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A Method for Detecting the Spatial Distribution of Nanoparticles in Photopolymers Using Raman Imaging

A technology of photopolymers and nanoparticles, applied in Raman scattering, material analysis through optical means, measurement devices, etc., can solve problems such as limitations, lack, and insufficient understanding of photophysical and photochemical mechanisms, and achieve good holography Kinetics, enhanced stability effects

Active Publication Date: 2020-10-02
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, people do not understand the photophysical and photochemical mechanisms involved in the photochemical kinetics of photopolymers doped with nanoparticles. It is impossible to avoid the charge transfer between nanoparticles and photosensitizer, which will affect the process of monomer polymerization.
In addition, few people have studied the diffusion of nanoparticles and the diffusion of monomers. For this system, the study of multicomponent diffusion dynamics is even less
The crux of the problem is that people lack effective methods to study the distribution of nanoparticles in photopolymer species, which limits people's in-depth understanding of the photochemical dynamics process. Therefore, it is urgent to develop a method to detect the spatial distribution of nanoparticles in photopolymers. Methods

Method used

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  • A Method for Detecting the Spatial Distribution of Nanoparticles in Photopolymers Using Raman Imaging
  • A Method for Detecting the Spatial Distribution of Nanoparticles in Photopolymers Using Raman Imaging
  • A Method for Detecting the Spatial Distribution of Nanoparticles in Photopolymers Using Raman Imaging

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Embodiment 1

[0035] A method for detecting the spatial distribution of nanoparticles in photopolymers using Raman imaging technology, the steps are as follows:

[0036] (1) Au-MBA-SiO 2 Preparation of nanoparticles:

[0037] Take 240 ul of p-mercaptobenzoic acid solution with a concentration of 20mM and add it to 30ml of fresh gold colloid solution with an average particle size of about 15±3nm, stir until evenly mixed, and keep warm at 60°C for 12 hours to complete the p-mercaptobenzoic acid solution on the surface of gold nanoparticles. Molecular adsorption process. Then, the solution was placed in a round bottom flask, 0.4 ml of 1 mmol / L 3-aminopropyltrimethoxysilane aqueous solution was added and stirred for 10 min. Add 3.0 ml of 0.54% sodium silicate aqueous solution and continue stirring for 5 min. Then the reaction solution was placed in a water bath at 90 degrees to heat the reaction for 1 h, and then the reaction was terminated and cooled to room temperature to prepare Au-MBA-Si...

Embodiment 2

[0049] A method for detecting the spatial distribution of nanoparticles in photopolymers using Raman imaging technology, the steps are as follows:

[0050] (1) Au-MBA-SiO 2 Preparation of nanoparticles:

[0051] Take 240 ul of p-mercaptobenzoic acid solution with a concentration of 25mM and add it to 30ml of fresh gold colloid solution with an average particle size of about 20±3nm, stir until evenly mixed, and keep warm at 65°C for 18 hours to complete the p-mercaptobenzoic acid solution on the surface of gold nanoparticles. Molecular adsorption process. Then, the solution was placed in a round bottom flask, 0.6ml of 1.5mmol / L 3-aminopropyltrimethoxysilane aqueous solution was added and stirred for 15 min. Add 3.5 ml of 0.45% sodium silicate aqueous solution and continue stirring for 10 min. Then the reaction solution was placed in a water bath at 95 degrees to heat the reaction for 1.5h, and then the reaction was terminated and cooled to room temperature to obtain Au-MBA-S...

Embodiment 3

[0063] A method for detecting the spatial distribution of nanoparticles in photopolymers using Raman imaging technology, the steps are as follows:

[0064] (1) Au-MBA-SiO 2 Preparation of nanoparticles:

[0065] Take 300 ul of p-mercaptobenzoic acid solution with a concentration of 23mM and add it to 30ml of fresh gold colloid solution with an average particle size of about 20±3nm, stir until evenly mixed, and keep warm at 70°C for 16 hours to complete the p-mercaptobenzoic acid solution on the surface of gold nanoparticles. Molecular adsorption process. Then, the solution was placed in a round bottom flask, 0.6ml of 3mmol / L 3-aminopropyltrimethoxysilane aqueous solution was added and stirred for 15 min. Add 3.2 ml of 0.38% sodium silicate aqueous solution and continue stirring for 10 min. Then the reaction solution was placed in a water bath at 95 degrees to heat the reaction for 2h, and then the reaction was terminated and cooled to room temperature to prepare Au-MBA-SiO ...

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Abstract

The invention provides a method for detecting the spatial distribution of nano particles in a photopolymer by using a Raman imaging technology. A nano composite material is added into a photopolymer system and holographic exposure is performed; a Raman spectrometer is used for performing a mapping imaging test to acquire a Raman image of P-sulfhydryl benzoic acid molecules, and thus the spatial distribution condition of the nano particles is acquired. The nano composite material is a nucleus-molecule-shell nano composite material using gold as a shell, silicon dioxide as a shell, and a P-sulfhydryl benzoic acid molecule layer at the middle. According to the method provided by the invention, the problem that in holographic storage, people do not know the distribution condition of the particles after the photopolymer of the nano particles is holographically exposed is solved, the charge transfer occurring between the photosensitizer and the nano particles is effectively isolated, and thepeople is assisted to learn the holographic dynamics better.

Description

technical field [0001] The invention relates to the fields of nanomaterials, holographic gratings and Raman spectroscopy, in particular to a method for detecting the spatial distribution of nanoparticles in photopolymers using Raman imaging technology. Background technique [0002] Photopolymer is the most promising and first practical material for digital holographic storage. In order to improve its holographic recording performance, people usually dope it with inorganic nanoparticles. The mastery of the mechanism is beneficial to optimize the chemical composition and digital holographic recording performance of materials. However, people do not understand the photophysical and photochemical mechanisms involved in the photochemical kinetics of photopolymers doped with nanoparticles. The charge transfer between the nanoparticles and the photosensitizer cannot be avoided in this method, which will affect the polymerization process of the monomer. In addition, few people hav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 付玉洲李若平黄明举韩俊鹤刘军辉
Owner HENAN UNIVERSITY
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