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Preparation method of high-transparency conductive polyurethane based on ionic-like liquid

An ionic liquid, high-transparency technology, used in conductive materials, conductive materials, and the measurement of properties of piezoresistive materials. It can solve problems such as restricting applications, and achieve good biocompatibility, low price, and stability. high effect

Pending Publication Date: 2021-08-03
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyurethane itself is an electrical insulator, which also limits its application in many fields.

Method used

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  • Preparation method of high-transparency conductive polyurethane based on ionic-like liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A kind of preparation method of the high-transparency conductive polyurethane based on class ionic liquid, its preparation steps are as follows:

[0052] Step 1: Under the action of DBTDL catalyst, PPG2000 isocyanate MDI-50 is prepared into long-chain polyurethane prepolymer.

[0053] Step 2: In an acetone solvent, the polyurethane prepolymer prepared in step 1 is reacted with HEMA under the action of a DBTDL catalyst, so that double bond groups are grafted on both sides of the prepolymer.

[0054] Step 3, ACH and HEMA are prepared into an ionic liquid containing a double bond group.

[0055] Step 4, mixing and stirring the prepared polyurethane prepolymer grafted with double bond groups on both sides and the ionic liquid containing double bond groups in absolute ethanol solvent.

[0056] In step 5, the mixture mixed in step 4 is passed through argon to remove oxygen.

[0057] Step 6, adding the peroxygen-free mixture into the initiator AIBN, placing it in the mold and ...

Embodiment 2

[0089] A kind of preparation method of the high-transparency conductive polyurethane based on class ionic liquid, its preparation steps are as follows:

[0090] Step 1, under the action of DBTDL catalyst, PPG2000 isocyanate MDI-50 is prepared into a long-chain polyurethane prepolymer;

[0091] Step 2, in an acetone solvent, react the polyurethane prepolymer prepared in step 1 with HEMA under the action of a DBTDL catalyst, so that double bond groups are grafted on both sides of the prepolymer;

[0092] Step 3, preparing ACH and HEMA into an ionic liquid containing a double bond group;

[0093] Step 4, mixing and stirring the prepared polyurethane prepolymer grafted with double bond groups on both sides with the ionic liquid containing double bond groups in an absolute ethanol solvent;

[0094] Step 5, the mixture mixed in step 4 is deoxygenated by argon;

[0095] Step 6, adding the peroxygen-free mixture into the initiator AIBN, placing it in the mold and heating to polymeri...

Embodiment

[0127] Next, examples of the present invention are shown in Table 1.

[0128] Table 1: Examples of Conductive Polyurethanes

[0129] example Example 1 Example 2 Example 3 Example 4 Example 5 DES ratio 1:2 1:2.4 1:2.8 1:3.2 1:3.6

[0130] In addition, the highly transparent conductive polyurethane prepared by the ionic liquid 1:2 in Example 1 has the best electrical conductivity and the worst mechanical properties, and the ionic liquid 1:2 is easy to crystallize at room temperature at the same time. Here comes the difficulty.

[0131] In addition, the highly transparent conductive polyurethane prepared from the ionic liquid 1:2.4 in Example 2 has slightly worse electrical conductivity than Example 1, and slightly improved mechanical properties. The prepared polyurethane has both electrical conductivity, transparency and mechanical properties.

[0132] In addition, the highly transparent conductive polyurethane prepared from the ionic liquid 1...

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Abstract

The invention provides a preparation method of high-transparency conductive polyurethane based on ionic liquid, the preparation method is characterized by comprising the following steps: step 1, preparing a polyurethane prepolymer with a long chain segment under the action of a catalyst; 2, in a solvent, grafting double-bond groups on the two sides of the polyurethane prepolymer prepared in the step 1 under the action of the catalyst; 3, preparing an ionic liquid containing a double-bond group; 4, mixing and stirring the prepared polyurethane prepolymer grafted with double-bond groups on two sides with the ionic liquid containing the double-bond groups in a solvent; 5, introducing gas to remove oxygen from the mixture mixed in the step 4; and 6, adding an initiator into the mixture without oxygen, and carrying out heating polymerization in a mold. The prepared high-transparency conductive polyurethane has good mechanical performance, can bear the pressure of 100 MPa without being damaged, also has good flexibility and can reach the standard of a wearable flexible sensor.

Description

technical field [0001] The invention relates to a preparation method of a high-transparency conductive polyurethane, in particular to a preparation method of a high-transparency conductive polyurethane based on an ionic liquid, and belongs to the field of functional polymer materials. Background technique [0002] Polyurethane is an important organic polymer material, known as the "fifth largest plastic", because of its high strength, good elasticity, wide range of hardness, and convenient molding, it is widely used in machinery, construction, automobile manufacturing, medicine, aerospace and other fields. be widely used. Polyurethane elastomers are multi-block copolymers composed of alternating "soft" polyether or polyester segments and "hard" polyurethane segments. The thermodynamic incompatibility of these segments and the crystallization of either or both segments will promote their microphase separation into hard and soft phases at temperatures below or above their gla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/34H01B1/12G01L1/18
CPCC08F283/008H01B1/122G01L1/18C08F220/34
Inventor 张馨月杨凯悦程皓鸽马宁魏浩王国军
Owner HARBIN ENG UNIV
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