In this study, silica nanocapsules within silica shell (SNPs) based on an amphiphilic silica precursor polymer – poly (ethylene glycol) substituted hyperbranched polyethoxysiloxane (PEOS-m PEG) was synthesized through a self-assembly method in a fully aqueous with high efficiency. SNPs was homogeneously distributed in waterborne polyurethane to study the influence on the mechanical properties of the nanocomposite as a novel anti-felting agent for wool fabric. The mechanical properties of the nanocomposite anti-felting agent films improved in comparison with the neat polymer. The storage modulus and tensile strength was increased by 143% and 49%, respectively. The novel nanocomposite anti-felting agent was coated on wool fabrics by a pad-dry-cure process. The area shrinkage of the obtained wool fabrics with nanocomposite was 0.8%, much lower than the fabric treated with the same dosage of neat polymer, 4.1%. The warp tensile strength of the wool fabric was increased to 212.2N with lower polymer consumption by 40%.
We prepared the magnetic cenospheres deposited with magnetite Fe3O4nanoparticles under hydrothermal conditions. The crystalline phase, magnetization properties, morphology, chemical composition and thermal stability of asobtained cenospheres are analyzed by Xray diffraction, vibrating sample magnetometer, scanning electron microscope, Xray energy dispersive spectroscope, transmission electron microscope, thermal gravimetric analysis and differential scanning calorimetry techniques. The results show that the inverse cubic spinel phase of Fe3O4nanoparticles with an average size 50 nm are synthesized, and synchronously deposited on cenosphere surface. As the thickness of Fe3O4coating increases, the saturation magnetization increases to some extent. The growth of Fe3O4nanoparticles can be controlled by adding ethanol to the reaction solution.
Non-continuous nano-silver layer deposited on the PET filament by the use of vacuum sputtering technology and then become continuous with the help of newly electroless spray plating process.The functionality and durability of the Silver-coated PET filament was tested and analyzed. The results showed that it has good electrical conductivity. With the weight increasing goes up, the electrical conductivity increases obviously,then prone to slow increment .
On the base of electroless plating on fabric, the Ni-Co-Fe was plated on the PU membrane of coated polyamide fabric and the respiratory electromagnetic shielding fabric was developed. The functionality and wear-ability of electromagnetic shielding fabric was tested and analyzed. The results showed that it has good electrical conductivity, water vapor permeability, electromagnetic shielding performance and durability and so on. With the weight increasing rate goes up, the shielding effectiveness, vapor permeability and electrical conductivity increases obviously, then prone to slow increment. The plated layer on fabric has an adverse effect on the wear performance and on the premise of meeting respiratory and electromagnetic shielding performance, the thickness of plated layer should be decreased to the least extend.
The Ni/Co/Fe plated fabric was obtained by electroless plating. The surface morphology, crystal structure, composition,surface resistance and microwave absorption performance of Ni/Co/Fe plated PET fabric were investigated. The results show that the composites possess effective microwave absorption. The characteristics of microwave absorption can be controlled by adjusting element ratios in composition. This kind of composite has great potential and investigation value in microwave absorbing fields.
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