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

摘要： 为了制备高白度的竹纤维，先用甲酸/乙酸/水预处理竹粉原料（记为A），再使用甲酸/乙酸/H₂O₂提取竹粉纤维素（记为A_p）；通过单因素分析法探讨了甲酸/乙酸比例、H₂O₂用量、固液比、反应温度及反应时间等因素对产品得率和白度的影响；然后在碱性条件下用H₂O₂进行TCF漂白（记为P），考察了NaOH用量、H₂O₂用量、固液比、反应温度和反应时间对产品得率和白度的影响；同时研究了多步处理工艺提取的效果，得到白度较高的纤维素产品。当A_p段工艺条件选取V（甲酸）：V（乙酸）=40：60，固液比1：10（g/mL），添加9%的H₂O₂溶液，先在60℃搅拌0.5h，再升温至90℃反应2h；且P段工艺条件选取H₂O₂用量为5%，NaOH用量为6%，固液比为1：10（g/mL），反应温度为90℃，反应时间为2h，在此条件下经AAA_pA_pPP处理得到的产品白度高达90.5%。

关键词: 竹粉, 甲酸, 乙酸, 全无氯清洁漂白技术, 纤维素