Experimental Design for 3 D Printing Geopolymer Adsorbent and Adsorption Properties Analysis
A systematic teaching experiment of 3D printing geopolymer adsorbents and adsorption properties is designed.The 3D printing model design,geopolymer inks synthesis,controllable molding of 3D printing adsorbent,adsorption property testing and mechanism analysis,regeneration performance tests of adsorbents are systematically explored based on direct ink writing.The results show that the introduction of kaolin can significantly improve the printability of geopolymer ink.And the foamed hexagonal honeycomb adsorbents are printed with a high degree of completion.The adsorption rate of methylene blue is controlled by both the intraparticle diffusion and the boundary liquid layer diffusion.And the adsorption mechanism includes electrostatic adsorption,hydrogen bonding and n-π interaction.The adsorbent regenerated by high-temperature oxidation treatment has a complete structure.The adsorption efficiency of methylene blue can still reach 94.23%after two cycles of testing,which has outstanding practical application potential.The teaching practice proves that this experiment can fully stimulate subjective initiative and help to cultivate ability of teamwork and analyzing and solving practical problems of students.
experimental designdirect ink writinggeopolymeradsorptionmethylene blue
NETL
NSTL
万方数据
