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Graphene composite polyvinyl alcohol masterbatch and its preparation method, application, fiber material

A technology of graphene composite and polyvinyl alcohol mother, which is applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, rayon manufacturing, etc., can solve the problems of interlayer agglomeration, affecting related properties, and uneven particle size

Active Publication Date: 2018-09-21
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there are many related products related to polyvinyl alcohol-graphene composites. In view of its wide application, polyvinyl alcohol-graphene is generally made into functional masterbatches, which is convenient for transportation, storage, and It is convenient for subsequent applications, and then according to actual needs, functional masterbatches are used as raw materials to make related products. From this, it is found that the performance of the functional masterbatch itself will directly affect the related performance of subsequent products, but generally produced The graphene content in the functional masterbatch will be relatively low, and the graphene particles will be unevenly dispersed, the particle size will be uneven, and interlayer agglomeration will easily occur. In this way, the stress concentration points caused by graphene materials with different sheet diameters will easily occur. The problem of fracture affects the performance of subsequent products

Method used

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  • Graphene composite polyvinyl alcohol masterbatch and its preparation method, application, fiber material
  • Graphene composite polyvinyl alcohol masterbatch and its preparation method, application, fiber material
  • Graphene composite polyvinyl alcohol masterbatch and its preparation method, application, fiber material

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Effect test

Embodiment 1

[0052] The preparation method of high-performance graphene composite polyvinyl alcohol masterbatch is as follows:

[0053] 1) Add graphene oxide to the water, and ultrasonically disperse to obtain a stable dispersion. The suspension is centrifuged at 2000rpm for the first time, the centrifugation time is 20min to remove the bottom sediment, and the supernatant is centrifuged for the second time at 5000rpm. , The centrifugation time is 10 minutes to obtain the secondary bottom sediment, and the secondary bottom sediment is ultrasonicated with water to obtain 1.5wt% graded graphene oxide sol;

[0054] 2) Premix the graphene oxide sol solution with a concentration of 1.5wt% and a PVA aqueous solution with a concentration of 5wt% (the degree of polymerization is 1700, the degree of alcoholysis is 99%) to obtain a premix, and the premix is ​​mixed with 10wt. % PVA aqueous solution was mixed again (polymerization degree was 2500, alcoholysis degree was 88%), stirred at 90°C for 1 h, and ...

Embodiment 2

[0057] The difference from Example 1 is that in step 1), the bottom sediment obtained by the first centrifugation at 3000 rpm is selected, and water is added to ultrasonically to obtain a 2wt% graded graphene oxide sol solution. In the resulting mixed solution, the concentration of PVA is 16wt% Evaporating the solvent and drying to obtain a functional masterbatch with a graphene oxide content of 1.5 wt%, and the graphene-like substance has a D90 of 70 μm and a D10 of 3.5 μm.

Embodiment 3

[0059] The difference from Example 1 is that in step 1), the secondary supernatant after the supernatant is centrifuged again at 7000 rpm is used to prepare a 3wt% graded graphene oxide sol, and the resulting mixed solution , The concentration of PVA is 15wt%, and the solvent is evaporated and dried to obtain a functional masterbatch with a graphene oxide content of 1.5wt%, and the graphene-based substance has a D90 of 30 μm and a D10 of 5 μm.

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Abstract

The invention provides a graphene-compounded PVA (polyvinyl alcohol) master batch with high performance. The graphene-compounded PVA master batch mainly consists of a graphene matter and PVA, wherein the content of graphene matter is less than 6wt% in the graphene-compounded PVA master batch; the D90 index of the graphene matter is controlled to be less than 100mu m, the D10 index is controlled to be less than 20mu m, and the D90 index is controlled to be less than 20 times of D10 index. A preparation method of the graphene-compounded PVA master batch comprises the following steps of (A) pretreating a graphene matter water solution, so as to obtain a graphene matter particle size graded water solution; (B) mixing and stirring the PVA water solution and the graphene matter particle size graded water solution, so as to obtain a mixing solution; drying, so as to obtain the graphene-compounded PVA master batch. The graphene-compounded PVA master batch has the advantage that although the content is higher, the graphene particles are uniformly dispersed, the particle size is also uniform, and production of any agglomerated particle is avoided.

Description

Technical field [0001] The invention relates to the field of processing and preparation of polyvinyl alcohol masterbatch, in particular to a high-performance graphene composite polyvinyl alcohol masterbatch, a preparation method and application thereof, and a fiber material. Background technique [0002] Polyvinyl alcohol (PVA) is a water-soluble high molecular polymer, its molecular formula is [C 2 H 4 O]n. Polyvinyl alcohol fiber can be used as a reinforcing material for plastics, cement, ceramics, etc. because of its good hydrophilicity, impact resistance, and good dispersibility during molding. It can also replace asbestos with carcinogens. [0003] Graphene is a two-dimensional material with a honeycomb structure composed of a single layer of sp2 hybridized carbon atoms, which has many excellent properties. Since its discovery in 2004, graphene has become a major research hotspot in the scientific community. While studying the physical and chemical properties of graphene, co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/04C08L29/04D01F6/50D01F1/10
CPCC08K3/04C08L2203/12D01F1/10D01F6/50C08L29/04
Inventor 唐一林张金柱张安王文平刘顶
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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