Study on Bombyx mori silk treated by oxygen plasma

Area of Science:

• Materials Science
• Biomaterials Engineering
• Surface Chemistry

Background:

• Bombyx mori silk is a natural protein fiber with unique properties.
• Surface modification of silk can enhance its performance for various applications.
• Low-temperature plasma treatment is a versatile technique for material surface engineering.

Purpose of the Study:

• To investigate the effects of low-temperature oxygen plasma on the morphology, aggregation structure, and properties of Bombyx mori silk.
• To evaluate changes in surface characteristics and mechanical performance after plasma treatment.
• To assess the potential for improved functionalization, such as stannic filling.

Main Methods:

• Bombyx mori silk fibers were treated with low-temperature oxygen plasma.
• Surface morphology was analyzed using microscopy.
• Changes in molecular conformation and crystalline structure were assessed.
• Stannic filling rate and breaking strength were measured.

Main Results:

• Plasma treatment induced slight flutes on the silk fiber surface, altering its structure.
• A decrease in crystalline degree and changes in molecular conformation were observed.
• The stannic filling rate of the treated silk fiber significantly improved.
• Fiber weight decreased due to etching, but breaking strength remained largely unchanged after short treatment times.

Conclusions:

• Low-temperature oxygen plasma treatment effectively modifies Bombyx mori silk surface and structure.
• The enhanced stannic filling rate suggests improved potential for composite material applications.
• The minimal impact on breaking strength indicates retained mechanical integrity for practical use.