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Nano particle for polymer turbidity standard substance and preparation method thereof

A standard substance and nanoparticle technology, applied in the direction of scattering characteristic measurement, transmittance measurement, etc., can solve problems such as poor stability, achieve good stability, improve stability, and slow particle settling speed

Active Publication Date: 2018-07-17
BEIJING HAIAN HONGMENG STANDARD SUSNCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a polymer turbidity standard substance with nanoparticles and a preparation method thereof to solve the problem of poor stability of the current low turbidity value polymer turbidity standard substance

Method used

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  • Nano particle for polymer turbidity standard substance and preparation method thereof
  • Nano particle for polymer turbidity standard substance and preparation method thereof
  • Nano particle for polymer turbidity standard substance and preparation method thereof

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preparation example Construction

[0052] figure 1 It is a flow chart of the preparation method of nanoparticles for polymer turbidity standard substance according to the embodiment of the present invention. like figure 1 As shown, the method includes the following steps:

[0053] Step S100, providing latex particles.

[0054] Among them, the latex particles can be directly obtained by purchasing, or can be prepared by polymerization.

[0055] Step S200, performing surface modification treatment on the latex particles.

[0056] The purpose of the modification is to modify the surface of the latex particles with high-density negative or positive charges.

[0057] In step S100, the method for preparing the latex particles by polymerization comprises the following steps, such as figure 2 Shown:

[0058] Step S110, adding deionized water, sodium bicarbonate, styrene, and divinylbenzene into the reaction vessel.

[0059] Step S120, raising the temperature to 70-85°C, and keeping the temperature constant.

[0...

Embodiment 1

[0086] Embodiment 1, polymer turbidity standard substance is used nanoparticle (particle diameter 100nm)

[0087] A nano particle for a polymer turbidity standard substance is a monodisperse cross-linked polystyrene latex particle with a particle diameter of 100nm, the surface of the particle is modified with high-density positive charges, and the Zeta potential is 40mV-60mV.

[0088] The preparation method of the nanoparticles for the above-mentioned polymer turbidity standard substance comprises the following steps:

[0089] (1) Preparation of latex particles

[0090] 2500 mL of deionized water, 1.63 g of sodium bicarbonate, 180 g of styrene, and 27 g of divinylbenzene were added to the reaction vessel.

[0091] The temperature was raised to 75°C and maintained at this temperature.

[0092] 2.66 g of sodium p-styrene sulfonate and 0.81 g of potassium persulfate were sequentially added.

[0093] Adjust the stirring speed to 200r / min, and stir for 22h.

[0094] The latex p...

Embodiment 2

[0101] Embodiment 2, polymer turbidity standard substance is used nanoparticle (particle diameter 300nm)

[0102] A nanoparticle for a polymer turbidity standard substance is a monodisperse cross-linked polystyrene latex particle with a particle diameter of 300nm, the particle surface is modified with high-density negative charges, and the Zeta potential is -60mV to -40mV.

[0103] The preparation method of the nanoparticles for the above-mentioned polymer turbidity standard substance comprises the following steps:

[0104] (1) Preparation of latex particles

[0105] 1800 mL of deionized water, 1.22 g of sodium bicarbonate, 240 g of styrene, and 32 g of divinylbenzene were added to the reaction vessel.

[0106] The temperature was raised to 83°C and maintained at this temperature.

[0107] 0.77 g of sodium p-styrenesulfonate and 1.34 g of potassium persulfate were sequentially added.

[0108] Adjust the stirring speed to 150r / min, and stir for 16h.

[0109] The latex parti...

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Abstract

The invention provides a nano particle for a polymer turbidity standard substance and a preparation method thereof. The nano particle is a monodisperse crosslinked polystyrene latex particle having aparticle diameter of 100-500 nm, the monodispersity is good (PDI<0.1), the sphericity is high, and the surface is modified with high-density like charges. The preparation method of the nano particle includes the step of conducting surface modification treatment on latex particles prepared by polymerization reaction. By adopting the nano particle to prepare low-turbidity (<=100 NTU) polymer turbidity standard solution, the stability is good, the storage period is long, there is no need for refrigeration, and the transportation and use are convenient.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a nanoparticle for a polymer turbidity standard substance and a preparation method thereof. Background technique [0002] Turbidity is the degree of turbidity of a transparent medium. In water quality monitoring, food and beverage, sanitation and epidemic prevention, medicine, energy and other industries, the amount of insoluble suspended particulate matter contained in water is limited, and the main technical parameter indicating the amount is turbidity. A turbidimeter is an instrument used to measure turbidity. The turbidity meter needs calibration before leaving the factory, regular verification is required during use, calibration curves need to be drawn during on-site measurement, and turbidity standard substances are required as measurement standards for the assessment and comparison of turbidity measurement levels between different laboratories in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F212/36C08F212/14C08F8/36C08F8/42G01N21/49G01N21/59
CPCC08F8/36C08F8/42C08F212/08G01N21/49G01N21/59C08F212/36C08F212/14
Inventor 刘艳丽杜兴科慕建洲窦晓亮李蕴翔李银
Owner BEIJING HAIAN HONGMENG STANDARD SUSNCE TECH
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