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不同废纸木质纤维素纤维的性能评价

DOI: 10.3969/j.issn.1006-7043.201311004

Keywords: 废纸, 木质纤维素纤维, 正交试验, 抗碱性, 吸水率, 纤维长度, 抗裂纤维

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Abstract:

木质纤维素纤维是世界上最大的可再生资源, 因其具有较好的吸水性和无定型结构, 被广泛应用于水泥基材料中。废纸的主要组成是木质纤维素纤维, 兼具了木质纤维素纤维自身的优势, 可以考虑作为水泥基材料抗裂纤维来使用。本文以废纸为原料、纤维长度为疏解效率指标, 采用正交试验方法确定了最佳的废纸疏解工艺, 并根据其特定使用领域, 有针对性的研究了几种废纸浆纤维制备的木质纤维素纤维抗碱性、吸水性及其形态尺寸的分布规律。研究结果表明:12%浆浓、温度60℃、疏解时间40 min,碎浆机转速300 r/min的试验条件下, 废纸纤维疏解效果最佳;在浓碱条件下, 几种再生纤维的α-纤维素得率均在70% 以上, 抗碱性能较好;新闻纸、牛皮纸和箱板纸浆再生纤维平均长度相近且高于办公纸浆纤维长度;4种木质纤维素纤维的吸水率均在自身重力的6倍左右, 基本满足水泥基材料的减缩抗裂使用要求。

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