strength, good in flame retardance and good in product quality repeatability. The preparation method is simple in process operation, low in cost and easy to popularize.

Description

technical field [0001] The invention belongs to the technical field of nano paper materials, and in particular relates to nano paper materials and a preparation method thereof. Background technique [0002] Nano paper is a new type of environmentally friendly material, which is mainly composed of polymers and nanoparticles. The traditional stone paper is compounded with calcium carbonate and common polymers, which is green and environmentally friendly, and shows great application prospects in the fields of traditional writing paper and decorative materials. However, the polymers used in this method are often thermoplastic general-purpose polymers such as polyethylene and polypropylene. These polymers are derived from fossil raw materials and are non-renewable resources. [0003] Liu Andong et al. from the Royal Swedish Institute of Technology used nano-microcrystalline cellulose and montmorillonite to blend the aqueous solution, and then dried by suction to obtain a cellulo...

Claims

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Application Information

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IPC IPC(8): D21H17/68D21H17/36
Inventor 陈洪兵宋宏涛黄玮曾光高小玲吴文昊
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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