Polysiloxane supramolecular elastomer with high mechanical properties and self-repairing function as well as preparation method and application thereof

A technology for supramolecular elastomers and mechanical properties, applied in the field of supramolecular elastomers and conductive elastomers, can solve problems such as low tensile strength, and achieve the effects of easy molding, strong practicability, and mild reaction conditions

Active Publication Date: 2020-12-11
SOUTH CHINA UNIV OF TECH
View PDF10 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tensile strength of the elastic materials prepared by the two is less than 1MPa, and the tensile toughness is less than 2MJ/m 3 (The tensile toughness value is estimated from the stress-strain curve reported in the patent), which will limit the application of polysiloxane elastomers in the actual environment
[0004] Chinese invention patent CN 102604298A discloses a preparation method of a polysiloxane elastic material with ultra-high self-healing efficiency...

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
  • Polysiloxane supramolecular elastomer with high mechanical properties and self-repairing function as well as preparation method and application thereof
  • Polysiloxane supramolecular elastomer with high mechanical properties and self-repairing function as well as preparation method and application thereof
  • Polysiloxane supramolecular elastomer with high mechanical properties and self-repairing function as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Add 6.73g of 1,6-hexamethylene diisocyanate (40.00mmol) in dichloromethane solution to the round bottom flask connected with mechanical stirring, reflux condenser and inert protection device, then add 90.00g of bis(3- aminopropyl) terminated polydimethylsiloxane (30.00mmol) in dichloromethane and 1.09g 2,6-diaminopyridine (10.00mmol) in dimethyl sulfoxide; their solid content is 20%. Raise the reaction temperature to 60° C., and react for 12 hours under the protection of nitrogen to obtain a polysiloxane block copolymer containing pyridine ligands. figure 2 Shown is the product polysiloxane block copolymer containing pyridine ligands (a) and starting material 1,6-hexamethylene diisocyanate (c), bis(3-aminopropyl) terminated polydimethylsiloxane (b), IR characterization of 2,6-diaminopyridine (d). It can be seen from the figure that Si-O-Si and Si-C peaks and pyridine ligand peaks are clearly observed in (a) (the position indicated by * in the figure), which show...

Embodiment 2

[0045] Except that 0.90g ferric chloride hexahydrate / dehydrated ethanol solution (3.33mmol) is replaced with 0.54g ferric chloride hexahydrate / dehydrated ethanol solution (2.00mmol) in step 2, all the other are identical with embodiment 1, and product is named after PDMS-HDA@Fe-1 / 5.

Embodiment 3

[0047] Except that 0.90g ferric chloride hexahydrate / dehydrated ethanol solution (3.33mmol) is replaced by 2.70g ferric chloride hexahydrate / dehydrated ethanol solution (10.00mmol) in step 2, all the other are identical with embodiment 1, and product is named after PDMS-HDA@Fe-1 / 1.

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

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Tensile toughnessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a polysiloxane supramolecular elastomer with high mechanical properties and a self-repairing function as well as a preparation method and application thereof. The preparation method comprises the following steps of: carrying out a reaction on bis (3-aminopropyl)-terminated polydimethylsiloxane, 1, 6-hexamethylene diisocyanate and 2, 6-diaminopyridine as raw materials to obtain a polysiloxane block copolymer containing a ligand; and dissolving the polysiloxane block copolymer containing the ligand, dropwise adding a metal salt solution to obtain a polysiloxane supramolecular elastomer, and carrying out hot press molding and cold press molding to obtain a target product. The method is simple and mild in condition; reversible metal coordination bonds/ion clusters formed by thepreparation method of the invention endow the polysiloxane supramolecular elastomer with the self-repairing function at a proper temperature while enhancing and toughening a polysiloxane supramolecular network. The prepared polysiloxane supramolecular elastomer has huge application value in a flexible substrate material of wearable equipment.

Description

technical field [0001] The invention belongs to the technical field of supramolecular elastomers and conductive elastomers, and in particular relates to a polysiloxane supramolecular elastomer with high mechanical performance (strong and tough) and self-repairing function and its preparation method and application. Background technique [0002] In recent years, with the popularization of electronic smart devices, wearable devices represented by smart watches, smart bracelets and earphones have appeared on the market. Wearable devices have increasing requirements for substrate materials, and the research on flexible substrate materials with excellent mechanical properties (strong and tough) and self-healing functions will also have more practical significance. Polysiloxane is very suitable as a substrate material for wearable devices due to its excellent biocompatibility, but it generally faces the following two problems: 1) Realizing high tensile strength and high tensile st...

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): C08L75/02C08K3/16C08G18/73C08G18/65C08G18/61C08G18/38C08G18/76
CPCC08G18/3844C08G18/61C08G18/6529C08G18/73C08G18/7671C08K3/16C08K2003/164C08K2003/168C08K2201/001C08L75/02
Inventor 陈玉坤范剑锋
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products