Thermal Requirement Analysis of Phase Change Protective Clothing in Low Temperature Environment

Li, Xiao Xiao; Sun, Yu; Xu, Jing; Chen, Rou Xi

doi:10.4028/www.scientific.net/amr.796.649

Cited by 3 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In low‐temperature environment, the lack of a proper protection can cause some human symptoms, such as cold, swelling, numb, and pain, which affect labor capacity and work efficiency, and even frostbite or death . It is inevitable to operate in ultra‐low‐temperature environment (−30 to − 80°C), such as store drugs, do some experiments and practice shooting, and the hand flexibility is the prerequisite for operation.…”

Section: Introductionmentioning

confidence: 99%

Design of a novel multilayer low‐temperature protection composite based on phase change microcapsules

Sun

Wang

Liu

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

It is necessary to develop a novel low-temperature protective material that ensures the flexibility and warmth of operation in a short time under the low-temperature environment (−30 to −80 C). Hence, a novel multilayer low-temperature protection composite (MPC) was prepared based on phase change microcapsules (microPCMs). MicroPCMs containing n-octadecane with melamine-urea-formaldehyde shell were successfully synthesized through in situ polymerization. Then the microPCMs were finished on the basic fabric's surface (biocomponent spunbond-spunlace nonwoven material) by foam coating and the silicone rubber was covered on the outermost surface. On the basis of scanning electron microscope (SEM) micrographs, microPCMs had a relatively spherical shape and a smooth surface, in which the average particle size was about 42.77 μm. The cross section morphology showed that the MPC was consisted of three layers structure including the base fabric, the microPCMs layer, and the silicone rubber layer. At −50 C, the low-temperature resistance time of the MPC was 727 s and the power consumption for maintaining a certain temperature for 10 and 20 min of the MPC were 350.86 and 1392.66 J, respectively. Compared with the basic fabric, which has the same thickness as the MPC, the low-temperature resistance time of the MPC was prolonged about 5 min and the power consumption of the MPC for 10 min decreased by 55%, and for 20 minutes decreased by 33%, respectively. The MPC could guarantee the low-temperature protection effect in short time. It could be applied as the potential materials in the area of low-temperature protection.

show abstract

Section: Introductionmentioning

confidence: 99%

Design of a novel multilayer low‐temperature protection composite based on phase change microcapsules

Sun

Wang

Liu

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…It is sometimes necessary to work in low-temperature environments, such as in low-temperature tests in the field of biomedicine, gun training for border guards in cold regions, and outdoor operation equipment for polar work. Although the time of some operation processes is short, it is still essential to wear protective products to avoid harm to the operator caused by low temperatures [1,2]. The prerequisite for the preparation of protective products is to choose proper thermoregulating materials.…”

Section: Introductionmentioning

confidence: 99%

The Design and Manufacture of a Multilayer Low-Temperature Protective Composite Fabric Based on Active Heating Materials and Passive Insulating Materials

Sun

Wang

et al. 2019

Polymers

View full text Add to dashboard Cite

Based on active heating materials (the phase change microcapsules (microPCMs)) and passive insulating materials (SiO2 aerogel), a new-type multilayer low temperature protective composite fabric (MPF) was designed and manufactured to meet the demands of protection and operation in a short time under a low-temperature environment. Results showed that the MPF consisted of three layers including the fabric layer, the microPCM function layer, and the SiO2 aerogel thermal insulation layer. The differential scanning calorimeter (DSC) results demonstrated that the phase transition enthalpy of the composite was 96.2 J/g during the cooling process. The low-temperature resistance and thermal insulation performance at −50 °C were investigated. The results also demonstrated that the low-temperature resistance time of the MPF was 660 s and the power consumption of the MPFs needed to maintain 37 °C for 10 and 20 min were 629 J and 1872 J, respectively. Compared with the microPCM function layer and the thermal insulation layer, which have the same thickness as the MPF, the low-temperature resistance time of the MPF was prolonged for about 2 and 3 min, respectively. The MPF could provide effective protection of the low-temperature work in a short time and could be applied as potential materials in low-temperature protection.

show abstract

“…These systems are designed to protect workers from extreme temperatures, both hot and cold. The effectiveness of thermal protective clothing is largely determined by its thermal resistance performance, flexibility, and moisture management capabilities (Li et al, 2013). Nonwoven fabrics are commonly used in such clothing systems, but they have limitations in terms of their thermal resistance and moisture management capabilities.…”

mentioning

confidence: 99%

Polyimide aerogel/aramid fiber composite with high mechanical strength and thermal insulation for thermal protective clothing

Liu,

Wang,

2023

Front. Mater.

View full text Add to dashboard Cite

Polyimide (PI) aerogel, as a new organic aerogel material, has the excellent thermal properties of polyimide and the characteristic of high thermal insulation of aerogels, and has gained increasing attention. In this work, using PI aerogel as the matrix material and aramid fiber as the reinforcement material, controllable flexible PI aerogel/aramid fiber composite insulation materials were successfully prepared by freeze-drying and soft treatment. This study sought to determine how the mass percentage of PI aerogel affected the microstructure, mechanical characteristics, thermal insulation capabilities, and thermal comfort of clothes in PI aerogel/aramid fiber composites. To achieve this, the preparation process of PI aerogel was optimized, and the effects of different mass fractions of PI aerogel on the properties of the composite material were evaluated. The results demonstrated that increasing the mass fraction of PI aerogel led to improvements in the mechanical properties, flexibility, and heat insulation properties of the composite material. Furthermore, the PI aerogel/aramid fiber composite offered enhanced thermal comfort to the wearer in hot and humid environments, indicating that the composite material is particularly suited for thermal insulation applications.

show abstract

Thermal Requirement Analysis of Phase Change Protective Clothing in Low Temperature Environment

Cited by 3 publications

References 3 publications

Design of a novel multilayer low‐temperature protection composite based on phase change microcapsules

Design of a novel multilayer low‐temperature protection composite based on phase change microcapsules

The Design and Manufacture of a Multilayer Low-Temperature Protective Composite Fabric Based on Active Heating Materials and Passive Insulating Materials

Polyimide aerogel/aramid fiber composite with high mechanical strength and thermal insulation for thermal protective clothing

Contact Info

Product

Resources

About