Flame-retardant and corrosion-resistant fiber bamboo substrate and preparation method thereof

A process for preparing a flame-retardant and corrosion-resistant fiber bamboo substrate, comprising the following steps of:

• 1) cutting raw bamboo into bamboo filaments;
• 2) soaking the bamboo filaments prepared in Step 1) in aqueous solution of flame retardant;
• 3) drying:
• drying the flame-retardant treated bamboo filaments at 55° C. to 65° C. until the absolute water content is less than 12%;
• 4) carbonized pyrolysis:
• feeding the dried bamboo filaments from step 3) into a carbonized pyrolysis kiln, to be high-temperature treated according to a pyrolysis gradient, the pyrolysis gradient being as follows:
• heating the dried bamboo filaments to 110° C. within between 120 min and 300 min and then keeping the temperature unchanged at 110° C. for 60 min, heating to 190° C. from 110° C. within 200 min, and then keeping the temperature unchanged at 190° C. for 240 min;
• and, the carbonized pyrolysis kiln being heated by an electric heater or a heat transfer oil heater without feeding of steam or gas into the carbonized pyrolysis kiln;
• and
• 5) sequentially gumming, post-gumming drying, pressing, curing, and splitting to obtain a bamboo substrate, the gumming process being as follows:
• soaking the bamboo filaments treated by carbonized pyrolysis in Step 4), without a moisturization step or a drying step between Step 4 and 5 to adjust the absolute water content of the bamboo filaments, in aqueous solution of phenolic glue, taking the bamboo filaments out and drying;
• and the aqueous solution of phenolic glue being prepared from phenol glue and water at the mass ratio of 1:1-1.5.