9 research outputs found
Numerical simulation and optimization of Al alloy cylinder body by low pressure die casting
Shrinkage defects can be formed easily at Critical location during low pressure die casting (LPDC) of aluminum alloy cylinder body. It has harmful effect on the products. Mold fi lling and solidifi cation process of a cylinder body was simulated by using of Z-CAST software. The casting method was improved based on the simulation results. In order to create effective feeding passage, the structure of casting was modifi ed by changing the location of strengthening ribs at the bottom, without causing any adverse effect on the part’s performance. Inserting copper billet at suitable location of the die is a valid way to create suitable solidifi cation sequence that is benefi cial to the feeding. Using these methods, the shrinkage defect was completely eliminated at the critical location
Hengtao Zhao's Quick Files
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Solution Blow Spinning Ultrafine Fiber Sponge-Loaded MOF-808 for Effective Adsorption and Degradation of Mustard Gas
Functional
materials that can quickly absorb and degrade mustard
gas are essential for chemical warfare emergency response kits. In
this study, a fiber membrane with excellent adsorption and catalytic
degradation activity was developed by solution blow spinning polystyrene
(PS)/polyurethane (PU) and hydrothermal in situ growth of a zirconium-based
MOF (MOF-808). The mechanical properties of the PS/PU fibers were
improved by adding a trimethylolpropane tris (2-methyl-1-aziridine
propionate) (TTMA) cross-linking agent. Moreover, the CO bonds
in TTMA provided abundant growth sites for MOF-808 in the hydrothermal
process, thereby greatly increasing the loading capacity. The fiber
surface was completely covered with the MOF-808 particles within 24
h. The PS/PU/TTMA/MOF-808 fiber membrane was used for the catalytic
degradation of 2-chloroethyl ethyl sulfide (CEES). The degradation
efficiency reached 97.7% after 72 h, indicating its great application
potential in emergency wiping cloths for mustard gas adsorption and
degradation
Solution Blow Spinning Ultrafine Fiber Sponge-Loaded MOF-808 for Effective Adsorption and Degradation of Mustard Gas
Functional
materials that can quickly absorb and degrade mustard
gas are essential for chemical warfare emergency response kits. In
this study, a fiber membrane with excellent adsorption and catalytic
degradation activity was developed by solution blow spinning polystyrene
(PS)/polyurethane (PU) and hydrothermal in situ growth of a zirconium-based
MOF (MOF-808). The mechanical properties of the PS/PU fibers were
improved by adding a trimethylolpropane tris (2-methyl-1-aziridine
propionate) (TTMA) cross-linking agent. Moreover, the CO bonds
in TTMA provided abundant growth sites for MOF-808 in the hydrothermal
process, thereby greatly increasing the loading capacity. The fiber
surface was completely covered with the MOF-808 particles within 24
h. The PS/PU/TTMA/MOF-808 fiber membrane was used for the catalytic
degradation of 2-chloroethyl ethyl sulfide (CEES). The degradation
efficiency reached 97.7% after 72 h, indicating its great application
potential in emergency wiping cloths for mustard gas adsorption and
degradation