Using textile materials,a flexible ankle-assisted device was designed to achieve assisted dorsiflexion movements of the ankle joint.Sixteen subjects were selected for the test to evaluate wearing comfort and assisting effect of the assist device from both subjective and objective aspects with and without wearing the flexible ankle-assisted device.The test results showed that,the comfort of the subjects wearing the flexible ankle-assisted device at a speed of 4.0 km/h and 7.5 km/h was more than satisfactory,and the heart rate of the subjects decreased by 2.79%and 4.60%respectively compared to the state without the assist device,which verified the assisting effect of the assist device.The design of this flexible ankle-assisted device and the current stage of research can provide some reference value for subsequent related work.
According to the typical 3D fabric products forming process,the forming processes and equipments of weaving,knitting,needling and stitching were introduced,and the characteristics and forming methods of various products were summarized,hoping to provide bases for the design and production of 3D fabric products.
The definition,classification,working principle,applicable fields of bag house were introduced,the index differences of five domestic standards related to bag house were compared.The test results of filter bag and fabric of bag house in China in recent two years were analyzed,and the main quality problems were discussed,hoping to provide references for enterprises to improve product quality.
Textile-based supercapacitors will work in different climatic conditions,and the electrochemical performance of supercapacitors based on traditional alkaline polyvinyl alcohol(PVA)gel electrolytes is significantly affected by temperature.By adding acrylic acid(AA)monomer to the conventional PVA-KOH-H2O system,the electrochemical performance and stability of the gel electrolyte in a wide temperature range were improved in coplanar textile-based supercapacitors.The surface resistance of fabric electrodes,electrical performance of gel electrolyte,and overall electrochemical behavior of coplanar textile-based supercapacitors were tested within the temperature range of-20℃to 60℃to investigate the influence mechanism of temperature on coplanar textile-based supercapacitors,and to compare with those of sandwich-structure textile-based supercapacitor.The results showed that,with temperature increasing,the surface resistance of fabric electrodes decreased,the gel electrolyte's ionic conductivity increased,and coplanar textile-based supercapacitors'energy storage performance gradually improved.The area specific capacitance increased from 1.57 mF/cm2(at 20℃)to 2.70 mF/cm2(at 60℃)at a current density of 0.06 mA/cm2.Since the electrodes and electrolytes were integrated in the same plane,the temperature variation had relatively small impact on the interface interaction of coplanar textile-based supercapacitors.However,the contact area between the electrolyte and air increased,weakening charge-discharge stability at high temperatures.
Polybutene-1 melt-blown nonwoven materials were obtained from polybutene-1 resin by melt-blown nonwoven process.The nonwoven samples were tested and characterized,and their properties were compared with those of polypropylene melt-blown nonwovens.The results show that polybutene-1 melt-blown nonwovens have good tensile properties,while their oil absorption and sound absorption properties are good,but not as good as polypropylene melt-blown nonwovens.
