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  4. Vol 10, Issue 1, 2026

Preparation of Graphene-Nylon Composite Materials and Their Application in Spinal Scoliosis Corrective Braces

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DOI: 10.23977/jmpd.2026.100115 | Downloads: 0 | Views: 14

Author(s)

Zhang Qian 1, Wu Hailin 1, Wen Ping 2, Wang Hao 2, Liu Chun 1, Deng Manjiao 1, Yuan Kaijie 1

Affiliation(s)

1 Grahope New Material Technology Inc., Shenzhen, Guangdong, 518063, China
2 Maternal and Child Healthcare Medical Research Institute, Shenzhen Maternity and Child Healthcare Hospital, Southern Medical University, Shenzhen, Guangdong, 518100, China

Corresponding Author

Zhang Qian

ABSTRACT

Initially, a graphene dispersion solution was obtained by aminating graphene oxide, which was synthesized via an improved Hummers method. Specific particle size nylon powder, modified graphene dispersion liquid and Chemical auxiliaries were added to a high-pressure vessel at a certain ratio under specific temperature and pressure conditions. The amide groups on the surface of the graphene nanoflakes reacted with the nylon powder to form a complete coating, resulting in shape-regular and uniform particle sizes of graphene-nylon composite powders. Subsequently, utilizing biomechanical simulation combined with selective laser sintering (SLS) process, we shaped-sintered the three-dimensional orthopedic braces. We optimize the brace printing process by taking into account material properties, laser power, predicted temperature, powder thickness, scanning speed and additives. Furthermore, the performance and application effect of the orthopedic braces are verified through properties tests and clinical trials. The results show that the maximum tensile strength was 45MPa, and the maximum bending modulus was 1232MPa, the heat distortion temperature was 144°C, No obvious changes were observed in the sample after more than 5,000 times of opening and closing tests with the opening angle ≥120°. Moreover, the results of clinical trial show that before and after the intervention, the average scoliosis angle of the patients decreased from 13.36 degrees to 6.21 degrees and more than 50% of the patients decreased from 12.68 degrees to 3.85 degrees, which proves the clinical effectiveness of spinal scoliosis corrective brace based on the graphene-nylon composite material.

KEYWORDS

Graphene-nylon composite material; Graphene dispersion; 3D printing; Material properties; Spinal scoliosis corrective brace

CITE THIS PAPER

Zhang Qian, Wu Hailin, Wen Ping, Wang Hao,  Liu Chun, Deng Manjiao, Yuan Kaijie. Preparation of Graphene-Nylon Composite Materials and Their Application in Spinal Scoliosis Corrective Braces. Journal of Materials, Processing and Design (2026). Vol. 10, No. 1, 119-131. DOI: http://dx.doi.org/10.23977/jmpd.2026.100115.

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