大麻韧皮纤维不同制浆方法纸浆性能的研究

Study on Pulp Properties of Different Pulping Methods of Hemp Bast Fiber

关键词:  工业大麻  韧皮纤维  制浆  打浆  纸张性能

Key Words:industrial hemp  bast fiber  pulping  beating  paper performance

摘要:本研究以工业大麻韧皮纤维为原料，首先对大麻韧皮纤维的化学组分及纤维形态进行分析，结果表明，工业大麻韧皮纤维具有很高的硝酸-乙醇纤维素含量，达70.6%，木素含量则比较低，只有9.6%；其纤维平均长度为20.47 mm，纤维平均宽度为22.50 μm，长宽比高达909.78，是优质的造纸原料。采用烧碱-蒽醌法（NaOH-AQ）、硫酸盐法（KP）以及碱性亚钠-蒽醌法（AS-AQ）3种不同的制浆方法制备大麻韧皮浆，对比研究了其在制浆性能、打浆特性和纸张物理性能方面的区别。结果表明，与大麻韧皮商品浆相比，AS-AQ制浆在制浆得率、纸浆白度、特性黏度和纸张物理强度性能方面均比NaOH-AQ法和KP法制浆有明显优势，因此，AS-AQ法是大麻韧皮纤维理想的制浆方法。

Abstract:In this paper， the bast fiber of industrial hemp was used as raw material. The chemical composition and fiber morphology were analyzed. The results showed that the industrial hemp fiber had a high content of nitrate-ethanol cellulose， reaching 70.6%， while the lignin content was relatively low， only 9.6%. The average length of the fiber was 20.47 mm， the average width of the fiber was 22.50 μm， and the length and width ratio was 909.78， which was a high quality raw material for paper making. Then three different methods of soda-anthraquinone （NaOH-AQ）， sulfate（KP） and alkaline subsodium-anthraquinone （AS-AQ） were used to prepare the pulp. Compared with commercial pulp， AS-AQ pulp had obvious advantages over NaOH-AQ pulp and KP pulp in terms of pulp yield， brightness， intrinsic viscosity and paper physical strength performance. So that AS-AQ was an ideal method for hemp bast fiber.