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Nano-cellulose fibril /PBAT film and preparation method and application thereof

A technology of nanocellulose and plant cellulose, which is applied in the direction of fiber processing, fiber raw materials, plant fibers, etc., to achieve the effect of expanding the scope of application, good water resistance, and expanding the application system

Active Publication Date: 2020-11-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the preparation of nanocellulose fibrils / PBAT composite films by mechanical modification

Method used

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  • Nano-cellulose fibril /PBAT film and preparation method and application thereof
  • Nano-cellulose fibril /PBAT film and preparation method and application thereof
  • Nano-cellulose fibril /PBAT film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of nano cellulose fibril / PBAT film, its preparation method is as follows:

[0039] (1) Soak 50g of softwood pulp in a mixed solution (0.5mol / L buffer) of citric acid and sodium hydroxide molar ratio of 0.3:1 for 12h, then take it out and wash it with distilled water until it is neutral, then wash it with distilled water Prepared as a 2% pulp suspension.

[0040] (2) getting the mass fraction that obtains in step (1) is 2.5L of pulp suspension liquid of 2%, carries out pulverizing process with superfine particle pulverizer (Japan Zengxing Industrial Co., Ltd., model: MKCA6-2J), and the rotating speed is 2000r / min, the gap is -10 μm, and the cyclic crushing treatment is performed 10 times to obtain nanocellulose fibrils in an aqueous dispersion system.

[0041] (3) Get the nanocellulose fibrils of the water dispersion system prepared in step (2) and use tetrahydrofuran to carry out centrifugal washing, then be mixed with the nanocellulose fibril tetrahydrofuran s...

Embodiment 2

[0044] A kind of nano cellulose fibril / PBAT film, its preparation method is as follows:

[0045] (1) Soak 50g of softwood pulp in a mixed solution (0.5mol / L buffer solution) with a molar ratio of citric acid and sodium hydroxide of 1:1 for 36h, then take it out and wash it with distilled water until it is neutral, then wash it with distilled water Prepared as a 2% pulp suspension.

[0046](2) getting the mass fraction obtained in step (1) is 2.5L of pulp suspension of 2%, carry out pulverization process with ultrafine particle pulverizer, rotating speed is 5000r / min, gap is-20μm, circulation pulverization process 20 times, obtain Nanocellulose fibrils in aqueous dispersions.

[0047] (3) get the nanocellulose fibrils of the water dispersion system prepared in step (2) and use dichloromethane to carry out centrifugal washing, then be mixed with the nanocellulose fibrils dichloromethane solution that the mass fraction is 5%, get 100g, Use 2g of acetic anhydride at 25°C for 24 ...

Embodiment 3

[0050] A kind of nano cellulose fibril / PBAT film, its preparation method is as follows:

[0051] (1) Soak 200g of softwood pulp in a mixed solution of citric acid and sodium hydroxide with a molar ratio of 1:1 (0.5mol / L buffer solution) for 48h, then take it out and wash it with distilled water until it is neutral, and then wash it with distilled water Prepared as a 5% pulp suspension.

[0052] (2) Get the mass fraction that obtains in the step (1) and be 5% pulp suspension 2.5L, carry out pulverization process with ultrafine particle pulverizer, rotating speed is 1000r / min, and gap is-10 μm, circulation pulverization process 10 times, obtain Nanocellulose fibrils in aqueous dispersions.

[0053] (3) Get the nanocellulose fibrils of the water dispersion system prepared in step (2) and use acetone to carry out centrifugal washing, then be mixed with the nanocellulose fibril acetone solution that the mass fraction is 5%, get 20g, use 1g isosulfur The cyanate compound is modifi...

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Abstract

The invention discloses a nano cellulose fibril / PBAT film and a preparation method and application thereof. The preparation method of the nano cellulose fibril / PBAT film comprises the following steps:(1) soaking and washing plant cellulose paper pulp in a buffer solution to prepare a plant cellulose paper pulp suspension I; (2) then crushing by adopting an ultrafine particle crusher to obtain nano cellulose fibrils of a water dispersion system; (3) carrying out centrifugal washing by using an organic solvent, then carrying out modification treatment, and then washing to prepare an organic solution; and (4) finally mixing with PABT, and preparing the nano cellulose fibril / PABT composite film by a tape casting method. According to the invention, the nano cellulose fibrils are prepared by asimple mechanical method, the nano cellulose fibril / PBAT composite film is prepared by modification treatment, and the nano cellulose fibril / PBAT composite film has good biodegradability and mechanical properties, and is simple to operate. The film has potential application value in packaging and agriculture.

Description

technical field [0001] The invention belongs to the application field of nano-cellulose fibrils, and in particular relates to a nano-cellulose fibril / PBAT film and a preparation method and application thereof. Background technique [0002] Plastic products are widely used in various fields due to their excellent product performance. However, the non-degradable characteristics of their products have also led to serious environmental pollution, resulting in a large amount of "white pollution". With the development and progress of social science and technology, People's demand for environmentally friendly film materials is becoming more and more urgent. Polybutylene adipate / terephthalate (PBAT), a petroleum-based polymer product, has both the flexibility of the alkyl chain and the aromatic chain. Rigidity, as a biodegradable plastic, its importance is becoming more and more prominent. However, its relatively expensive price and low mechanical strength limit its application ran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L1/02C08J5/18D06M13/513D06M13/188D06M13/395D06M15/55D21B1/34D06M101/06
CPCC08J5/18D06M13/513D06M13/188D06M13/395D06M15/55D06M13/1845D21B1/345C08J2367/02C08J2401/02D06M2101/06Y02W90/10
Inventor 莫立焕史蓝洁李军廖健明张希
Owner SOUTH CHINA UNIV OF TECH
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