Study On The Adsorption Property Of Kapok Nonwoven Fabric To Oil Medium

In daily life and industrial production,oil stains and soot exhaust gas will inevitably be generated.If discharged directly without treatment,it will cause harm to the human body and affect people's quality of life.Studies have shown that kapok fiber exhibits good oil absorption due to its natural large hollow structure,and has received widespread attention in the field of oil absorption.Therefore,this subject takes kapok nonwoven fabric as the main research object,and uses vegetable oil and motor oil to explore the structure and performance of kapok nonwoven fabric,oil and fume adsorption properties,respectively.Theoretical guidance.The main research contents and conclusions of this article are as follows:?1?Structure and performance of kapok nonwovenKapok nonwoven fabric and cotton nonwoven fabric,viscose nonwoven fabric,and viscose cotton nonwoven fabric were used to observe the surface morphology of the nonwoven fabric,and the pore size distribution,compression performance,and thermal stability of the nonwoven fabric were tested.In the kapok nonwoven fabric,the surface of the kapok fiber is smooth and has a round hollow structure;the kapok nonwoven fabric has a larger and larger pore diameter,the average pore diameter is 38.93mm;its compression work is 0.47 gf·cm·cm^-2,compression The elastic recovery rate is 50.67%,and the linearity of the compression curve is 0.17;the kapok fiber starts to decompose at 319.60?,and the mass loss is only 5.92%.In contrast,kapok nonwovens have more pores to absorb oil or oil fume,are easily compressed,and have better recovery after compression,the highest initial degradation temperature,and better thermal stability.?2?Microscopic adsorption properties of kapok nonwovensKapok nonwoven fabric and cotton,viscose,viscose cotton nonwoven fabric were used.The test oils were vegetable oil and motor oil.The test evaluated the non-woven vegetable oil,the contact angle of the motor oil,and the dynamics of the vegetable oil and motor oil when it was spread on the surface of the kapok nonwoven The contact angle changes with time;the wicking height and the wicking rate of the kapok nonwoven fabric that absorbs vegetable oil and motor oil in the longitudinal and transverse directions are analyzed;the surface energy of the kapok nonwoven fabric is calculated.The average contact angle of kapok nonwoven fabric with vegetable oil and motor oil are 52.75°and 43.75°,respectively.When vegetable oil and motor oil are spread on the surface of kapok nonwoven fabric,the relationship between dynamic contact angle and time satisfies a fixed relationship.The spreading rate over time Increasing but decreasing,the time for vegetable oil and motor oil to spread is 500ms and 2000ms respectively.In contrast,the spread rate of vegetable oil and motor oil of kapok nonwoven is the largest.The maximum wicking height of kapok non-woven fabric for vertical and horizontal adsorption of vegetable oil and motor oil is about 35mm and 25mm,respectively.The wicking rate of the vertical and horizontal oil is similar.In comparison,the kapok nonwovens reached the maximum wicking height at the earliest,and the maximum wicking height was the smallest.The surface energy of kapok nonwoven is 43.71 mN·m^-1,which is smaller than the surface energy of cotton and viscose cotton nonwovens.The dispersion component is 36.02 mN·m^-1 and the polar component is 7.70 mN·m^-1.?3?Effect of temperature on oil absorption properties of kapok nonwovensKapok non-woven fabric and cotton,viscose,viscose cotton non-woven fabric were used.The test oils were vegetable oil and motor oil.When the temperature was 20?,40?,60?and 80?,the vegetable oils in the vertical and horizontal directions were tested.The amount of oil absorption of engine oil and the influence of temperature on the oil absorption performance index of kapok nonwovens were analyzed.At a temperature of 20?,the capillary absorption coefficients C of vegetable oil and motor oil in the longitudinal direction of kapok nonwovens are 7.80E-3 g²·s^-1 and 1.36E-3 g²·s^-1,respectively;the vegetable oil and motor oil absorption ratios S in the longitudinal direction are respectively It is4.20 g·g^-1 and 4.14 g·g^-1,respectively;the saturated oil absorption time t_s of longitudinal vegetable oil and engine oil are 392.64 s and 2143.51 s,respectively.As the temperature rises,the capillary absorption coefficient C of vegetable oil and motor oil for kapok nonwovens generally increases.The capillary absorption coefficient at 80?is greater than the capillary absorption coefficient at20?.The absorption rate S of oil is basically maintained at 3.22 g·g^-15.12 g·g^-1;the saturated oil absorption time t_s of vegetable oil and engine oil decreases with the increase of temperature.Comparatively speaking,the kapok nonwoven vegetable oil and motor oil have a small capillary absorption coefficient C,and the absorption rate of vegetable oil and motor oil is slow;the saturated oil absorption time t_s of vegetable oil and motor oil is the largest,and the time to reach saturated oil absorption is the longest when the oil is absorbed.?4?Oil fume adsorption performance of kapok nonwoven fabricUsing kapok nonwoven fabric and cotton,viscose,viscose cotton non-woven fabric,test oils are vegetable oil and motor oil,and by setting up a fume device and fume collection device,simulate the scene of oil fume generation and collection,measure kapok nonwoven fabric and its To compare the amount of vegetable oil and motor oil fume adsorption at different times,explore the change of cumulative soot adsorption rate S_c,soot adsorption rate S_v,and soot adsorption efficiency S_e of kapok nonwovens.After the kapok nonwoven fabric absorbs oil fume,oil droplets are attached to the cavity,surface and fiber intersections of the kapok fiber.After cumulatively adsorbing oil fume for 10 hours,the cumulative absorption rates Sc of vegetable oil and machine oil for kapok nonwovens were86.83E-2 g·g^-1 and 279.27E-2 g·g^-1,respectively.S_c increased with time;vegetable oil and motor oil fume The adsorption rate S_v fluctuated around 3.98E-2 g·h^-1 and 13.24E-2 g·h^-1,respectively;the adsorption efficiencies of vegetable oil and motor oil fume S_e were 3.27%and 11.29%,respectively.