Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of quasi-polyrotaxane film and quasi-polyrotaxane film prepared by same

A quasi-polyrotaxane and thin-film technology, applied in chemical instruments and methods, color-changing fluorescent materials, etc., to achieve the effects of simple operation of equipment, low price, and wide source of raw materials

Active Publication Date: 2021-12-10
EAST CHINA UNIV OF SCI & TECH
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there is no report on the use of polymers containing polycaprolactone segments and pillararenes containing azophenyl groups and their derivatives to construct pseudopolyrotaxanes and obtain photoresponsive supramolecular films by electrostatic spraying technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of quasi-polyrotaxane film and quasi-polyrotaxane film prepared by same
  • Preparation method of quasi-polyrotaxane film and quasi-polyrotaxane film prepared by same
  • Preparation method of quasi-polyrotaxane film and quasi-polyrotaxane film prepared by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A preparation method of a photoresponsive pseudopolyrotaxane film (SM1), comprising the following steps:

[0050] (1) Preparation of PCL polymer:

[0051] In a 250mL single-necked round bottom flask, add 0.41mL of benzyl alcohol, 0.2mL of stannous isooctanoate, 22.2mL of ε-CL (ε-caprolactone) and 100mL of dry toluene, and react at 100°C for 12h under the protection of nitrogen. . The solution obtained from the reaction was precipitated in refrigerated methanol, filtered with suction, and dried in vacuum at 30°C for 24 hours to obtain a linear PCL polymer. For its NMR characterization, see image 3 ;

[0052] (2) Preparation of P5-AZO:

[0053] Add 19.2mL of 1,4-dibromobutane, 18.4g of anhydrous potassium carbonate, catalytic amount of potassium iodide and 300mL of acetonitrile into a 500mL three-necked flask, heat to 80°C, and condense to reflux. Dissolve 10.0 g of 4-methoxyphenol in 50 mL of anhydrous acetonitrile, slowly drop it into the above-mentioned three-neck...

Embodiment 2～ Embodiment 11

[0064] The preparation method of the pseudopolyrotaxane film SM2-SM11 listed in table 1, its operating steps are basically the same as in Example 1, the difference is that the host molecule, the guest molecule, the solvent, temperature, host molecule and guest molecule for preparing the quasipolyrotaxane The feed ratio and / or the conditions of the electrostatic spray process are different. The main molecules are pillar aromatic hydrocarbons containing azobenzene and its derivatives, including P5-AZO, P5-AZO 2 、P5-AZO 5 、P5-AZO 10 or P5 2 -AZO; guest molecules include linear PCL and star S-PCL 4 . The specific experimental conditions are shown in Table 1:

[0065] Table 1

[0066]

[0067]

[0068] Among them, the star PCL polymer S-PCL 4 The preparation method is as follows:

[0069] In a 250mL single-necked round bottom flask, add 0.10mL of pentaerythritol, 0.2mL of stannous isooctanoate, 2.2mL of ε-CL and 100mL of dry toluene, and react at 100°C for 12h under t...

Embodiment 12

[0098] A preparation method of a photoresponsive pseudopolyrotaxane film (SM12), comprising the following steps:

[0099] (1) Preparation of PCL-PEG-PCL:

[0100] In a 250 mL single-necked round bottom flask, add 20.50 g of HO-PEG-OH, 0.2 mL of stannous isooctanoate, 22.83 g of ε-CL and 100 mL of dry toluene. Reacted for 24 h. The reaction solution was added to refrigerated methanol for precipitation, suction filtered, and vacuum-dried at 30°C for 24 h to obtain a triblock copolymer PCL-PEG-PCL, whose structural formula is as follows:

[0101]

[0102] (2) Preparation of PPR12:

[0103] Weigh 10.0 mg of PCL-PEG-PCL, 32.5 mg of P5-AZO and 1 mL of chloroform in a 2 mL sample bottle, and fully dissolve at 30 °C to form a pseudopolyrotaxane PPR12, whose structural formula is as follows Figure 9 shown.

[0104] (3) Preparation of light-controlled quasi-polyrotaxane film SM12:

[0105] Draw 1 mL of quasi-polyrotaxane solution with a syringe, and inject it at a speed of 5 mL...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a preparation method of a quasi-polyrotaxane film and a polyrotaxane film prepared thereof. The preparation method comprises the steps that S1, a polymer containing a polycaprolactone chain segment serves as a guest molecule, pillararene containing an azobenzene group serves as a host molecule, the guest molecule and the host molecule are fully dissolved in an organic solvent at the temperature of 0-50 DEG C according to the molar ratio of 1: (1-1000), and a quasi-polyrotaxane solution is formed; and S2, the quasi-polyrotaxane solution is sprayed at the speed of 0.2-60 mL / h through an injection pump by adopting an electrostatic spraying technology under the conditions that the voltage is 5-40 KV, the receiving distance is 5-30 cm and the humidity is 50% RH to 90% RH, so as to obtain the quasi-polyrotaxane film. According to the method, raw materials are easy to obtain, the cost is low, operation is easy, the requirement for equipment is low, and repeated writing and erasing of information on the film can be achieved through color changes caused by light responsiveness of azobenzene groups in the quasi-polyrotaxane film.

Description

technical field [0001] The invention relates to a photoresponsive functional film, in particular to a method for preparing a pseudopolyrotaxane film and the prepared pseudopolyrotaxane film. Background technique [0002] At present, the sources of raw materials for the preparation of responsive films are limited, such as titanium alloy memory materials, platinum-rhodium alloy sensor materials and other raw materials are expensive, and it is difficult to achieve large-scale mass production. Most of the existing preparation methods, including vapor deposition polymer method, polycondensation method, and layer-by-layer self-assembly method, have the disadvantages of cumbersome operation and high equipment requirements. This makes responsive thin films face great challenges in preparation technology, and it is difficult to achieve simple and convenient large-scale preparation. [0003] Pseudopolyrotaxane (Progress in Polymer Science, 2014, 39, 1043) is a supramolecular system i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08J5/18C08G83/00C09K9/02C08L87/00
CPCC08J5/18C08G83/007C09K9/02C08J2387/00
Inventor 林绍梁王赫陈健壮李进杰董锦辉靳海宝刘彬秀解方茹朱伶蓉
Owner EAST CHINA UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com