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Carbonized bacterial cellulose nano material for polypropylene modification

A technology of bacterial cellulose and bacterial cellulose film, applied in the field of polymer material preparation, can solve the problems of reduced mechanical properties of conductive composite materials, high cost of conductive composite materials, weak tensile and bending strength, etc., and achieves overcoming impact strength. Weak, low cost, overcoming the effect of material impact strength

Active Publication Date: 2015-09-02
龙岩市润峰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that because it is difficult for the conductive fillers to contact each other to form a conductive network, it is necessary to add a relatively large amount of conductive fillers to make the conductive composite material conductive. In this way, the mechanical properties of the conductive composite material will be reduced. Due to the high price of fillers such as graphene microflakes and carbon nanotubes, the cost of conductive composite materials is high
Nowadays, in the use of polypropylene (PP), more attention is paid to the impact resistance of the product, that is, the toughness of the material. Ordinary polypropylene is usually in the α crystal form, which is brittle and has weak impact resistance.
The β crystal form can effectively improve the toughness of the material, but the tensile and bending strengths are slightly weaker.

Method used

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  • Carbonized bacterial cellulose nano material for polypropylene modification
  • Carbonized bacterial cellulose nano material for polypropylene modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of carbonized bacterial cellulose nanomaterials for polypropylene modification:

[0028] S1. Soak the bacterial cellulose (BC) in distilled water, and then squeeze it to obtain a bacterial cellulose film (BC film);

[0029] S2. Soak the bacterial cellulose membrane (BC membrane) in 0.13 mol / L calcium acetate aqueous solution for 4 hours to obtain the bacterial cellulose membrane BCa absorbing the calcium acetate solution;

[0030] S3. Soak the bacterial cellulose membrane BCa in absolute ethanol for 2 hours until calcium acetate is precipitated and adsorbed on the surface of the bacterial cellulose membrane BCa to obtain the bacterial cellulose membrane BCb;

[0031] S4. Treat the bacterial cellulose membrane BCb under anaerobic conditions at 900°C for 4 hours to obtain a CBCb complex;

[0032] S5. Soak the CBCb complex in an ethanol solution with a concentration of 0.08 g / L pimelic acid for 2 hours, and heat to volatilize the ethanol to obtain carbonized b...

Embodiment 2

[0036] Preparation of carbonized bacterial cellulose nanomaterials for polypropylene modification:

[0037] S1. Soak the bacterial cellulose (BC) in distilled water, and then squeeze it to obtain a bacterial cellulose film (BC film);

[0038] S2. Soak the bacterial cellulose membrane (BC membrane) in 0.2 mol / L calcium acetate aqueous solution for 2 hours to obtain the bacterial cellulose membrane BCa that absorbs the calcium acetate solution;

[0039] S3. Soak the bacterial cellulose membrane BCa in absolute ethanol for 1 hour until calcium acetate is precipitated and adsorbed on the surface of the bacterial cellulose membrane BCa to obtain the bacterial cellulose membrane BCb;

[0040] S4. Treat the bacterial cellulose membrane BCb under anaerobic conditions at 900°C for 2 hours to obtain a CBCb complex;

[0041] S5. Soak the CBCb complex in an ethanol solution with a concentration of 0.16 g / L pimelic acid for 1 hour, and heat to volatilize the ethanol to obtain carbonized b...

Embodiment 3

[0045] Preparation of carbonized bacterial cellulose nanomaterials for polypropylene modification:

[0046] S1. Soak the bacterial cellulose (BC) in distilled water, and then squeeze it to obtain a bacterial cellulose film (BC film);

[0047] S2. Soak the bacterial cellulose membrane (BC membrane) in 0.13 mol / L calcium acetate aqueous solution for 4 hours to obtain the bacterial cellulose membrane BCa absorbing the calcium acetate solution;

[0048] S3. Soak the bacterial cellulose membrane BCa in absolute ethanol for 3 hours until calcium acetate is precipitated and adsorbed on the surface of the bacterial cellulose membrane BCa to obtain the bacterial cellulose membrane BCb;

[0049] S4. Treat the bacterial cellulose membrane BCb under anaerobic conditions at 900°C for 2 hours to obtain a CBCb complex;

[0050] S5. Soak the CBCb complex in an ethanol solution with a concentration of 0.24 g / L pimelic acid for 1 hour, and heat to volatilize the ethanol to obtain carbonized bact...

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Abstract

The invention relates to the field of high molecular material preparation, and particularly discloses a carbonized bacterial cellulose nano material for polypropylene modification and application thereof in preparing conducting composite materials. The nano material is prepared by the following steps: S1. immersing bacterial cellulose in distilled water, and extruding to obtain a bacterial cellulose membrane; S2. immersing the bacterial cellulose membrane in a calcium acetate water solution to obtain a bacterial cellulose membrane BCa; S3. immersing the bacterial cellulose membrane BCa in anhydrous ethanol to obtain a bacterial cellulose membrane BCb; S4. treating the bacterial cellulose membrane BCb at 800-1000 DEG C under oxygen-free conditions to obtain a CBCb composite; and S5. immersing the CBCb composite in a pimelic acid ethanol solution to obtain the carbonized bacterial cellulose nano material for polypropylene modification. The nano material has the advantages of low preparation cost and favorable conductivity, and has wide application prospects.

Description

technical field [0001] The invention relates to the field of polymer material preparation, in particular to a carbonized bacterial fiber for polypropylene modification [0002] prime nanomaterials. Background technique [0003] Bacterial cellulose (BC) is a friendly nanomaterial. Compared with plant cellulose, it does not contain associated products such as lignin and hemicellulose. It also has high crystallinity, high degree of polymerization, ultra-fine network structure, Due to its extremely high tensile strength and excellent biocompatibility, its application in medical materials, food, chemical industry and other fields has attracted widespread attention. As a new type of environmentally friendly material with excellent performance, the application of bacterial cellulose in composite materials has gradually been developed, and currently it is mainly focused on the following aspects: (1) Utilizing the excellent mechanical properties of bacterial cellulose to enhance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/14C08J5/18C08L1/02C08L23/12
Inventor 林志丹贺子芹冼嘉明黎明庆
Owner 龙岩市润峰科技有限公司