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Manufacturing method and application of flexible SERS sensor used for detecting bisphenol A

A sensor and flexible technology, applied in the field of analytical chemistry, can solve the problems of increasing the detection cost of bisphenol A, weak interaction, and long detection time, and achieve the effects of easy industrial mass production, simple preparation process, and strong adsorption capacity

Inactive Publication Date: 2019-04-16
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can provide accurate detection results but also have many disadvantages, for example, the equipment is expensive and takes up a lot of space, the samples need cumbersome pretreatment, the detection time is long, or professional technicians are required to operate the equipment, etc.
Surface-enhanced Raman spectroscopy (SERS) is a fast, sensitive, and simple detection method, which is widely used in biological detection and food analysis, and is also used in the field of bisphenol A detection, but due to the interaction between bisphenol A and the technical SERS substrate Weak, it is necessary to modify the surface of the SERS substrate, such as using DNA fragments or antigen antibodies, etc., which will increase the detection cost of bisphenol A, and the SERS substrate after surface modification is not easy to preserve

Method used

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  • Manufacturing method and application of flexible SERS sensor used for detecting bisphenol A
  • Manufacturing method and application of flexible SERS sensor used for detecting bisphenol A
  • Manufacturing method and application of flexible SERS sensor used for detecting bisphenol A

Examples

Experimental program
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Effect test

Embodiment 1

[0027] After drying the deinked recycled pulp fibers at 70°C for 12 hours, weigh 200 g of dried deinked recycled pulp fibers and add them to 50 mL of 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), Use a glass rod to stir and dissolve the pulp fiber in a water bath at 80°C, transfer the dissolved colloidal pulp fiber to the spinning equipment container, and use a spinning nozzle with 18 holes (30um in diameter) to spin the dissolved cellulose, The spinning speed is set at 20-30 m / min, and the regenerated cellulose fibers are obtained by cooling the silk exit with a 15°C water bath, and the fibers are naturally dried for later use.

[0028] The raw material used for the fiber is recycled waste paper, which is an environmentally friendly route.

[0029] Weigh 1g of fiber, immerse in 15 mL of twice-distilled water, add 2g of KOH and 5 mL of glycidyltrimethylammonium chloride (GTAC) to this system in turn, after KOH is completely dissolved, rotate the mixer (30 rpm) mixed for 20 minutes,...

Embodiment 2

[0038] The method is the same as in Example 1. The difference is: in step (4), the target solution is a beverage solution containing bisphenol A, and the concentration of bisphenol A is 0.1, 0.2, 2, 20ppb.

[0039] Establish Raman spectral information that increases proportionally with the concentration of bisphenol A, such as Figure 10 shown.

[0040] In summary, the present invention has designed and prepared a flexible fiber SERS sensor for detecting bisphenol A. This new type of flexible cellulose fiber SERS sensor (regenerated cellulose fiber-Ag nanocomposite) is used as a bisphenol A detection material. It has strong ability, no surface functional molecular modification, high sensitivity, low cost, simple preparation process, easy industrial mass production, and can achieve the purpose of rapid and in-situ detection of bisphenol A.

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Abstract

The invention discloses the manufacturing method and the application of a flexible SERS sensor used for detecting bisphenol A and belongs to the analytical chemistry technology field. The method comprises the following steps of (1) through waste paper regeneration, preparing a cellulose fiber; (2) carrying out cellulosic fiber surface modification; (3) preparing a flexible fiber-silver SERS substrate; and (4) carrying out bisphenol A detection in plastic bottled drink: using the cellulosic fiber regenerated from waste paper as a flexible substrate, processing the fiber under an alkaline condition so that a surface has positive charges and a porous structure is formed, and electrostatically assembling silver nanoparticles to a fiber surface so as to obtain a flexible SERS substrate. The diameter of the flexible SERS substrate changes significantly under re-drying and wetting conditions, which creates more SERS hot spots and has a sample capture capability. And the rapid adsorption and the detection of bisphenol A in the plastic bottled drink can be realized.

Description

technical field [0001] The invention belongs to the technical field of analytical chemistry, and relates to a sensor of regenerated cellulose fiber, surface modification, silver nanoparticles, interface self-assembly, flexible composite material and a preparation method thereof. Background technique [0002] Bisphenol A (BPA) is widely used as an industrial raw material and additive in the production of some important polymers, such as industrial flame retardants, plastics, and polycarbonates. Food packaging, plastic beverage bottles, disposable tableware, baby bottles, etc. in daily life may contain bisphenol A. Bisphenol A is a kind of endocrine disrupting compound (EDCs), which will stimulate the skin, trachea, cornea and other organs after contact with the human body. After ingestion, bisphenol A will affect the endocrine system and cause harm to the health of humans and animals. Studies have shown that infants and young children will be poisoned by ingesting BPA during...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 孔宪明郝少娴喻倩刘晴钱沅
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY