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Preparation method and application of temperature response material SiO2-poly(N-isopropyl acrylamide)

A technology of propylacrylamide and methylenebisacrylamide, which is applied in the field of preparation of temperature-responsive materials, can solve the problems of high toxicity, high cost, and complicated preparation process, and achieve low toxicity, low cost, and wide sources Effect

Active Publication Date: 2014-09-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of high raw material cost, complex preparation process and high toxicity of the existing materials used to prepare underwater oil drop transportation, and provides a temperature responsive material SiO 2 -Preparation method and application of polyisopropylacrylamide

Method used

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  • Preparation method and application of temperature response material SiO2-poly(N-isopropyl acrylamide)
  • Preparation method and application of temperature response material SiO2-poly(N-isopropyl acrylamide)
  • Preparation method and application of temperature response material SiO2-poly(N-isopropyl acrylamide)

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specific Embodiment approach 1

[0016] Specific implementation mode 1: The temperature-responsive material SiO in this embodiment mode 2 -The preparation method of polyisopropylacrylamide is carried out as follows:

[0017] 1. SiO 2 The nanoparticles are ultrasonically dispersed in deionized water, the ultrasonic frequency is 100 Hz to 500 Hz, and the ultrasonic time is 20 min to 80 min to obtain a dispersed solution; the SiO 2 The ratio of the quality of nanoparticles to the volume of deionized water is 0.05g: (10-300) mL; the SiO 2 The particle size of nanoparticles is 50nm~2000nm;

[0018] 2. Add concentrated HNO to the dispersed solution obtained in step 1 3 , N,N-methylenebisacrylamide crosslinking agent and isopropylacrylamide monomer, and then under the protection of inert gas, at a temperature of 45-55°C and a stirring speed of 150r / min-800r / min Stir for 20min to 60min; the concentrated HNO described in step 2 3 The volume of the SiO as described in step one 2 The ratio of the mass of nanoparti...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the SiO described in step one 2 The ratio of the mass of nanoparticles to the volume of deionized water is 0.05g:25mL. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0023]Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in Step 2, stir for 30 min at a temperature of 50° C. and a stirring speed of 200 r / min. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a preparation method and application of temperature response material and discloses a preparation method and application of a temperature response material SiO2-poly(N-isopropyl acrylamide), for solving the problems of the traditional method for preparing an underwater oil drop delivering substance that the raw material cost is high, the preparation process is high and the toxicity of an obtained substance is high. The preparation method comprises the following steps of: 1, ultrasonically dispersing SiO2 nano-particles into deionized water; 2, sequentially adding concentrated HNO3, an N,N-methylene bisacrylamide cross-linking agent and an isopropyl acrylamide monomer, and then stirring under the protection of an inert gas; 3, sequentially adding an ammonium ceric nitrate initiating agent and N,N,N',N'-tetramethylenediamine under the protection of the inert gas to obtain the temperature response material SiO2-poly(N-isopropyl acrylamide). The temperature response material SiO2-poly(N-isopropyl acrylamide) is applied to the delivery of an underwater organic solvent. The preparation method disclosed by the invention has the advantages of low raw material cost, low toxicity, simple and easy operation.

Description

technical field [0001] The invention relates to a preparation method and application of a temperature responsive material. Background technique [0002] The manipulation of underwater oil droplets has a wide range of applications in chemical reactions, biological analysis, transport without loss of mass, and oil-water separation. However, the existing underwater oil droplet transportation technology generally has problems such as complex equipment required, high cost, low efficiency of oil droplet transportation, and inaccurate transportation of tiny droplets, which hinders the development of underwater droplet transportation. In recent years, smart nanocomposites, which have developed rapidly in recent years, have attracted extensive attention in droplet transport due to their simple preparation methods, strong versatility, and low cost. Polyisopropylacrylamide (PNIPAm) is a kind of intelligent polymer with temperature response characteristics, which can change the molecul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/54C08F222/38
Inventor 潘钦敏楚盈
Owner HARBIN INST OF TECH