不同树龄竹柳特性分析及其溶解浆纺丝工艺探究

Analysis on Characteristics of Bamboo Willow at Different Age and Study on Spinning Process of Dissolving Pulp

关键词:  竹柳  溶解浆  化学分析  预水解  漂白  纺丝

Key Words:bamboo willow  dissolving pulp  chemical analysis  pre-hydrolysis  bleaching  spinning

摘要:通过对不同树龄竹柳进行化学组分和纤维质量的分析，确定用于制浆的竹柳树龄。采用预水解、硫酸盐法蒸煮、ECF漂白等处理，研究了不同蒸煮条件对竹柳成浆性能的影响。通过对竹柳溶解浆成丝品质的检测，评价了竹柳溶解浆的纺丝性能。结果表明，3年生竹柳的应用价值较高，以其制备的溶解浆，预水解后多戊糖脱除率达56.31%，与桉木相当。经过总用碱量（Na₂O计）19%、硫化度18%的硫酸盐蒸煮后，竹柳成浆特性黏度605 mL/g，聚合度861。经D₀E_pD₁P四段ECF漂白后，竹柳溶解浆关键性能指标均满足行业标准中优等品的要求。竹柳溶解浆与常规商品阔叶木溶解浆无明显差异，纺丝后的黏胶过滤性能较好，丝束性能指标满足国家标准中合格品要求。

Abstract:By analyzing the chemical composition and fiber quality of bamboo willows at different age， the age of bamboo willow for pulping was determined. The effects of different cooking condition on the pulping properties of bamboo willow were studied by using pre-hydrolysis， sulfate cooking， ECF bleaching， and other treatments. The spinning performance of bamboo willow dissolving pulp was evaluated by testing the quality of tow produced by bamboo willow dissolving pulp. The results showed that the 3-year-old bamboo willow had high application value， after pre-hydrolysis， the removal rate of pentose of 3-year-old bamboo willow dissolving pulp reached 56.31%， which was quivalent to eucalyptus wood. After cooking with the total alkali content （Na₂O） of 19%， the degree of sulfide of 18%， the intrinsic viscosity of bamboo willow pulp was 605 mL/g， the degree of polymerization was 861. After D₀E_pD₁P four-stage of ECF bleaching， the key performance indices of bamboo willow dissolving pulp met the requirements of industry standards for high-quality products. There was no significant difference between bamboo willow dissolving pulp and conventional hardwood dissolving pulp. For bamboo willow dissolving pulp， the spun viscose had good filtration performance， the performance indices of the tow met the requirements of qualified products in national standards.