Journal
APPLIED SURFACE SCIENCE
Volume 569, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2021.151124
Keywords
PBO fibers; Organic-inorganic hybrid coating; UV resistance; Interfacial bonding strength
Categories
Funding
- National Scientific Research Project (Basis Strengthening Plan)
- State Key Laboratory of Solidification Processing in NWPU [SKLSP202103]
- China Postdoctoral Science Foundation [2019 M653735]
- Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University [CX2021036]
- Polymer Electromagnetic Functional Materials Innovation Team of Shaanxi Sanqin Scholars
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The surface activity and UV resistance of PBO fibers were enhanced by fabricating the Ce0.8Ca0.2O1.8/P(S-co-BCB-co-MMA) organic-inorganic hybrid coating, leading to improved interfacial bonding strength with modified BADCy resins.
Poly(p-phenylene-2,6-benzobisoxazole) (PBO) fibers display weak outdoor stability and reliability due to their poor UV resistance and chemically inert surface. In this work, calcia-doped ceria (Ce0.8Ca0.2O1.8) nanoparticles was fabricated via chemical co-precipitation method, and the novel Ce0.8Ca0.2O1.8/P(S-co-BCB-co-MMA) organ-ic-inorganic hybrid coating was then designed and prepared for surface functionalization of PBO fibers (PBO@P-Ce0.8Ca0.2O1.8). Organic-inorganic hybrid coating presents high surface roughness and excellent UV resistance. When the concentration of Ce0.8Ca0.2O1.8 nanoparticles with the particle size of about 50 nm is 0.6 wt%, PBO@P-Ce0.8Ca0.2O1.8-3 fibers (sample 4, 0.6 wt%) present the best interfacial bonding strength with modified bisphenol A cyanate (BADCy) resins, the single fiber pull-out strength between sample 4 and modified BADCy resins reaches the maximum value of 4.6 MPa, 48.4% higher than that of pristine PBO fibers (sample 0, 3.1 MPa). Meanwhile, the tensile strength of sample 4 after 288 h UV aging is increased from 1.4 GPa (PBO fibers) to 4.1 GPa. Overall, functionalized PBO fibers in this work demonstrate higher surface activity, excellent UV resistance and improved interfacial bonding strength with modified BADCy resins, which provides a new idea for func-tionalizing the surface activity and UV resistance of high-performance polymer fibers.
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