Electroless Deposition to Fabricate Radiation Protection Suits for Pregnant Women: Effect of Water Bath Temperature on the Electromagnetic Shielding Performance

Parameters were defined to germinate pecan [Carya illinoinensis (Wangenh.) C. Koch] seeds in aerated water followed by container planting. Germination was not affected by the ratio of seeds to water in the germination containers. Highest germination rates with the greatest uniformity in germination were obtained with a water bath temperature of 32 °C. Stratification up to 188 days increased the rate of germination, but the largest response was between no stratification and 56 days (6.5 days vs. 2.3 days to reach 50% germination, respectively). Seeds that were germinated in a water bath, then planted in containers, achieved 50% emergence in 4.7 days compared to 12.4 days for direct-planted seed. Emergence was more uniform when seeds were germinated in water before planting compared with seeds that were directly planted in containers (7.0 days vs. 9.5 days between 10% and 90% emergence, respectively). Also, by germinating the seeds before planting, nonviable seeds were eliminated, resulting in 100% emergence compared to 76% emergence when planted directly.

Download Full-text

Electroless plating process for the manufacture of radiation protection suits for pregnant woman: Effect of bending on its electromagnetic shielding performance

Journal of Industrial Textiles ◽

10.1177/15280837211068205 ◽

2022 ◽

pp. 152808372110682

Author(s):

Chengmei Gui ◽

Di Sun ◽

Wenya Liu ◽

Haodong Ma ◽

Zhenming Chen ◽

...

Keyword(s):

Pregnant Woman ◽

Radiation Protection ◽

Noble Metals ◽

Low Cost ◽

Fiber Surface ◽

Electroless Nickel ◽

Electromagnetic Shielding ◽

Shielding Effectiveness ◽

Blend Fiber ◽

Negative Effect

Multi-ion fabrics (especially silver ion fabrics) have special advantages as electromagnetic radiation, but the use of noble metals enhances its cost. Electroless nickel plating (EP-Ni) has great potential application in fabricating low-cost metallized material. Here, EP-Ni on pure cotton surface to fabricate radiation protection suits for pregnant woman was established to replace traditional protection suits with silver film. The active groups on the cotton/polyester blend fiber surface could absorb tin and palladium ions, acting as catalytic centers, which can catalyze the reduction of Ni2+ in the plating solution. Ni particle with (111) crystal plane preferential oriented crystal structure deposited on cotton surface with a coarse microstructure. The Ni deposited amount is about 19%. The fabricated material exhibited a shielding effectiveness of 29.5 dB. Studies also shown that bending has no negative effect on crystallinity and electrical property. But more bending times could lead to crack, which would decline electromagnetic shielding performance by 24%.

Download Full-text

Copper/bamboo fabric composite prepared via a silver catalytic electroless deposition process for electromagnetic shielding

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.3139/146.110945 ◽

2013 ◽

Vol 104 (9) ◽

pp. 912-917 ◽

Cited By ~ 1

Author(s):

Qian Liang ◽

Yinxiang Lu

Keyword(s):

Electroless Deposition ◽

Deposition Process ◽

Electromagnetic Shielding ◽

Fabric Composite

Download Full-text

Research of Artificial Rumen Constant Temperature Water Bath Based on Fuzzy Logic Controller

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.602-605.2487 ◽

2014 ◽

Vol 602-605 ◽

pp. 2487-2490

Author(s):

Xi Wu Li ◽

Bo Xu

Keyword(s):

Fuzzy Control ◽

Constant Temperature ◽

Fuzzy Logic Controller ◽

Control Unit ◽

Bath Temperature ◽

Water Bath ◽

Dynamic Responses ◽

Test Operation ◽

Constant Temperature Water Bath ◽

Temperature Water

In the artificial rumen device constant temperature water bath temperature control for model and parameter uncertainty is proposed that 89S51 microcontroller as the control core, using fuzzy control algorithm, realized thermostatically control of water bath temperature. This paper presents the overall system architecture and design philosophy of fuzzy control unit and associated circuits. Systematic simulation and test operation showed that: the good dynamic responses of the system, high precision control, strong robustness, achieve better control of the water bath temperature.

Download Full-text

Fashion clothing with electromagnetic radiation protection: aesthetic properties and performance

Textile Research Journal ◽

10.1177/0040517520923047 ◽

2020 ◽

Vol 90 (21-22) ◽

pp. 2504-2521

Author(s):

Veronika Tunakova ◽

Maros Tunak ◽

Pavla Tesinova ◽

Marie Seidlova ◽

Jiri Prochazka

Keyword(s):

Electromagnetic Radiation ◽

Radiation Protection ◽

Electromagnetic Shielding ◽

Woven Fabric ◽

Digital Printing ◽

Color Fastness ◽

Shielding Effectiveness ◽

Metal Fiber ◽

Electrically Conductive ◽

Negative Effect

At present, much attention is focused on developing clothing fabrics with advanced functionality without compromising their visual, mechanical, or comfort properties. A fabric’s ability to prevent the penetration of electromagnetic radiation is an interesting added feature. In the published literature, there are many references describing the development and investigation of electromagnetic shielding textile structures using different electrically conductive additives. However, little attention has been given to the aesthetic and comfort properties of these special fabrics. Moreover, the availability of everyday fashion containing electromagnetic radiation protection is very limited. For this study, woven fabric made from a mixture of traditional fibers and extremely thin discrete stainless steel fibers developed in the authors’ previous research was used as a substrate. The fabric was digitally printed to provide an interesting design effect suitable for use in clothing and for making clothes for everyday wear. The main objective of this work is to determine whether digital printing is a suitable tool for changing the color and pattern of this metal fiber-containing fabric. The individual goals are (a) to examine the fabric’s color fastness to washing and (b) to investigate whether the surface modification of the fabric adversely affects its functionality. Results show that it is possible to change the color and pattern of metal fiber-containing fabric by digital printing easily, whereas the associated decrease of porosity causes an increase of this special fabric functionality. The electromagnetic shielding effectiveness of the fabric after printing is around 33 dB for frequency 1.5 GHz. However, washing has a negative effect, causing both the electromagnetic shielding ability decrease (to 27 dB for frequency 1.5 GHz after 20 washing and drying cycles) and color fading (the color fastness grade is around 1–2 after 20 washing and drying cycles). Furthermore, the basic transport properties of printed electrically conductive fabric are compared with those of fabric made from traditional material and positive results are found. The incidence of pilling after washing is also evaluated, whereas the first pills are observed after the eighth washing and drying cycle. Finally, clothing prototypes that could be prepared from printed fabric are presented.

Download Full-text

Preparation and Optimization of Waterborne Acrylic Core Microcapsules for Waterborne Wood Coatings and Comparison with Epoxy Resin Core

Polymers ◽

10.3390/polym12102366 ◽

2020 ◽

Vol 12 (10) ◽

pp. 2366 ◽

Cited By ~ 1

Author(s):

Xiaoxing Yan ◽

Yu Tao ◽

Xingyu Qian

Keyword(s):

In Situ Polymerization ◽

Urea Formaldehyde ◽

Paint Film ◽

Bath Temperature ◽

Water Bath ◽

Core Material ◽

Wall Material ◽

Formaldehyde Resin ◽

The Core ◽

Resin Core

Microcapsules were prepared by in situ polymerization with urea formaldehyde resin as the wall material and Dulux waterborne acrylic acid as the core material. The effects of the core–wall ratio, water bath temperature and depositing time on the morphology, particle size, yield and encapsulation ratio of microcapsules were investigated by orthogonal experiment of three factors and two levels. The results showed that the core–wall ratio had the greatest influence on the performance of microcapsules. When the core–wall ratio was 0.58:1, the water bath temperature was 70 °C, and the depositing time was 5 d, the microcapsule performance was the best. With the increase in depositing time, the yield of microcapsule particles increased gradually, and the microcapsules appeared to show an adhesive phenomenon. However, the long-term depositing time did not lead to complete deposition and agglomeration of microcapsules. When 10.0% concentration of the waterborne acrylic microcapsules with 0.58:1 of core–wall ratio was added to the coatings, the mechanical and optical properties of the coatings did not decrease significantly, but the elongation at break increased significantly. Therefore, this study offers a new prospect for using waterborne acrylic microcapsules to improve the toughness of waterborne paint film which can be cured at room temperature on a wood surface.

Download Full-text