A kind of polyoxymethylene/polylactic acid SERS polymer substrate and its preparation method and application

A polymer and polyoxymethylene technology, applied in textiles and papermaking, instruments, analytical materials, etc., can solve the problems of low sensitivity and poor repeatability, and achieve the effect of stable phase structure

Active Publication Date: 2019-08-02
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to provide a polyoxymethylene / polylactic acid SERS substrate in order to avoid the problems of low sensitivity and poor repeatability in SERS detection

Method used

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  • A kind of polyoxymethylene/polylactic acid SERS polymer substrate and its preparation method and application
  • A kind of polyoxymethylene/polylactic acid SERS polymer substrate and its preparation method and application
  • A kind of polyoxymethylene/polylactic acid SERS polymer substrate and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: Preparation of polyoxymethylene / polylactic acid SERS polymer substrate containing gold nanoparticles:

[0037] (1) Preparation of polyoxymethylene / polylactic acid polymer film by melt blending

[0038] POM and PLLA were weighed in a weight ratio of 50:50, then poured into a Haake mixer, and melted and blended at 190°C. The specific experimental operation is as follows: the raw materials are first mixed at a premixing speed of 20rpm for 2min, and then mixed at a speed of 50rpm for 5min; the blend is taken out and placed on a flat vulcanizer at 190°C. After the sample is fully melted, heat it at 40MPa. Press for 3 minutes; then quickly transfer to a flat vulcanizer at room temperature and cold press for 1 minute at 40 MPa; prepare a sample sheet with a thickness of about 50 μm. The temperature of the sample is controlled by a hot stage, and the film of the above-mentioned sample fingers is rapidly heated to 190°C for 10 minutes to eliminate the thermal hist...

Embodiment 2

[0043] Embodiment 2: Preparation of polyoxymethylene / polylactic acid SERS polymer substrate containing nano-silver:

[0044] (1) Preparation of polyoxymethylene / polylactic acid polymer film by melt blending

[0045] POM and PLLA were weighed in a weight ratio of 70:30, then poured into a Haake mixer, and melted and blended at 190°C. The specific experimental operation is as follows: the raw materials are first mixed at a premixing speed of 20rpm for 2min, and then mixed at a speed of 50rpm for 5min; the blend is taken out and placed on a flat vulcanizer at 190°C. After the sample is fully melted, heat it at 40MPa. Press for 3 minutes; then quickly transfer to a flat vulcanizer at room temperature and cold press for 1 minute at 40 MPa; prepare a sample sheet with a thickness of about 50 μm. The temperature of the sample is controlled by a hot stage, and the film of the above-mentioned sample finger is rapidly heated to 190°C for 10 minutes to eliminate the heat history, and th...

Embodiment 3

[0050] Embodiment 3: Preparation of polyoxymethylene / polylactic acid SERS polymer substrate containing gold nanoparticles:

[0051] (1) Preparation of polyoxymethylene / polylactic acid polymer film by melt blending

[0052] POM and PLLA were weighed in a weight ratio of 50:50, then poured into a Haake mixer, and melted and blended at 190°C. The specific experimental operation is as follows: the raw materials are first mixed at a premixing speed of 20rpm for 2min, and then mixed at a speed of 50rpm for 5min; the blend is taken out and placed on a flat vulcanizer at 190°C. After the sample is fully melted, heat it at 40MPa. Press for 3 minutes; then quickly transfer to a flat vulcanizer at room temperature and cold press for 1 minute at 40 MPa; prepare a sample sheet with a thickness of about 50 μm. The temperature of the sample is controlled by a hot stage, and the film of the above-mentioned sample finger is rapidly heated to 190°C for 10 minutes to eliminate the thermal histo...

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Abstract

The invention discloses a polyoxymethylene / polylactic acid (POM / PLLA) SERS polymer substrate and its preparation method and use. The POM / PLLA SERS polymer substrate comprises a POM / PLLA composite film and metal nanoparticles carried by the surface of the POM / PLLA composite film. The POM / PLLA composite film has a micron-order spherocrystal structure. After an aminolysis reaction, the ring-banded spherulitic structure has nanoscale holes. The POM / PLLA melt blended film and an amino group modifier undergo a reaction so that an amino functional group is introduced and simultaneously, POM / PLLA blended film porous formation is realized. The POM / PLLA SERS polymer substrate can be used in rhodamine 6G and glucose detection. Compared with the existing detection limit, the sensitivity of the polymer substrate is high and the rhodamine 6G detection limit of the polymer substrate can reach 10-19mol / L.

Description

technical field [0001] The invention relates to a polyoxymethylene / polylactic acid SERS polymer substrate and a preparation method thereof, which have high sensitivity, repeatability and stability. Background technique [0002] Surface-enhanced Raman Scattering (SERS) technology can provide molecular vibration information of trace chemical substances. It has great application potential and value in biological monitoring. Since gold (Au), silver (Ag) and other surface plasmons can excite and enhance the local electromagnetic field strength around their structures in the visible light region, causing the Raman scattering intensity of molecules on or near the surface to increase, they are widely used in SERS substrates. In preparation. For example, the chemical reduction method is used to directly prepare nano-Au, Ag particles, nano-sheets, nano-columns, nano-wires, etc. of different sizes or shapes, or the chemical assembly method is used to assemble Au nanoparticles on vari...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/83D04H3/005D04H3/03G01N21/65D06M101/32D06M101/30
CPCD04H3/005D04H3/03D06M11/83D06M2101/30D06M2101/32G01N21/658
Inventor 梁媛媛李勇进林传信翁毕伟
Owner HANGZHOU NORMAL UNIVERSITY
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