Study On The Air And Humidity Permeability And Gas Sensing Function Of Medical Protective Clothing

In 2020,New Coronavirus broke out around the world.As a protective tool,medical protective clothing played a very important role in preventing virus infection and protecting personnel from infection.The comfort and versatility of medical protective clothing have been paid more and more attention.Because of the poor air permeability and humidity permeability,the medical protective clothing on the market will produce great discomfort after long-term wearing.Therefore,the medical protective clothing with good air permeability and moisture permeability becomes increasingly urgent.The development of wearable electronic technology has given clothing multi-function.It is of great significance to apply wearable gas sensor technology to medical protective clothing to detect the related gases in the surrounding environment to ensure the safety of users.One of the basic requirements of sensors applied in intelligent clothing is flexible wearability.In view of the above requirements,the research aims at the comfort of ventilation and moisture permeability of medical protective clothing and the multi-function of wearable gas sensor.The main work includes:The medical protective clothing fabric with good air permeability and moisture permeability was prepared by electrospinning technology.Polyvinylidene fluoride（PVDF）nanofiber membranes with nanofiber diameter can be prepared by electrospinning.The non-woven fabric and PVDF nanofiber membrane were prepared by hot pressing.The test results of the prepared medical protective clothing were tested according to the disposable medical protective clothing test standard GB/T 19082-2009.The results were up to standard.The air permeability and heat dissipation comparison test were carried out on the medical protective clothing fabrics and traditional medical protective clothing.The results showed that the air permeability and heat dissipation of the medical protective clothing fabric were excellent in traditional medical protective clothing,the medical protection made by electrospinning technology has better comfort.The high flexible waterproof conductor was prepared by twisting and conjugated spinning technology.The oxygen sensor,carbon dioxide sensor,VOC sensor,controling panel and display screen and lithium battery were connected flexibly.The protective clothing was integrated into the medical protective clothing which was ventilative and moisture permeable.The medical protective clothing can achieve the multi-function of monitoring the oxygen concentration,carbon dioxide concentration and VOC concentration of the surrounding environment.Flexible three electrode was prepared on flexible pet substrate by vacuum evaporation process,and 1-butyl-3-methylimidazolium hexafluorophosphate ionic liquid was synthesized as electrolyte.The flexible electrochemical oxygen sensor for smart clothing was prepared by flexible packaging process,including flexible electrode,ionic liquid electrolyte and permeable film.The results show that the response time T₉₀of the flexible electrochemical oxygen sensor is about 20 s;the linear fitting coefficient between the response current and oxygen concentration is 0.974;and it has good reversibility and repeatability in the range of 0%-60%oxygen concentration,the flexible electrochemical oxygen sensor can withstand at least 500 internal and external bending tests（bending angle 30°）;Through the life test,the sensing performance of the flexible electrochemical oxygen sensor is stable in at least 30 days,which is suitable for intelligent wearable.