Latex material modified by composite material composed of melanin and graphene and preparation method thereof

A composite material and graphene technology, applied in the field of melanin and graphene-modified latex materials and their preparation, can solve the problems of limited improvement of the physical properties of composite materials, poor dispersion level, complicated processes, etc., and achieve excellent mechanical properties. performance, good dispersion, and the effect of broadening the application field

Inactive Publication Date: 2020-10-27
中科悦达(上海)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

In the latex industry, research on the compounding of traditional nano-reinforced particles such as carbon black, white carbon black, and clay has been widely carried out, and latex nanocomposites with excellent performance have been developed, so that the performance of latex nanocomposites has also been improved to a certain level. However, according to the current research results, due to the poor dispersion level, easy aggregation and sedimentation, the effect of improving the physical properties of composite materials is limited, and the process is complicated and the stability is poor.

Method used

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  • Latex material modified by composite material composed of melanin and graphene and preparation method thereof
  • Latex material modified by composite material composed of melanin and graphene and preparation method thereof
  • Latex material modified by composite material composed of melanin and graphene and preparation method thereof

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Embodiment 1

[0096] The latex modified by the composite material composed of melanin and graphene in the present embodiment consists of the following components:

[0097]

[0098] The latex preparation method of the composite material modification of the melanin of the present embodiment and graphene composition is as follows:

[0099] 1.1 Extraction method of melanin in squid ink sac: refer to the preparation method section of Yang Wang, u et al., literature name: Superior Performance of Polyurethane Based on Natural Melanin Nanoparticles, Biomacromolecules, 2016, 17(11), 3782-3789.

[0100] 1.2 Preparation of composite materials composed of melanin and graphene

[0101] Disperse 0.5 g of dispersant polyvinylpyrrolidone into 1 kg of deionized water, then add graphene oxide to configure about 1 L of 3 mg / ml graphene oxide aqueous suspension, wherein the graphene oxide carbon / oxygen ratio is 6, and the sheet diameter is 800 nm. Then add silane coupling agent KH550 for sanding treatment;...

Embodiment 2

[0115] The latex modified by the composite material composed of melanin and graphene in the present embodiment consists of the following components:

[0116]

[0117] The latex preparation method of the composite material modification of the melanin of the present embodiment and graphene composition is as follows:

[0118] 2.1 Extraction of black rice melanin

[0119] The extraction method comprises the following steps: (1) extracting the crude melanin: weighing an appropriate amount of black rice, washing it with clear water, and putting it into a round bottom flask; Reflux extraction in water bath at 60°C (please add) for 2 hours each time. Extract twice according to this condition, combine the two extracts, filter and adjust the pH of the extract to 10 with dilute NaOH solution, let it stand for 24 hours to make it fully precipitate, after vacuum distillation and concentration, heat water to wash away starch and salts, After filtration under reduced pressure, the melan...

Embodiment 3

[0133] The latex modified by the composite material composed of melanin and graphene in the present embodiment consists of the following components:

[0134]

[0135]

[0136] The latex preparation method of the composite material modification of the melanin of the present embodiment and graphene composition is as follows:

[0137] 3.3 Preparation of polydopamine melanin

[0138] Polysemiamine hydrochloride solution (2g / L) uses theophylline as a pH regulator, adjusts its pH value to 8-9, heats up to 60-80°C, reacts for 8 hours, and obtains brownish yellow particles after cooling, centrifuges, Washed with water, vacuum dried more semiamine melanin.

[0139] 3.2 Preparation of composite materials composed of melanin and graphene

[0140] Disperse 0.5g of dispersant polyvinylpyrrolidone into 1kg of deionized water, then add graphene oxide to configure about 1L of 2.5mg / ml graphene oxide aqueous suspension, wherein graphene oxide has a carbon / oxygen ratio of 6 and a sheet ...

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Abstract

The invention provides a latex material modified by a composite material composed of melanin and graphene, a preparation method and application thereof. The latex material modified by a composite material composed of melanin and graphene comprises the following components by weight: 60-100 parts of latex, 1-6 parts of the composite material composed of melanin and graphene, 0.1-0.5 part of a coupling agent, 0.2-1 part of a stabilizer and 0.1-0.8 part of a surfactant, wherein the mass ratio of melanin to graphene in the composite material composed of melanin and graphene is 1:1-10. According tothe modified latex material disclosed by the invention, the latex is modified by the melanin and the graphene material, and the modified latex material has excellent mechanical properties and excellent tensile resistance and resilience; and meanwhile, the strength, tear resistance, mite prevention, bacteriostasis, far infrared, ultraviolet resistance, oxidation resistance and other properties ofthe material are enhanced. Moreover, the preparation method is simple in process and easy for large-scale production.

Description

technical field [0001] The invention relates to a latex material, more specifically to a latex material modified by melanin and graphene, a preparation method and application thereof. Background technique [0002] Latex products have excellent properties such as elasticity, tactility, wearability, plasticity, and biological properties, and are widely used in industry, agriculture, medical care, military industry, culture and sports, and daily life. However, ordinary latex products are susceptible to air oxidation, have poor durability and aging resistance, and have a high damage rate. At the same time, latex products are often in contact with the skin of the human body. The latex products here only have a simple barrier effect, and they cannot protect against germs. and bacteria, so the existing latex products cannot adapt to the pace of the development of modern society. Therefore, in terms of physical and mechanical properties such as hardness and tensile strength of pure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08K13/06C08K9/04C08K9/06C08K3/04C08K5/00C08K3/06C08K3/22
CPCC08K13/06C08K9/04C08K9/06C08K3/042C08K5/0041C08K3/06C08K3/22C08L2201/08C08K2003/2296
Inventor 周建李久荣丁古巧
Owner 中科悦达(上海)材料科技有限公司
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