CN-121992670-A - Temperature-responsive printed color-changing fabric and preparation method thereof

Abstract

The application discloses a temperature-responsive type printing color-changing fabric and a preparation method thereof, wherein the temperature-responsive type printing color-changing fabric is prepared from 3-8 parts by weight of polyester fiber base fabric and temperature-sensitive dye, and the temperature-sensitive dye comprises 40-50 parts by weight of microcapsule type thermochromic dye, 1-3 parts by weight of thickener, 2-4 parts by weight of curing agent, 0.5-1.5 parts by weight of dispersing agent, 2-4 parts by weight of toughening agent, 1-2 parts by weight of nano silicon dioxide and the toughening agent comprises aminopropyl terminated polydimethylsiloxane and epoxy modified polydimethylsiloxane.

Inventors

• YU MING
• LIU DING
• CHEN ZHENZHEN

Assignees

• 东莞市背派客信息科技有限公司

Dates

Publication Date

20260508

Application Date

20260302

Claims (8)

1. 1. The temperature-responsive printed color-changing fabric is characterized by being prepared from polyester fiber base cloth and temperature-sensitive dye, wherein the temperature-sensitive dye comprises the following components in parts by weight: 3-8 parts of microcapsule thermochromic dye, 40-50 Parts of organosilicon modified epoxy resin adhesive, 1-3 Parts of a thickening agent, 2-4 Parts of a curing agent, 0.5 To 1.5 parts of dispersing agent, 2-4 Parts of a toughening agent, 1-2 Parts of nano silicon dioxide; The toughening agent comprises aminopropyl terminated polydimethylsiloxane and epoxy modified polydimethylsiloxane.
2. 2. The temperature-responsive printed color-changing fabric as claimed in claim 1, wherein the mass ratio of the aminopropyl terminated polydimethylsiloxane to the epoxy modified polydimethylsiloxane is 1 (2-4).
3. 3. The temperature-responsive printed color-changing fabric of claim 1, wherein the nano-silica is modified with an epoxy silane coupling agent.
4. 4. A temperature-responsive printed color-changing fabric according to claim 3, wherein the epoxy silane coupling agent is gamma- (2, 3-glycidoxy) propyl trimethoxy silane coupling agent.
5. 5. A temperature responsive printed color changing fabric as claimed in claim 1, wherein the thickener is a nonionic polyurethane associative thickener.
6. 6. A temperature-responsive printed color-changing fabric as claimed in claim 1, wherein the curing agent is an aziridine type curing agent.
7. 7. A temperature-responsive printed color-changing fabric as claimed in claim 1, wherein the dispersant is polyacrylic dispersant.
8. 8. A method for preparing the temperature-responsive printed color-changing fabric as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps of coating temperature-sensitive dye on a base fabric by adopting a screen printing technology, and drying and curing to obtain the temperature-responsive printed color-changing fabric.

Description

Temperature-responsive printed color-changing fabric and preparation method thereof Technical Field The application relates to the technical field of textile functional materials, in particular to a temperature-responsive printed color-changing fabric and a preparation method thereof. Background Currently, with the continuous development of technology, the functional requirements of textiles are increasingly raised, and particularly, the requirements of intelligent textiles capable of reacting with the change of external environment are rapidly growing. The temperature response type printed color-changing fabric is taken as an important branch of intelligent textiles, and shows wide application prospects in various fields such as clothing, home decoration, toys and the like by virtue of the unique color-changing characteristics. Such fabrics are typically provided with a color-changing layer comprising a temperature-sensitive substance applied or printed on a substrate, wherein the substance in the color-changing layer changes physically or chemically when the ambient temperature changes, thereby causing a color change. However, the existing temperature-responsive printed color-changing fabric has the defects in terms of durability and wear resistance. Because the bonding strength between the color-changing layer and the base material is limited, the color-changing layer is easy to fall off or fade after being washed for a plurality of times or used for a long time, so that the color-changing effect is weakened or even disappears, and meanwhile, the color-changing layer is easy to damage when the fabric is rubbed or scratched, so that the service life and the appearance quality of the fabric are further influenced. Disclosure of Invention In order to solve the problem that the temperature-responsive printed color-changing fabric has defects in durability and wear resistance, the temperature-responsive printed color-changing fabric and the preparation method thereof are provided. The first object of the present invention is achieved by the following technical solutions: the temperature-responsive printed color-changing fabric is prepared from base cloth and temperature-sensitive dye, wherein the temperature-sensitive dye comprises the following components in parts by weight: 3-8 parts of microcapsule thermochromic dye, 40-50 Parts of organosilicon modified epoxy resin adhesive, 1-3 Parts of a thickening agent, 2-4 Parts of a curing agent, 0.5 To 1.5 parts of dispersing agent, 2-4 Parts of toughening agent 1-2 Parts of nano silicon dioxide; the toughening agent comprises aminopropyl terminated polydimethylsiloxane and epoxy modified polydimethylsiloxane. By adopting the technical scheme, the microcapsule type thermochromic dye internally encapsulates an electron donor (leuco dye), an electron acceptor (color developing agent) and a solvent medium, when the ambient temperature is lower than the melting point of the solvent, the solvent is solid, the electron donor is in close contact with the acceptor to generate proton transfer or charge transfer, the dye is in a color developing state, when the temperature is increased to the melting point of the solvent, the solvent is melted into a liquid state, the molecular activity is increased rapidly, the donor and the acceptor are separated by solvent molecules, the interaction is destroyed, the dye returns to the leuco state, the macroscopic appearance is color disappearance or conversion, and the thermochromic change is realized; The organic silicon modified epoxy resin adhesive introduces a flexible polysiloxane chain segment into a rigid epoxy resin skeleton through chemical modification, so that the synergy and balance of performances are realized, the epoxy resin component provides high strength, high crosslinking density and excellent adhesive force to polyester fibers, a rigid supporting skeleton of the coating is formed, the introduced organic silicon chain segment can effectively absorb and disperse stress by virtue of excellent flexibility and hydrophobicity, and the flexibility and cracking resistance of the coating are improved; The thickener forms a three-dimensional network structure in a water phase to improve the viscosity of the system and endow the system with strong shear thinning property, the curing agent and active functional groups (such as carboxyl and hydroxyl) on a polymer chain of the adhesive react to form a covalent bond bridge, linear or branched macromolecules are connected into the three-dimensional network structure, the solvent resistance, chemical resistance, creep resistance and mechanical strength of a coating film are enhanced, the dry/wet friction fastness, the washing fastness and the adhesive force to a base cloth are improved, the dispersing agent is adsorbed on the surface of the thermochromic dye, agglomeration is prevented through electrostatic repulsion or steric hindrance, the uniformity and the stability of color respo