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Nanocellulose enhanced full-biodegradable thin film and preparation method thereof

A nanocellulose and degradable film technology, applied in flat products, other household appliances, applications, etc., can solve the problems of poor air permeability, insignificant enhancement effect, and low material strength of biodegradable films, and achieve smooth appearance and simple method. Easy to operate, good flexibility

Active Publication Date: 2015-04-01
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material strength of the fully degradable film is generally low, and it cannot be applied in many fields, and it needs to be strengthened.
[0006] Biodegradable films are usually prepared with starch, cellulose, lignin and other substances as fillers, and acrylic copolymers, polypropylene (PP), polystyrene (PS), vinyl monomer copolymers, etc. as reinforcing agents. , such as Chinese patents CN102604139A and CN103866487A; this kind of film is decomposed by microorganisms only the biologically active substances added to it, but the polymer itself is not decomposed, so that the final degradation result is that the polymer changes from a large piece or a whole piece to a small piece , fragments, which are not conducive to recycling, and cause more problems to the environment; in addition, the existing biodegradable films usually need to add reinforcing agents, and at present more plant fibers are used as reinforcing agents, such as Chinese patent CN101434735A, however The enhancement effect is not obvious; in addition, the vacuum defoaming method is often used in the preparation of biodegradable films, such as Chinese patent CN102604139A, but the biodegradable films prepared by this method have poor air permeability and low strength

Method used

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  • Nanocellulose enhanced full-biodegradable thin film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The fully biodegradable film reinforced by nanocellulose is carried out by casting method, and the specific steps are as follows:

[0059] (1) Pour 30g of deionized water into a 100mL beaker and heat it to 60°C. Slowly add 6 parts by weight of nanocrystalline cellulose (NCC), 24 parts by weight of gelatin and 0.4 part of ethanol defoamer in parts by weight, until forming nanocellulose aqueous phase colloid;

[0060] (2) Add 0.5 part by weight of xanthan gum gel and 0.01 part by weight of potassium chloride coagulant in the nanocellulose aqueous phase colloid obtained in step (1), fully mix and obtain Gel mixture containing nanocellulose;

[0061] (3) add by weight 0.4 part of glycerol plasticizer, 0.7 part of xylitol dispersant and 0.4 part of genipin crosslinking agent in the gel mixed solution containing nanocellulose that step (2) obtains, fully Mix to obtain a uniform pre-crosslinking mixture;

[0062] (4) After weighing the uniform pre-crosslinked mixed solution...

Embodiment 2

[0078] The fully biodegradable film reinforced by nanocellulose is carried out by casting method, and the specific steps are as follows:

[0079] (1) Pour 30g of deionized water into a 100mL beaker and heat it to 60°C. Slowly add 15 parts by weight of nanocrystalline cellulose (NCC), 50 parts by weight of gelatin and 1.5 parts of ethanol defoamer in parts by weight, until forming nanocellulose aqueous phase colloid;

[0080] (2) Add 1.5 parts by weight of xanthan gum gel and 0.15 parts by weight of potassium chloride coagulant in the nanocellulose aqueous phase colloid obtained in step (1), fully mix to obtain Gel mixture containing nanocellulose;

[0081] (3) add by weight 1.5 parts of glycerol plasticizers, 3.5 parts of xylitol dispersants and 1.2 parts of genipin crosslinking agents in the gel mixed solution containing nanocellulose obtained in step (2), fully Mix to obtain a uniform pre-crosslinking mixture;

[0082] (4) After weighing the uniform pre-crosslinked mixed ...

Embodiment 3

[0088] The fully biodegradable film reinforced by nanocellulose is carried out by casting method, and the specific steps are as follows:

[0089] (1) Pour 30g of deionized water into a 100mL beaker, and heat it to 60°C, slowly add 50 parts by weight of nanocrystalline cellulose (NCC), 100 parts by weight of gelatin and 9.37 parts of ethanol defoamer in parts by weight, until forming nanocellulose aqueous phase colloid;

[0090] (2) Add 12.5 parts by weight of xanthan gum gel and 0.15 parts by weight of potassium chloride coagulant in the nano-cellulose aqueous phase colloid obtained in step (1), fully mix and obtain Gel mixture containing nanocellulose;

[0091] (3) add by weight 10.5 parts of glycerol plasticizers, 5.5 parts of xylitol dispersants and 1.2 parts of genipin crosslinking agents in the gel mixed solution containing nanocellulose that step (2) obtains, fully Mix to obtain a uniform pre-crosslinking mixture;

[0092] (4) After weighing the uniform pre-crosslinki...

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Abstract

The invention relates to a nanocellulose enhanced full-biodegradable thin film and a preparation method thereof. The nanocellulose enhanced full-biodegradable thin film is prepared from the biodegrade nanocellulose as an enhancer and accessories such as a gel, a coagulant aid, a plasticizer, a defoamer, a dispersant and a cross-linking agent by virtue of the processes of mixing, defoaming, curtain coating, drying and the like. The obtained thin film is full-biodegradable, better in enhancement effect and environment-friendly.

Description

technical field [0001] The invention relates to a fully biodegradable film and a preparation method thereof, in particular to a nanocellulose-reinforced fully biodegradable film and a preparation method thereof. Background technique [0002] Degradable film means that it has the same effect as the corresponding ordinary film within a certain period of use, but after completing the service period of a certain function, or after being discarded far from reaching the service life, under specific environmental conditions, A type of thin film whose physical and chemical structure has undergone major changes, and can be rapidly and automatically decomposed and assimilated by the natural environment. [0003] Commonly used degradable films mainly include the following categories: (1) biodegradable films: these films can be degraded by naturally occurring microorganisms; (2) photodegradable films: these films can be sensitized by introducing light into the reagent (3) Photo / biodegr...

Claims

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Application Information

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IPC IPC(8): C08L89/00C08L5/00C08L5/04C08L1/02C08L1/08C08K13/02C08K5/1539C08K5/098C08K3/16C08K5/053C08K5/1545C08J3/24C08J5/18B29D7/01
Inventor 查瑞涛蒋兴宇张雅佩陈翊平
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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