Preparation method of regenerated cellulose/graphene oxide composite modified fibers with thermoplastic processing performance

A graphene composite, regenerated cellulose technology, applied in the chemical characteristics of fibers, conductive/antistatic filament manufacturing, rayon manufacturing and other directions, can solve the problems of poor thermal stability of cellulose, limited blending thermoplastic processing, etc. Enhanced wearing comfort, improved electrical conductivity, and enhanced strength

Active Publication Date: 2018-10-26
南通荣荟新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of poor thermal stability of cellulose, thermal decomposition at high temperature, and no obvious melting transition temperature, which limits the thermoplastic processing of its blend with hydrophobic thermoplastic materials, the application field of regenerated cellulose is broadened through process design

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 A preparation method of regenerated cellulose / graphene oxide composite modified fiber with thermoplastic processability

[0031] Step 1 Preparation of cellulose lysate

[0032] Mix cellulose and DMAC (analytically pure) at a mass ratio of 1:9, heat to 157°C and keep it warm for 30 minutes, filter it dry, add it to the DMAC / LiCL dissolution system, keep it at 100°C for 2 hours, and form a A homogeneous cellulose solution of 7.5% cellulose;

[0033] The cellulose is broken into 3-5mm cellulose after impurity removal, degreasing, bleaching and drying, with a degree of polymerization of 500 and a cellulose content of 92%;

[0034] In the DMAC / LiCL dissolution system, the content of DMAC is 91%, and the content of LiCL is 9%.

[0035] Step 2 Preparation of graphene oxide dispersion

[0036] Disperse graphene oxide in water, add a dispersant, and in constant temperature water at 60°C, after ultrasonication for 6 hours, configure a 5% graphene oxide aqueous disper...

Embodiment 2

[0050] Example 2 A preparation method of regenerated cellulose / graphene oxide composite modified fiber with thermoplastic processability

[0051] Step 1 Preparation of cellulose lysate

[0052] Mix cellulose and DMAC (analytical pure) in a mass ratio of 1:9.5, heat to 163°C and keep warm for 40 minutes, filter and dry, add to DMAC / LiCL dissolution system, keep warm at 97°C for 2.5 hours, and form a A homogeneous cellulose solution of 7% cellulose;

[0053] The cellulose is broken into 3-5mm cellulose after impurity removal, degreasing, bleaching and drying, with a degree of polymerization of 700 and a cellulose content of 95%;

[0054] In the DMAC / LiCL dissolution system, the content of DMAC is 91%, and the content of LiCL is 9%.

[0055] Step 2 Preparation of graphene oxide dispersion

[0056] Disperse graphene oxide in water, add a dispersant, and in constant temperature water at 62°C, after ultrasonication for 7 hours, configure a 5% graphene oxide aqueous dispersion.

...

Embodiment 3

[0070] Example 3 A preparation method of regenerated cellulose / graphene oxide composite modified fiber with thermoplastic processability

[0071] Step 1 Preparation of cellulose lysate

[0072] Mix cellulose and DMAC (analytically pure) in a mass ratio of 1:10, heat to 163°C and keep warm for 40 minutes, filter and dry, add to DMAC / LiCL dissolution system, keep warm at 103°C for 3 hours, and form a A homogeneous cellulose solution of 6% cellulose;

[0073] The cellulose is broken into 3-5mm cellulose after impurity removal, degreasing, bleaching and drying, the degree of polymerization is 600, and the first cellulose is 95%;

[0074] In the DMAC / LiCL dissolution system, the content of DMAC is 91%, and the content of LiCL is 9%.

[0075] Step 2 Preparation of graphene oxide dispersion

[0076] Disperse graphene oxide in water, add a dispersant, and in constant temperature water at 65°C, after ultrasonication for 8 hours, configure a 5% graphene oxide aqueous dispersion.

[...

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PUM

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Abstract

The invention provides a preparation method of regenerated cellulose / graphene oxide composite modified fibers with thermoplastic processing performance. The preparation method is characterized by comprising the following steps: preparing a cellulose solution, preparing a graphene oxide dispersion solution, preparing cellulose / graphene oxide gel, preparing a cellulose / graphene oxide composite powder material, processing master batch and spinning. The fiber electric conductivity of the prepared fibers is 2.4*10<4> S / m or above and the dry strength of the fibers is 5.8 to 6.5 cN / detx. The preparation of the cellulose solution comprises the steps of mixing cellulose and DMAC (Dimethylacetamide), carrying out first-time heating, dissolving after draining and carrying out second-time heating; the obtained cellulose solution contains 6 to 7.5 percent of alpha cellulose.

Description

technical field [0001] The technical category of the invention belongs to the modification processing of thermoplastic fiber-forming high polymer by compounding cellulose / graphene oxide. Background technique [0002] Cellulose materials have the advantages of environmental friendliness, biocompatibility, renewable resources, excellent mechanical properties, hydrophilicity and skin affinity, and occupy an important position in textile and clothing materials. But at the same time, because the cellulose material contains a large number of active hydroxyl groups, has good hydrophilicity, and has poor thermal stability, thermal decomposition occurs at high temperature, and there is no obvious melting transition temperature, which limits its blending with hydrophobic thermoplastic materials. processing, and with the depletion of petroleum resources, most of the thermoplastic fiber-forming high polymer materials derived from petroleum processing by-products need to find a renewable...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/10D01F1/09D01F6/90
CPCD01F1/09D01F1/10D01F6/90D01F6/92
Inventor 刘逸新李明华
Owner 南通荣荟新材料科技有限公司
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