有机酸法生物质炼制原浆的造纸性能研究

以有机酸法生物质炼制过程副产物--桉木原浆为研究对象,通过测定桉木原浆的化学组成、纤维形态、打浆性能和成纸性能,对桉木原浆纤维的造纸性能进行评估。研究结果表明,相对于阔叶木KP浆,桉木原浆中纤维素含量较高,但半纤维素含量过低,打浆时纤维易切断,打浆度上升较快,不利于纤维层间结合力的提升;桉木原浆的纤维重均长度、长宽比和纤维强度均低于阔叶木KP浆和美废浆,影响了成纸的撕裂性能。另外,桉木原浆的纤维弯曲指数和扭结比例较低,细小纤维含量较高,使得桉木原浆的抗张强度、耐破强度和环压强度较好,适宜抄造瓦楞芯纸等包装用纸,可代替美废浆用于抄造对撕裂度要求不高的纸种。

Study on Papermaking Performance of Bio-refining Pulp with Organic Acid Process

Taking the by-product-eucalyptus pulp(EP)obtained after bio-refining with organic acid method as the research object,the papermaking properties of EP were evaluated with the analysis on chemical composition,fibre morphology,beating characteristics and paper strength.The results showed that,compared with hardwood kraft pulp,a higher cellulose content was obtained in EP.However,the low hemicellulose content in EP made the fibre easily cut during beating process,resulting in a rapid rise in beating degree,which was not conducive to the improvement of the inter-fibre bonding.Moreover,the weight-average fibre length,length-width ratio and fibre strength of EP were lower than that of hardwood kraft pulp and waste paper pulp,which affected the tear strength significantly.In addition,due to the low fibre curl index and kink index,and the high fine content,EP exhibited good tensile strength,burst strength and ring crush strength.Therefore,EP can be used as a substitute for waste paper pulp to make paper that does not require high tear performance.