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以芋头秸秆——芋叶柄为原料,采用预水解硫酸盐蒸煮法制备芋叶柄纤维浆粕。通过二煮二漂工艺,考察酸预水解、蒸煮及漂白的最佳工艺条件,对芋叶柄纤维浆粕进行α-纤维素含量测试、聚合度测试、白度测试、扫描电子显微镜(SEM)表征,结果表明:酸预水解最佳工艺条件为保温时间4h、温度130℃、酸用量4%(wt,质量百分数,下同)。蒸煮最佳工艺条件为碱用量35%、硫化度40%、蒽醌用量0.1%、保温时间4h。漂白工艺为一漂双氧水,二漂次氯酸钠。芋叶柄纤维浆粕表面纤维呈带状,不仅分离成单根状态,且纤维表面已经呈现出原纤化,有收缩起皱的现象,沟槽较多。芋叶柄纤维浆粕测试结果中α-纤维素的含量达到90.56%,白度68.8%,聚合度621.84。
Taro stalk - taro petiole as raw material, prepared by the pre-hydrolysis kraft cooking taro petiole fiber pulp. The optimum conditions of acid pre-hydrolysis, steaming and bleaching were investigated by two-boil-two-bleaching process. The content of α-cellulose, the degree of polymerization, the whiteness test and the scanning electron microscopy (SEM) The results showed that the optimal conditions of acid prehydrolysis were as follows: holding time 4h, temperature 130 ℃, acid dosage 4% (wt, mass percentage, the same below). The best cooking conditions for the amount of alkali 35%, 40% of the degree of sulfide, anthraquinone dosage 0.1%, holding time 4h. Bleaching process for a drift of hydrogen peroxide, two sodium hypochlorite. Taro stem fiber pulp surface fiber ribbon, not only separated into a single state, and the fiber surface has shown fibrillation, shrinkage wrinkles phenomenon, more grooves. Taro petiole fiber pulp test results in the α-cellulose content of 90.56%, whiteness 68.8%, degree of polymerization 621.84.