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Microbial cellulose membrane/nanometer noble metal composite material, preparation method and applications thereof

A microbial cellulose and composite material technology is applied in the field of microbial cellulose film/nano precious metal composite material and its preparation, and achieves the effects of safe preparation process, cheap raw materials, and good surface-enhanced Raman scattering effect.

Inactive Publication Date: 2020-01-10
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of microbial cellulose membranes to prepare flexible SERS substrates has not been reported.

Method used

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  • Microbial cellulose membrane/nanometer noble metal composite material, preparation method and applications thereof
  • Microbial cellulose membrane/nanometer noble metal composite material, preparation method and applications thereof
  • Microbial cellulose membrane/nanometer noble metal composite material, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] S1. Soak the microbial cellulose membrane with a thickness of 1mm, which is synthesized by Acetobacter fermentation, in 0.5% sodium hydroxide solution, treat it at 100°C for 2h, and then soak it in deionized water at 100°C for 2h, this step Repeat once to remove impurities in the microbial cellulose membrane. Then use deionized water to shake repeatedly until the cleaning solution is neutral;

[0038] S2. Soak the S1 purified microbial cellulose membrane in a 0.01mol / L silver nitrate solution, and soak for 12 hours at 30°C in the dark;

[0039] S3. Separate the microbial cellulose membrane soaked in S2, rinse the surface 5 times with deionized water to remove the unbound silver ions, and then soak the microbial cellulose membrane in a 0.05mol / L glucose solution. Soak in dark at 30℃ for 48h;

[0040] S4. Separate the microbial cellulose membrane soaked in S3, and wash with deionized water until the cleaning solution does not contain silver ions;

[0041] S5. The S4 treated mic...

Embodiment 2

[0047] S1. Soak the microbial cellulose membrane with a thickness of 1mm, which is synthesized by Acetobacter fermentation, in 0.5% sodium hydroxide solution, treat it at 100°C for 2h, and then soak it in deionized water at 100°C for 2h, this step Repeat once to remove impurities in the microbial cellulose membrane. Then use deionized water to shake repeatedly until the cleaning solution is neutral;

[0048] S2. Soak the S1 purified microbial cellulose membrane in a 0.1mol / L silver nitrate solution, and soak it in the dark at 40℃ for 6h;

[0049] S3. Separate the microbial cellulose membrane soaked in S2, wash the surface with deionized water 5 times to remove the unbound silver ions, and then soak the microbial cellulose membrane in 0.2mol / L glucose solution. Soak in dark at 60℃ for 24h;

[0050] S4. Separate the microbial cellulose membrane soaked in S3, and wash with deionized water until the cleaning solution does not contain silver ions;

[0051] S5. The S4 treated microbial ce...

Embodiment 3

[0053] S1. Soak the microbial cellulose membrane with a thickness of 1mm, which is synthesized by Acetobacter fermentation, in 0.5% sodium hydroxide solution, treat it at 100°C for 2h, and then soak it in deionized water at 100°C for 2h, this step Repeat once to remove impurities in the microbial cellulose membrane. Then use deionized water to shake repeatedly until the cleaning solution is neutral;

[0054] S2. Soak the S1 purified microbial cellulose membrane in a 0.05mol / L silver nitrate solution, and soak for 12 hours at 50°C in the dark;

[0055] S3. Separate the microbial cellulose membrane soaked in S2, rinse the surface with deionized water 5 times to remove the unbound silver ions, and then soak the microbial cellulose membrane in 0.1 mol / L glucose solution. Soak in dark at 40℃ for 36h;

[0056] S4. Separate the microbial cellulose membrane soaked in S3, and wash with deionized water until the cleaning solution does not contain silver ions;

[0057] S5. The S4 treated micro...

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Abstract

The invention discloses a microbial cellulose membrane / nanometer noble metal composite material, a preparation method and applications thereof. According to the invention, nanometer noble metal particles grow in situ in the nano-fiber network structure of a microbial cellulose membrane through a noble metal salt and a reducing agent, the growth of the noble metal particles is limited by utilizingthe superfine three-dimensional network-like structure of the microbial cellulose membrane to uniformly distribute the formed nanometer noble metal particles in the nano-scale holes of the microbial cellulose membrane and adhere the nanometer noble metal particles to the fiber bundles, and finally dehydrating drying treatment is performed to obtain the surface-enhanced Raman scattering substrate with good surface-enhanced Raman spectrum scattering effect; the preparation method has characteristics of simple preparation process, mild conditions, simple operation and inexpensive raw materials; and the prepared material can be used as the surface enhanced Raman substrate for rapid detection of protein biomacromolecules, and has good application prospects.

Description

Technical field [0001] The invention relates to the technical field of spectroscopy analysis and detection, and more specifically, to a microbial cellulose membrane / nano precious metal composite material with surface enhanced Raman scattering effect for protein detection, and a preparation method and application thereof. Background technique [0002] Raman spectrum is a kind of scattering spectrum, which was discovered in 1982 by Indian physicist Raman C.V. The Raman frequency shift measured by Raman spectroscopy is a physical quantity that characterizes the vibration-rotational energy level characteristics of the molecules of a substance. Through the Raman spectroscopy analysis of the substance, it is possible to understand the structure, characteristics and change laws of the substance at the molecular level. Therefore, Raman spectroscopy is widely used in various fields. Protein is an important component that maintains the normal life activities of organisms, and it has impor...

Claims

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Application Information

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IPC IPC(8): C08J7/12G01N21/65C08L1/02
CPCC08J7/12C08J2301/02G01N21/65
Inventor 李健鹏杨立群张黎明
Owner SUN YAT SEN UNIV
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