Figures & data
Figure 2. From left to right: hydrogel, aerogel and carbon aerogel for a formaldehyde–lignin ratio of 1 (F/L 1)
![Figure 2. From left to right: hydrogel, aerogel and carbon aerogel for a formaldehyde–lignin ratio of 1 (F/L 1)](/cms/asset/9ee10cd6-745f-430e-bb96-b8a274ec8a5c/tbbp_a_1875616_f0002_oc.jpg)
Figure 3. Correlation of initial formaldehyde–lignin mass ratio (F/L) and the specific BET surface area (SBET) for the resulting aerogels
![Figure 3. Correlation of initial formaldehyde–lignin mass ratio (F/L) and the specific BET surface area (SBET) for the resulting aerogels](/cms/asset/a6388e8d-0b7e-4b9b-9ea8-f989409c26fe/tbbp_a_1875616_f0003_oc.jpg)
Table 1. Formaldehyde-lignin mass ratio (F/L) of each reaction mixture and specific BET surface area (SBET) of the respective aerogel and carbon aerogel
Figure 4. Pore size distributions of the aerogels (red) and carbon aerogels (black) made from solutions of varying formaldehyde–lignin mass ratios (F/L), where dP is the pore diameter and V the relative pore volume
![Figure 4. Pore size distributions of the aerogels (red) and carbon aerogels (black) made from solutions of varying formaldehyde–lignin mass ratios (F/L), where dP is the pore diameter and V the relative pore volume](/cms/asset/01e95a5f-db32-4d6c-bf7b-a8d07dfd1438/tbbp_a_1875616_f0004_oc.jpg)
Figure 5. Pore size distributions of the aerogels (red) and carbon aerogels (black) made from solutions of varying formaldehyde–lignin mass ratios (F/L), where dP is the pore diameter and V the relative pore volume
![Figure 5. Pore size distributions of the aerogels (red) and carbon aerogels (black) made from solutions of varying formaldehyde–lignin mass ratios (F/L), where dP is the pore diameter and V the relative pore volume](/cms/asset/0271062e-21d5-4761-bedc-7d47056bb088/tbbp_a_1875616_f0005_oc.jpg)
Figure 6. SEM image of the lignin–formaldehyde aerogel (F/L 2) before (left) and after (right) carbonization
![Figure 6. SEM image of the lignin–formaldehyde aerogel (F/L 2) before (left) and after (right) carbonization](/cms/asset/d2b64e09-2616-47ee-83b3-6dc0c5bda3b1/tbbp_a_1875616_f0006_b.gif)
Data availability statement
Data availability statement Data will be made available upon request to the corresponding author at [email protected]. https://www.wood-kplus.at/en.