As the chemical fiber industry pursues high-performance and multi-functional transformation, graphene fiber hollow 3D materials have become a key force in breaking through the limitations of traditional chemical fibers with their unique structure and excellent performance. They not only inject technological vitality into the industry, but also expand the application boundaries. Its value and production process are worthy of in-depth discussion.

graphene fiber hollow 3D materials first broke through the performance bottleneck of traditional chemical fibers. Although traditional chemical fibers such as polyester and nylon are low in cost, they have problems such as insufficient strength and poor weather resistance, making it difficult to meet the needs of high-end fields. When the high strength and high conductivity of graphene are combined with the lightweight and high breathability of the hollow 3D structure, the tensile strength of the material is more than 30% higher than that of ordinary chemical fibers. It also has excellent thermal conductivity and UV resistance. It can be directly used in high-end outdoor clothing, aerospace lightweight components and other scenarios, filling the gap in the high-performance field of chemical fiber materials.

Secondly, this material promotes the functional upgrade of the chemical fiber industry. Traditional chemical fibers have single functions and are mostly limited to the field of textile fabrics. However, graphene fiber hollow 3D materials can develop functional products such as medical antibacterial dressings and water filter materials by virtue of the adsorption properties of the hollow structure and the antibacterial properties of graphene. For example, its hollow channels can efficiently absorb pollutants in water, with a filtration efficiency of more than 95%, and the antibacterial properties of graphene can inhibit the growth of bacteria, providing possibilities for cross-field applications such as environmental protection and medical treatment, and broadening the market territory of the chemical fiber industry.

graphene fiber hollow 3D materials also meet the industry’s low-carbon needs. In its production process, biodegradable polymers can be used as the matrix, with a low dosage of graphene nanosheets (only 0.5%-1% addition can achieve a performance jump), reducing resource consumption; at the same time, the hollow structure reduces the material density by 40%, which can reduce the use of dyes and additives in subsequent processing, helping the chemical fiber industry achieve the "double carbon" goal and promoting the industry's transformation to green.

the preparation of the material requires four key steps. The first step is the preparation of raw materials. The graphene nanosheets are evenly dispersed in the polyester or polyamide spinning liquid through ultrasonic dispersion technology. The dispersion concentration and particle size are controlled to ensure uniform distribution of graphene, which is the basis for ensuring material performance. The second step is composite spinning. A hollow spinneret is used for spinning in the melt spinning equipment. By adjusting the spinneret aperture (usually 0.1-0.3mm) and spinning temperature (260-280℃), the spun fibers form a hollow structure, and the traction device is used to control the fiber stretching multiple (usually 3-5 times) to improve the fiber strength; the third step is 3D forming processing, where the spun hollow fibers are woven into 3D through a braiding machine For the three-dimensional structure, the weaving density is adjusted according to the application requirements. For example, loose weaving is used when used for filter materials, and dense weaving is used for structural parts. The last step is post-processing and testing. The 3D molded material is heat-set (temperature 120-150°C) to stabilize the structure, and then the hollowness is detected by an electron microscope and the mechanical properties are tested by a tensile testing machine to ensure that the product meets industry standards.

Today, graphene fiber hollow 3D materials have emerged in many fields. With the continuous optimization of production processes and cost reduction, it will further promote the transformation of the chemical fiber industry from "basic manufacturing" to "high-end intelligent manufacturing" and become the core driving force for the high-quality development of the industry.