Self-diagnosis and self-repair intelligent coating based on microfluidic technology and preparation method thereof

Patent metadata

Field	Value
Publication number	US-2026008927-A1
Application number	US-202519243216-A
Country	US
Kind code	A1
Filing date	Jun 19, 2025
Priority date	Jul 8, 2024
Publication date	Jan 8, 2026
Grant date	—

Abstract

A self-diagnosis and self-repair intelligent coating based on microfluidic technology and a preparation method thereof are provided. Microcapsules are prepared by combining microfluidic T-junction and interfacial polymerization. The wall material of the microcapsules is made of polyurea, and the core material is made of diagnostic agent, repair agent and photoinitiator. Self-diagnosis and self-repair microcapsules are evenly distributed in the coating with silicone resin as matrix.

First claim

1 . A self-diagnosis and self-repair intelligent coating based on microfluidic technology, wherein the coating is made from a composition comprising microcapsules and a resin matrix;
the microcapsules consist of a shell material and coating materials; the shell material is polyurea; the coating materials are a repair agent, a diagnostic agent and a photoinitiator; the repair agent is 1,3-bis(3-glycidyl propyl)-1,1,3,3-tetramethyldisiloxane; the diagnostic agent is rhodamine B; the photoinitiator is triarylsulfonium hexafluorophosphate; and the resin matrix is a mixture of self-drying silicone resin and silane coupling agent with a mass ratio of 20:1; and a mass content of the microcapsules in the composition is 11.1-14.3%.

2 .- 6 . (canceled)

7 . A preparation method of the self-diagnosis and self-repair intelligent coating based on the microfluidic technology according to claim 1 , the preparation method comprising:
using the microfluidic technology, pumping a dispersed phase solution and a continuous phase solution into polytetrafluoroethylene tube 1 and polytetrafluoroethylene tube 2 in a microfluidic chip respectively; in the chip, cutting the dispersed phase solution into uniform droplets with the continuous phase solution, and introducing the droplets into a reaction solution with continuous mechanical stirring to form a polyurea film, and after the chip cutting the droplets is finished, placing the reaction solution in a water bath pot and continuously heating and stirring, wherein the polyurea film grows thicker and becomes polyurea-based microcapsules; and washing the obtained polyurea-based microcapsules with cyclohexane, sonicating, centrifuging, and then naturally drying to obtain the microcapsules; mixing the microcapsules with the resin matrix to obtain a self-diagnosis and self-repair intelligent coating material based on the microfluidic technology; and coating the self-diagnosis and self-repair intelligent coating material based on the microfluidic technology on a glass slide and curing to obtain the self-diagnosis and self-repair intelligent coating based on the microfluidic technology, wherein a method for preparing the dispersed phase solution comprises: ultrasonically mixing the 1,3-bis(3-glycidyl propyl)-1,1,3,3-tetramethyldisiloxane, the triarylsulfonium hexafluorophosphate, the rhodamine B and tetraethylenepentamine, wherein a method for preparing the continuous phase solution comprises: ultrasonically mixing an n-hexadecane solution and polyethylene glycol dimeric hydroxy stearate, wherein a method for preparing the reaction solution comprises: ultrasonically mixing 4,4-dicyclohexylmethane diisocyanate, decalin, polyethylene glycol dimeric hydroxy stearate and triethylenediamine.

8 . The preparation method according to claim 7 , wherein a mass ratio of the 1,3-bis(3-glycidyl propyl)-1,1,3,3-tetramethyldisiloxane, the triarylsulfonium hexafluorophosphate, the rhodamine B and the tetraethylenepentamine is 1.1:0.09:0.09:1.

9 . The preparation method according to claim 7 , wherein a mass ratio of the n-hexadecane solution to the polyethylene glycol dimeric hydroxy stearate in the method for preparing the continuous phase solution is 2.784:0.027.

10 . The preparation method according to claim 7 , wherein a mass ratio of the 4,4-dicyclohexylmethane diisocyanate, the decalin, the polyethylene glycol dimeric hydroxy stearate and the triethylenediamine in the method for preparing the reaction solution is 9:67.2:0.75:0.75.

11 . The preparation method according to claim 7 , wherein a flow rate of the dispersed phase solution is 0.02 mL/min, and a flow rate of the continuous phase solution is 0.4-0.6 mL/min.

12 . The preparation method according to claim 7 , wherein a speed of the mechanical stirring is 100 rpm; and parameters of the heating and stirring are: a temperature of 40-60° C., a duration of 1-2 h, and a stirring speed of 200 rpm.

Assignees

• Univ Jiliang China

Inventors

• Wei Guoying
• Hu Jing
• Ji Cuiping
• Tang Qingqing
• Ren Li
• Chang Feifan
• Zhu Benfeng

Classifications

• C09D183/04 Primary

  Polysiloxanes · CPC title

• B01J13/16

  Interfacial polymerisation · CPC title

• C09D7/63

  organic · CPC title

• C09D7/65 Primary

  macromolecular (C09D7/41-C09D7/48 take precedence) · CPC title

• C09D7/70 Primary

  characterised by shape, e.g. fibres, flakes or microspheres · CPC title