文献类型：期刊文献

中文题名：化学预浸渍工艺对杉木高浓盘磨解离性能的影响

英文题名：Effect of Chemical Pretreatment on the High-consistency Refining and Dissociation Behavior of Cunninghamia lanceolata(Lamb.)Hook.

作者：卢宇彬[1,2] 韩善明[1] 沈葵忠[1] 梁龙[1] 房桂干[1] 吴珽[1]

第一作者：卢宇彬

机构：[1]中国林业科学研究院林产化学工业研究所,江苏省生物质能源与材料重点实验室,国家林业和草原局林产化学工程重点实验室,林木生物质低碳高效利用国家工程研究中心,江苏省林业资源高效加工利用协同创新中心,江苏南京210042;[2]南京工业大学国际合作处,江苏南京211800

年份：2025

卷号：45

期号：6

起止页码：63-69

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：;北大核心:【北大核心2023】；

基金：中央财政林业科技推广示范资金项目(苏[2023]TG07)。

语种：中文

中文关键词：杉木;机械法制浆;化学预浸;碱性过氧化氢;纤维形貌

外文关键词：Cunninghamia lanceolata(Lamb.)Hook.;mechanical pulping;chemical pretreatment;alkaline hydrogen peroxide;fiber morphology

分类号：TQ35;TS743

摘要：采用碱性亚硫酸钠(AS)、亚硫酸钠(S)和碱性过氧化氢(AP)3种化学药剂对杉木进行预浸渍,通过磨浆能耗、浆料物理性能、纤维尺寸和纤维形貌的对比分析,探讨了化学预浸渍工艺对杉木高浓盘磨解离性能的影响。研究结果表明:从抗张指数角度比较,在3种化学预浸工艺中,AP工艺最为节能,当抗张指数为10 N·m/g时,与未添加化学浸渍药剂的盘磨机械浆(RMP)、AS和S工艺相比,其节能比例分别为38.4%、18.5%和10.7%。采用S工艺制取的浆料具有较高的松厚度。AP工艺则具有磨浆过程节能和改善浆料强度性能的效果,在加拿大游离度(CSF)为305 mL时,其抗张指数、耐破指数和撕裂指数分别为12.56 N·m/g、0.61 kPa·m^(2)/g和2.48 mN·m^(2)/g,较RMP工艺分别提高了120%、110%和70%。基于高浓盘磨解离过程纤维细胞壁的微观结构分析,提出其存在2种解离路径:其一,经S处理,纤维解离位置更多发生于复合胞间层(CML),后续磨浆时,CML破除后纤维次生壁才能够分丝帚化;其二,经AP处理后,纤维解离位置多发生于纤维次生壁层(主要为次生壁S2层),后续磨浆时纤维内部和外部的分丝帚化相对较为容易,有利于提高纤维间的结合能力。此外,化学预浸渍对磨浆过程纤维分离发生位置的影响,可能是AP工艺磨浆过程节能和浆料强度性能改进的原因。
Three chemical pretreatment methods—alkaline sulfite(AS),sulfite(S),and alkaline peroxide(AP)—were applied to Cunninghamia lanceolata,and their effects on refining dissociation behavior were evaluated through refining energy consumption,pulp physical properties,fiber size,and morphology.Results showed that,in terms of tensile index,the AP process was the most energy-efficient,achieving energy savings of 38.4%,18.5%,and 10.7%compared to refiner mechanical pulp(RMP),AS,and S processes,respectively,at a tensile index of 10 N·m/g.The S process resulted in pulp with higher bulk,while the AP process offered both energy efficiency and enhanced pulp strength:at 305 mL Canadian standard freeness(CSF),tensile,burst,and tear indices reached 12.56 N·m/g,0.61 kPa·m^(2)/g,and 2.48 mN·m^(2)/g,representing increases of 120%,110%,and 70%over the RMP process.Microstructural analysis of fiber cell walls during refining suggested two dissociation pathways:sulfite pretreatment caused separation mainly in the compound middle lamella(CML),requiring CML breakdown before fibrillation,whereas alkaline peroxide induced separation within the secondary wall(mainly the S2 layer),facilitating internal and external fibrillation and improving fiber bonding.This difference in separation location may explain the energy savings and strength improvements observed with alkaline peroxide pretreatment.