In the mid-1980s, people hoped to find materials that integrate intelligent sensing, driving, and information processing. New developments in textile technology in the 21st century have enabled the production of “smartâ€, “smartâ€, and “smart†fiber materials for the production of smart textiles, or use conventional fabrics as a “platform†to add a variety of new chemical materials. Produce smart textiles. The concept of smart fiber comes from bionics, and it generally achieves self-repair, self-adjustment, self-diagnosis, self-adaptation, self-recovery and other functions from three aspects of bionics, molecular design, and composite technology. Click to buy cashmere sweater Among them, polymer matrix composites with self-repairing function are hot topics in academia in recent years. At present, the development and research in this field has become a hot spot in the scientific community. As a new type of smart material, self-healing polymer matrix composites are self-healing mechanisms that mimic the self-healing mechanism of biological damage and microscopic cracks that are difficult to detect with the naked eye during material processing or use. The self-repairing methods of polymer matrix composites mainly include intrinsic self-repairing and foreign aid self-repairing. The difference between the two lies in whether the self-healing system needs an extra repair agent. The external self-repairing self-repairing function is achieved through the addition of repair agents inside and outside the material system. This article focuses on introducing external self-healing materials for external aids. Click to buy cashmere sweater Hollow fiber self-repairing material Hollow fiber self-repairing method repair mechanism is to hollow fiber embedded in the matrix material, the hollow fiber is filled with repair fluid, when the material damage occurs through the release of hollow fiber repair fluid bonding cracks in the damage area to repair. This method was first applied to fiber reinforced concrete materials. In recent years, many researchers have applied it to the field of self-repair of polymer matrix composites. Hollow fiber diameter is generally 40 ~ 200 μ m, according to the type of fiber repair agent can be divided into three types: hollow fiber filled with single-component repair agent, the component can be in the air and other effects without curing agent The self-repair is realized; the repair agent and the curing agent are respectively injected into different hollow fibers, and the self-repair process needs the contact between the repair agent and the curing agent; the repair agent is injected into the hollow fibers, and the curing agent is dispersed in the matrix material in the form of microcapsules. Need to contact the two to achieve self-repair function. Click to buy cashmere sweater Nanoparticles self-healing materials The self-repairing mechanism of nano-particles is that when the material is cracked, the nano-particles diffuse into the crack region (the smaller the nano-particle size is, the better the diffusion effect is), and the diffused nano-particles will fill the cracks to repair the cracks. Click to buy cashmere sweater Microcapsules self-repairing materials Microcapsules self-healing polymer materials were first proposed in 2001 and became a hot topic for research scholars in the following decades. They have become one of the most important self-healing methods. The self-repairing mechanism is: embedding microcapsules containing a repair agent in a polymer matrix material and embedding the catalyst in the matrix (it is also possible to embed the catalyst in the matrix material after microencapsulation), and the material is cracked. The expansion of the crack causes the microcapsules to rupture, and the released repair agent diffuses toward the damaged area under the effect of siphoning. After the catalyst is met, polymerization cracks occur. Click to buy cashmere sweater Microvascular self-healing materials Although the microcapsule self-healing system is currently the most widely used, it can only achieve a single repair, and there is still a gap compared with the ideal self-healing material. In contrast, the micro-vascular network self-healing system, first implemented in 2007, realized the continuous replenishment of repair agents by simulating the self-healing principle of living tissue and embedding micro-vessels with a three-dimensional network structure inside the material. Therefore, multiple repairs of material damage can be achieved. Self-repair of carbon nanotubes Carbon nanotubes as a material self-repairing system, the repair mechanism is: the embedded carbon nanotubes in the matrix material acts as a container, in which the repair agent molecules are stored, when the material cracks, the carbon nanotubes rupture, the repair agent is released After the adsorption at the crack or at the crack chemical reaction bond cracks to achieve self-repair function. The self-repairing system of carbon nanotubes is an ideal self-repairing material system, but it is only at the stage of computer simulation. There is no real experimental research and it is expected to be well applied in the future. Click to buy cashmere sweater Self-healing polymer materials are currently in the stage of rapid development and belong to the field of interdisciplinary research. Therefore, researchers with multiple knowledge backgrounds are required to join. The main trends in the future are: 1 Optimize and develop new self-healing systems to improve the efficiency of repairs and the number of self-repair cycles; 2 The realization of the self-repairing function does not affect the performance of the base material; 3 Self-repairing has self-diagnostic function at the same time, so that the self-healing polymer material can realize real bionic material; 4 From laboratory research to engineering applications. Click to buy cashmere sweater The development of smart materials lays a solid foundation for the development of smart textiles and promotes the development of high-end textile industries. We apply the smart materials to textiles or make textiles intelligent, so that traditional textiles are blooming. Want to learn more about cashmere sweater: accessible Pay attention to WeChat public number "Cashmere sweater industry platform" to learn more about cashmere sweater information JOYA GIFT CO.,LIMITED , https://www.joya-jewelry.com
Fresh textiles can also imitate organisms healing automatically after injury
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