Robust,Flexible,and Superhydrophobic Fabrics for High-Efficiency and Ultrawide-Band Microwave Absorption

Microwave absorption(MA)materials are essential for protecting against harmful electromagnetic radiation.In this study,highly efficient and ultrawide-band microwave-absorbing fabrics with superhydrophobic surface features were developed using a facile dip-coating method involving in situ graphene oxide(GO)reduction,deposition of TiO_(2)nanoparticles,and subsequent coating of a mixture of polydimethylsiloxane(PDMS)and octadecylamine(ODA)on polyester fabrics.Owing to the presence of hierarchically structured surfaces and low-surface-energy materials,the resultant reduced GO(rGO)/TiO_(2)-ODA/PDMS-coated fabrics demonstrate superhydrophobicity with a water contact angle of 159°and sliding angle of 5°.Under the synergistic effects of conduction loss,interface polarization loss,and surface roughness topography,the optimized fabrics show excellent microwave absorbing performances with a minimum reflection loss(RL_(min))of47.4 dB and a maximum effective absorption bandwidth(EAB_(max))of 7.7 GHz at a small rGO loading of 6.9 wt%.In addition,the rGO/TiO_(2)-ODA/PDMS coating was robust,and the coated fabrics could withstand repeated washing,soiling,long-term ultraviolet irradiation,and chemical attacks without losing their superhydrophobicity and MA properties.Moreover,the coating imparts self-healing properties to the fabrics.This study provides a promising and effective route for the development of robust and flexible materials with microwave-absorbing properties.

Application of Stochastic Resonance Signal Recovery

Stochastic resonance（SR） enhances the nonlinear system behavior with the assistance of noise, including the sensitivity and selectivity of the response to the exterior stimulus. The energy-transfer mechanism makes the weak information revealed in the output spectrum, while the time-waveform is distorted. The distortion analysis was made both from the particle＇s dynan-fics and signal processing. The factors causing the deviation in the output are presented and the function of the recovery system is proposed. By the investigation of the particle＇s motion track in the bistable system and the suggested recovery system, the influences of noise and system parameters on the recovery course were discussed. Moreover, the pulse distortion appearing the recovery waveform caused by the particle＇s transitions at the bistable potential＇ inflexions was explained. Due to different characteristics, cascaded-bistable SR or mono-stable SR was introduced to process different types of signals. The final recovery signal is just the suggested recovery system＇s response to the SR output. Meanwhile, the recovery system is optional, as parameter-tuned or parameter-fixed. Since the method requires no average processing, it is applicable to a single sample with limited length. The numerical simulations reveal that the SR recovery method can recover the waveform containing weak information submerged ha noise effectively. The engineering application to the vibration analysis of metal cutting chose the combination of mono-stable SR and the parameter-fixed recovery system. Because the optimal SR state is not required strongly, the system parameters are tuned in a wider range than the traditional SR processing methods.

Eco-labels系统及其对纺织品生产与贸易的影响

文章简要介绍了Eco-labels系统的种类、Eco-labels系统建立的目的要求以及Eco-labels系统在纺织工业中的应用情况,并指出了ko-Tex(or Oeko-tex)labels,EC Eco-labels及Unified Sustainable Textile Standard(2.0的特点。ko-tex standards and EC Eco-label对纺织品中的3种普遍有害物(甲醛、化学残留物、重金属)的限制要求也进行了扼要的阐述,同时摘录了部分EC Eco-label系统对毛纺织品及其生产加工的要求。

Three-Dimensional Metacomposite Based on Different Ferromagnetic Microwire Spacing for Electromagnetic Shielding

An electromagnetic shielding metacomposite based on the absorbing mechanism was prepared by weaving ferromagnetic microwires into the three-dimensional(3D)fabric.The influence of the ferromagnetic microwire spacing on electromagnetic shielding performance and the electromagnetic shielding mechanism of 3D metacomposites were studied.The total electromagnetic shielding performance increases with the increase of electromagnetic wave frequency.3D metacomposites based on the absorbing mechanism can avoid the secondary pollution of electromagnetic waves,and have great potential in military,civil,aerospace and other fields.

One-Pot Synthesis of Dimethyl Carbonate over Basic Zeolite Catalysts

One-pot synthesis of dimethyl carbonate (DMC) from methanol, propylene oxide (PO) and carbon dioxide has been investigated using the basic zeolites as catalysts. Among the zeolites studied, Beta showed the best catalytic performance for DMC production. That the desilication of zeolite structure resulted in a hierarchical porosity of Beta, leading to more amount of KOH can be loaded on the surface of zeolite and therefore enhancing the base strength of the catalyst was proposed to be the reason for improved catalytic performance.

Equations of two-phase flow in spray chamber

The downstream water-air heat and moisture transfer system in a moving coordinate was studied. The relationship between the diameter of the misted droplets and the spray pressure was determined. Based on the theory of the relative velocity,the two-phase flow mode of the spray chamber and the efficiency equation for heat and moisture exchange were established. Corrections were carried out for the efficiency equation with spray pressure of 157 kPa. The results show that the pressure plays an important part in determining the efficiency of heat and moisture exchange. When the spray pressure is less than 157 kPa,better coincidence is noticed between the theoretical analysis and the test results with the error less than 6%. Greater error will be resulted in the case when the spray pressure is beyond 157 kPa. After the correction treatment,the coincidence between the theoretical and the experimental results is greatly improved.

The application of corset element in fashion design

This article is focused on the fashion that inspired by corset and create a collection of the same kind that can reflect the needs of today＇ s consumers. In mixing and matching today＇ s a past corset＇ s elements with today＇ s sportive fashion.Since nowadays, people＇ s lifestyle is freer, casual and personal than before. Consumer＇ s wearing concept was also definitely different from the past.It is necessary to create the new direction for today＇ s consumers to satisfy the new mode of their lifestyle and the change of their wearing concept.

The research and develop on the training mode of the innovative professional photography personnel

Under the background of the Digital Age, This article proposes suggestions on the training mode of the innovative professional photography personnel. We should rest on the good foundations of the demand pattern of ＇Double art talent＇ and take advantage of the advanced special services of Art Design. We should persist in the principle of Artistic Innovation first. We should establish an optimal training scheme of ＇photography creative talents＇ . A highly innovative photography subject system will train talents for ＇Design of photography＇ . We should change our opinions on traditional teaching, and to suggest improvements or comment on the practicability of the innovation and reform of Professional photography.

The manifestation of texture art in the creative design of fashion fabrics

This paper presents a discussion of the characters and design patterns of the digital texture design in fashion fabrics. It starts from the characters of fabric texture design, taking digital printing technology as a detailed example, and raises a possible design route and pattern of the innovative design of fashion fabrics under digital technology.

Exploring the music in the film

Nowadays, film is essential to our recreational life.Most people always focus on the plots.If we turn our attention to the film scores,we could find that every rhythm is full of your deep feelings.With the research of the art of sound, we could see with our eyes, and hear with our heart.

The characteristic and revelation of Digital media art education in French considering international education

The essay analyzes the characteristics of Digital media art education in French from Philosophy of Education and teaching model, teaching method, Teaching environment, etc. Based on the conditions of these characteristics, this essay proposed several basic key points of Digital media art education development in china according to the education system at the present stage.

Region Culture Resources--The motive that drives people to create animated cartoon.

The importance of the original artistic animation was discussed from the protection of region culture resources and the exploiture plan of the cultural resources in Hubei Province

Highly selective adsorption of rhenium by amyloid-like protein material

Rhenium separation from molybdenum in molybdenite minerals and waste leachate has become an emerging challenge.Addressing this challenge,we prepared a set of protein-based alkylamine/alkylammonium salts complexes as extractants for selective uptake of rhenium from molybdenum,where the protein component turned into the insoluble amyloid-like structure when its internal disulfide bonds were reduced,namely phase-transition process.Among them,the phase-transited lysozyme and methyletrioctyleammonium chloride complex(PTL-N263)exhibited the most efficient adsorption at the alkaline condition for the electrostatic interaction between negatively charged metal ions with positively charged center(R_(4)N^(+))in N263,where negatively charged protein residues hindered the ion exchange of Cl^(-)in N263 for larger size Mo species(Mo_(7)O_(24)^(6-))than smaller size Re species(ReO^(4-)).The adsorption follows the Freundlich model and pseudo-second-order kinetics,which exhibits toplevel adsorption performance with a maximum adsorption capacity of 124 mg/g and a separation factor(β_(Re/Mo))of 2.78×10^(3)for Re.The adsorption capacity per unit area(57.2 mg/(g m^(2)))is 1.6–41 times higher than previously reported adsorbents,and the cost for adsorbing 1 g of Re(VII)is$1.07,indicating its industrial capability.This adsorption strategy can be applied to separating Re from Mo in binary solutions and industrial wastewater with other competing ions.

All‑Fiber Integrated Thermoelectrically Powered Physiological Monitoring Biosensor

Advanced fabric electronics for long-term personal physiological monitoring,with a self-sufficient energy source,high integrity,sensitivity,wearing comfort,and homogeneous components are urgently desired.Instead of assembling a self-powered biosensor,comprising a variety of materials with different levels of hardness,and supplementing with a booster or energy storage device,herein,an all-fiber integrated thermoelectrically powered physiological monitoring device(FPMD),is proposed and evaluated for production at an industrial scale.For the first time,an organic electrochemical transistor(OECT)biosensor is enabled by thermoelectric fabrics(TEFs)adaptively,sustainably and steadily without any additional accessories.Moreover,both the OECT and TEFs are constructed using a cotton/poly(3,4-ethylenedioxythiophene):poly(styrenesulfon ate)/dimethylsulfoxide/(3-glycidyloxypropyl)trimethoxysilane(PDG)yarn,which is lightweight,robust(90°bending for 1000 cycles)and sweat-resistant(ΔR/R0=1.9%).A small temperature gradient(ΔT=2.2 K)between the environment and the human body can drive the high-gain OECT(71.08 mS)with high fidelity,and a good signal to noise ratio.For practical applications,the on-body FPMD produced an enduring and steady output signal and demonstrated a linear monitoring region(sensitivity of 30.4 NCR(normalized current response)/dec,10 nM~50µM)for glucose in artificial sweat with reliable performance regarding anti-interference and reproducibility.This device can be expanded to the monitoring of various bio-markers and provides a new strategy for constructing wearable,comfortable,highly integrated and self-powered biosensors.

Recent Advances in Superhydrophobic and Antibacterial Cellulose‑Based Fibers and Fabrics:Bio‑inspiration,Strategies,and Applications

Cellulose-based fabrics are ubiquitous in our daily lives.They are the preferred choice for bedding materials,active sportswear,and next-to-skin apparels.However,the hydrophilic and polysaccharide characteristics of cellulose materials make them vulnerable to bacterial attack and pathogen infection.The design of antibacterial cellulose fabrics has been a long-term and on-going effort.Fabrication strategies based on the construction of surface micro-/nanostructure,chemical modification,and the application of antibacterial agents have been extensively investigated by many research groups worldwide.This review systematically discusses recent research on super-hydrophobic and antibacterial cellulose fabrics,focusing on morphology construction and surface modification.First,natural surfaces showing liquid-repellent and antibacterial properties are introduced and the mechanisms behind are explained.Then,the strategies for fabricating super-hydrophobic cellulose fabrics are summarized,and the contribution of the liquid-repellent function to reducing the adhesion of live bacteria and removing dead bacteria is elucidated.Representative studies on cellulose fabrics functionalized with super-hydrophobic and antibacterial properties are discussed in detail,and their potential applications are also introduced.Finally,the challenges in achieving super-hydrophobic antibacterial cellulose fabrics are discussed,and the future research direction in this area is proposed.