Urea co-precipitation 3.5 Uneven shape 1 μm method Inverse 40 ± 20 nm Irregular sheet-like structure 2 microemulsion technique Co-precipitation Non-uniform, round edged 3 20~150 nm method platelets Microwave-assisted Mixture of hexagonal 4 50~200 nm hydrothermal particles with rounded edges, method small rounded particles and rod-like particles Co-precipitation ~200 nm Round edged platelets 5 method Co-precipitation ~130 nm Irregular structure 6 method 3. Comparison of flame retardant performance of Zn-Al LDH coating with other materials reported in the previous literatures Table S3. Comparison of flame retardant performance of Zn-Al LDH coating with other materials reported in the previous literatures Type of Coating Type of Reduction Reduction References Matrix in PHRR in THR (%) (%) Chitosan and Flexible polyurethane 33 8 7 poly(phosphoric acid) foam Flexible Chitosan and poly(vinyl polyurethane 52 11 8 sulfonic acid sodium salt) foam
Urea co-precipitation method 3.5 μm Uneven shape 1 Inverse microemulsion technique 40 ± 20 nm Irregular sheet-like structure 2 Co-precipitation method 20~150 nm Non-uniform, round edged platelets 3 Microwave-assisted hydrothermal method 50~200 nm Mixture of hexagonal particles with rounded edges, small rounded particles and rod-like particles 4 Co-precipitation method ~200 nm Round edged platelets 5 Co-precipitation method ~130 nm Irregular structure 6 3. Comparison of flame retardant performance of Zn-Al LDH coating with other materials reported in the previous literatures Table S3. Comparison of flame retardant performance of Zn-Al LDH coating with other materials reported in the previous literatures Type of Coating Type of Matrix Reduction in PHRR (%) Reduction in THR (%) References Chitosan and poly(phosphoric acid) Flexible polyurethane foam 33 8 7 Chitosan and poly(vinyl sulfonic acid sodium salt) Flexible polyurethane foam 52 11 8
20180327210429942994.docx