Yumei Zhang

Title: Yumei Zhang and Flame-Retardant Cellulosic Fibers

Introduction

Yumei Zhang is a woman inventor associated with Donghua University in Shanghai, China. Her patent work addresses the preparation of flame-retardant cellulosic fibers, combining fiber-processing steps with a treatment designed to impart flame-retardant properties.

Latest Patents

Zhang is associated with 1 patent, titled “Method for Preparing Flame-Retardant Cellulosic Fibers.” The disclosed method extrudes a cellulosic solution through a spinneret, then coagulates, stretches, and water-washes the resulting filament. The filament is treated with a flame-retardant solution, rinsed, and dried to produce the finished fiber.

The process specifies a water-washing temperature of no more than 90°C, a flame-retardant treatment temperature of 60–90°C, and a rinsing temperature of 20–40°C. The flame retardant contains one or more types of groups that can form covalent bonds or hydrogen bonds with hydroxyl groups in the cellulose macromolecule, or that can undergo self-crosslinking. The resulting material is described as a cellulosic fiber matrix with flame retardant dispersed within it.

Career Highlights

Zhang’s listed patent reflects work on functional cellulosic materials and their preparation. Its process details address both the treatment conditions and the chemical interactions intended to retain flame-retardant components in the fiber.

Collaborations

The supplied information lists Shiqiang Cui and Hong Jin as Zhang’s coworkers. Donghua University is identified as her institutional affiliation.

Conclusion

Yumei Zhang’s patent describes a controlled method for producing flame-retardant cellulosic fibers through solution spinning and subsequent chemical treatment.