关键词: 竹粉, 甲酸, 乙酸, 全无氯清洁漂白技术, 纤维素

Abstract: To prepare the high whiteness bamboo fiber,the raw material,bamboo powder,was first pre-treated by formic acid/acetic acid/H₂O(symbol A). Then,the middle product bamboo cellulose was extracted by formic acid/acetic acid/H₂O₂(symbol A_p). The effect of formic acid/acetic acid volume ratio,H₂O₂ dosage,solid-liquid ratio(g/mL),reaction temperature and reaction time on the product yield and whiteness was analyzed using univariate analysis. After that,the effect of NaOH dosage,H₂O₂ dosage,solid-liquid ratio(g/mL),reaction temperature and reaction time on the product yield and whiteness were discussed in TCF bleaching with NaOH/H₂O₂ system(process P). Simultaneously,the influence of multi-step treatment to extract cellulose was investigated. When the volume ratio of Formic acid/Acetic acid was 40:60,solid-liquid ratio was 1:10(g/mL),and dosage of H₂O₂ solution was 9%(V%),the mixture was first stirred for 0.5h at 60℃,then the reaction temperature was raised to 90℃ and maintained for 2h Under the process condition of 5% H₂O₂,6% NaOH,solid-liquid ratio 1:10 (g/mL),stirring at 90℃ for 2h,the whiteness of the product by AAA_pA_pPP treatment was up to 90.5%.

Key words: bamboo powder, formic acid, acetic acid, TCF, cellulose