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A preparation method of a photoresponsive adhesive with strong adhesion under water and the prepared photoresponsive adhesive

A binder and adhesion technology, which is applied in the field of polymer materials, can solve problems such as poor adhesion, and achieve the effects of improved adhesion performance, excellent adhesion performance, and simple preparation methods

Active Publication Date: 2021-10-19
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vegetable oil has excellent hydrophobicity and has the potential to be used as an underwater adhesive material, but the simple vegetable oil-based adhesive has poor adhesion. Therefore, it is necessary to improve the existing vegetable oil-based adhesive

Method used

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  • A preparation method of a photoresponsive adhesive with strong adhesion under water and the prepared photoresponsive adhesive
  • A preparation method of a photoresponsive adhesive with strong adhesion under water and the prepared photoresponsive adhesive
  • A preparation method of a photoresponsive adhesive with strong adhesion under water and the prepared photoresponsive adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Preparation method of photoresponsive adhesive with strong adhesion under water, the preparation route is as follows figure 1 As shown, the degree of polymerization of the polymer is 600, m+2n=600, m is 420, n is 90, figure 1 The co represents the abbreviation of copolymerization.

[0056] Specifically include the following steps:

[0057] (1) Add 1.68mL epoxy camellia oil monomer (ECO) into the ampoule, add 291mg (TAc) thymine acrylate monomer and 300mg adenine acrylate monomer (AAc) to dissolve in 2.9mL N,N-di In methyl formamide (DMF); The structural formula of epoxy camellia oil monomer (ECO) is as follows in the present embodiment: ECO:AAc:TAc (molar ratio)=0.7:0.15:0.15 in the present embodiment, monomer AAc, The solid content of TAc and ECO is 45.8%, and the calculation method of solid content is: (0.291+0.300+1.68*1.024) / (2.9*0.945+0.291+0.300+1.68*1.024).

[0058] What adopt is that publication number is the epoxy camellia oil monomer of record in the pate...

Embodiment 2

[0061] Preparation method of photoresponsive adhesive with strong adhesion under water, the preparation route is as follows figure 1 As shown, the degree of polymerization of the polymer is 600, m+2n=600, m is 480, n is 60, figure 1 The co represents the abbreviation of copolymerization.

[0062] Specifically include the following steps:

[0063] (1) Measure 1.92mL ECO into the ampoule, add 194mg TAc and 200mg AAc and dissolve in 2.6mL DMF; The content is 49%, and the calculation method of the solid content is: (0.194+0.200+1.92*1.024) / (2.6*0.945+0.194+0.200+1.92*1.024).

[0064] (2) Prepare AIBN into 8.2 mg / mL DMF solution, add 200 μL into the ampoule in step (1), and seal the ampoule. After the mixed solution was subjected to multiple freeze-thaw cycles, it was reacted at 75° C. for 2 h under nitrogen gas. The obtained polymer was purified in methanol to obtain a light-responsive binder.

Embodiment 3

[0066] The difference between this example and Example 1 is that the molar ratio of ECO, AAc, and TAc is 0.9:0.05:0.05, and the solid content of AAc and TAc is 51.5%. correspond figure 1 m in is 540, and n is 30.

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Abstract

The invention discloses a preparation method of a light-responsive adhesive with strong adhesion under water, and relates to the technical field of polymer materials. The invention comprises the following steps: (1) mixing epoxy camellia oil monomer, thymine acrylic acid The ester monomer and adenine acrylate monomer are mixed and dissolved in a solvent, and then a polymerization initiator is added; (2) Freezing and thawing cycle removes oxygen, fills with nitrogen, reacts at 75°C for 2 hours, and purifies to obtain a photoresponsive underwater binder. The present invention also provides the photoresponsive adhesive prepared by the above preparation method. The beneficial effect of the present invention is that: the present invention uses a one-pot method to introduce hydrogen bonding between nucleobases, and on the basis of a simple preparation method, the prepared adhesive has more excellent adhesion properties, biocompatibility and Hydrophobic, its adhesion performance has been greatly improved, it can be applied to vegetable oil-based underwater adhesives, and the shear strength of the adhesive can be changed by adjusting the water temperature. At the same time, the adhesive prepared by the invention has photoresponsiveness.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for preparing a photoresponsive adhesive with strong adhesion under water and the prepared photoresponsive adhesive. Background technique [0002] Underwater adhesives are widely used in daily life, marine, medical and other fields. However, achieving strong underwater adhesion is challenging due to the difficulty in displacing the water of hydration from the adhesive interface. This hydrated water film layer severely prevents the intimate chemical contact between the adhesive and the substrate, and thus, the surface energy of the adherend, which provides the driving force for the adhesion, is greatly reduced. For example, widely used cyanoacrylate adhesives exhibit strong adhesion in air, but when applied in water environments, they harden rapidly, forming a hard plastic layer that eventually leads to loss of adhesion. Commercial epoxies and polyurethanes ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/36C09J133/14C08J3/28C08L33/14
CPCC08F220/36C08J3/28C08J2333/14C09J133/14C08F220/365
Inventor 华赞吴疆朱光宇关礼衡李建军汪钟凯
Owner ANHUI AGRICULTURAL UNIVERSITY
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