title: Bio-inspired fabrication of hierarchical Ni-Fe-P coated skin collagen fibers for high-performance microwave absorption.
abstract: In the present investigation, skin collagen fiber (CF) with a well defined hierarchical 3D fibrous structure was employed for the bio-inspired fabrication of high-performance microwave absorption materials. The hierarchical 3D structure of the CF was retained in the CF@Ni-Fe-P composites, and the formation of the Ni-Fe-P coating on the CF surface was identified by XRD and XPS analysis. Based on the electromagnetism parameter measurements, the maximum reflection loss (RL) of the CF@Ni-Fe-P composites reached -31.0 dB, and the width of the absorption band where reflection loss values exceeded -10.0 dB covered the whole Ku-band and some parts of the X-band (9.5-18.0 GHz). The complex permittivity and complex permeability measurements indicated that electronic loss and magnetic loss were involved in the CF@Ni-Fe-P composites for microwave absorption. In addition, due to the magnetic properties of the Ni-Fe-P coating, these CF@Ni-Fe-P composites exhibited excellent magnetic characteristics with high saturation magnetization and low coercivity values. The present investigation indicates a new possibility for the bio-matrix-based fabrication of high-performance microwave absorbing materials with lightweight and efficient absorption properties.
authors.affiliation: Department of Leather Chemistry and Engineering, Sichuan University, Chengdu, China. xpliao@scu.edu.cn shibi@scu.edu.cn.
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Wang
authors.forename: Xuepin
authors.initials: X
authors.lastname: Liao
authors.forename: Wenhua
authors.initials: W
authors.lastname: Zhang
authors.forename: Bi
authors.initials: B
authors.lastname: Shi
mesh_terms: D003094:Collagen / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008872:Microwaves; D009532:Nickel / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D012867:Skin; D013499:Surface Properties
chemical_list: D010758:Phosphorus; D009532:Nickel; D003094:Collagen; D007501:Iron