Study on the safety of chlorine dioxide precursor material

To study the safety performance of chlorine dioxide precursor materials (sodium chlorate, sodium chlorite, denoted by 0# and 1# respectively), friction and impact sensometer, spark sensometer and differential scanning calorimeter (Differential) Scanning Calorimetry (DSC), a comparative study of the mechanical sensitivity, electrostatic sensitivity and thermal safety of the two, and studied the effect of doping on the mechanical sensitivity and electrostatic sensitivity of the parent material. The results show that the undoped samples have higher mechanical safety and lower explosion risk. After doping resin, wood powder and grease, the logarithmic values of 0# sample characteristics were 1.642, 1.688, 1.758, respectively, and the explosion probabilities were 0.72, 0, 0.64, respectively; the logarithm of the 1# sample characteristics was 1.427, 1.354, respectively. 1.447, the explosion probability is 0.92, 0, 0.88. It can be seen that both of them have an explosion hazard and the mechanical sensitivity is improved. When the doping ratio of wood powder and 0#/1# sample is 1:10, 1:5, 1:2, respectively, with the increase of wood powder doping amount, the logarithm of 0# sample characteristic drop is reduced from 1.758 to 1.715. The probability of explosion increased from 0.64 to 0.8; the logarithm of the 1# sample characteristic height increased from 1.447 to 1.522, and the explosion probability increased from 0.88 to 1. According to this, as the doping ratio of wood powder to sample increases from 1:10 to 1:2, the impact sensitivity of 0# sample tends to increase, and the impact sensitivity of 1# sample tends to decrease, and the friction sensitivity of the two increases. . And 1# is more sensitive to impact and friction than 0# sample. Both samples and three kinds of dopants were insensitive to static electricity; in the range of 0~300 °C temperature rise, 0# sample had no exothermic peak, only one endothermic peak; 1# sample appeared two An exothermic peak, the initial exothermic temperatures were 167.00 ° C and 207.21 ° C, respectively, and the enthalpy changes were 519.795 6 J/g and 301.2525 8 J/g, respectively. This indicates that the 1# sample is prone to heat accumulation and causes thermal explosion; while the 0# sample is relatively safe and has high thermal safety performance within this temperature rise range.