Changhai Xu

Title: **Innovative Contributions of Inventor Changhai Xu**

Introduction

Changhai Xu is a prominent inventor based in Qingdao, China, known for his significant contributions to the field of dye chemistry and material science. With a total of two patents to his name, Xu has made strides in developing innovative methods for enhancing dye properties and creating sustainable materials.

Latest Patents

Changhai Xu's latest patents showcase his expertise in fiber production and dye chemistry. His first patent involves an "Alginate fiber and preparation method thereof." This invention outlines a comprehensive preparation process for alginate fiber using sodium alginate as a raw material. The method comprises several key steps: preparing a spinning solution, extruding it into a solidification bath for molding, water-washing, and finally soaking the fiber in a finishing agent that includes a five-membered cyclic quaternary ammonium salt polymer. The resulting alginate fiber boasts high dye uptake, minimal fiber strength loss, and excellent soaping fastness.

The second patent focuses on a "Method for improving alkali resistance and oxidation resistance of benzothiazole disperse dye." This innovation relates to designing and synthesizing 28 thiazole heterocyclic azo disperse dyes utilizing specific diazo and coupling components. Xu's method significantly improves the alkali and oxidation resistance of these dyes, which are proven to perform effectively under challenging dyeing conditions. This innovative process enables simultaneous bleaching and dyeing of polyester and cotton, achieving substantial ecological and economic benefits.

Career Highlights

Changhai Xu has held notable positions in various respected organizations, including Qingdao University and Penglai Jiaxin Dye Chemical Co., Ltd. His academic and industrial experiences have facilitated his research and development efforts, allowing him to bridge the gap between theoretical exploration and practical applications in the dye chemistry sector.

Collaborations

Throughout his career, Xu has collaborated with several talented professionals, including Xiaoyan Wang and Jiaxue Yu. These collaborations have played a critical role in enriching his research and enhancing the quality and effectiveness of his inventions.

Conclusion

Changhai Xu's innovative work in material science and dye chemistry continues to position him as a key figure in his field. With his patents, he is contributing not only to the scientific community but also advancing sustainable practices in the manufacturing of textiles. Xu's contributions reflect the ongoing evolution of innovations in dye technology and material development.