一种孔径均匀的低密度高PPI三维网络结构聚氨酯海绵及其制备方法
By controlling the use of isocyanate-terminated prepolymers and surfactants, the growth of foam cells is regulated, and a three-dimensional network structure polyurethane sponge with uniform pore size, low density, and high PPI value is prepared. This solves the problems of uneven pore size and excessive density in the existing technology and is suitable for electrode materials for new energy batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUBEI SHIFENG NEW MATERIALS CO LTD
- Filing Date
- 2023-07-25
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to produce polyurethane foams with uniform pore size, low density, and high PPI value in a three-dimensional network structure, resulting in slow charging and discharging speeds, excessively high density, and uneven pore size.
By controlling the viscosity and NCO value of the isocyanate-terminated prepolymer, using supersaturated gas to form homogeneous nucleation sites, and combining the selection of surfactants and foaming agents, the pore size after cell growth termination can be controlled to prepare a three-dimensional network structure polyurethane foam with low density and high PPI value.
A high PPI polyurethane sponge with uniform pore size and low density was prepared, exhibiting good pore size uniformity and strength. It is suitable for electrode materials in new energy batteries, improving charging and discharging speed and corrosion resistance.