漆酶和漆酶/介体体系对AOCC浆的改性和纤维表面变化

利用NS51003漆酶对美国旧瓦愣纸箱（AOCC）浆进行生物酶改性，研究了漆酶用量对AOCC浆强度性能的影响。研究结果表明，在最佳酶促反应条件下，即：浆料浓度5％；pH7；反应温度室温；反应时间1h；通空气时，漆酶最佳用量为16U／g。同时还发现，漆酶处理过程中加入介体（丁香酸甲酯MS）后，与单独用漆酶处理相比，AOCC浆的湿抗张强度和湿环压强度均得到进一步的明显提高，这说明介体MS对促进漆酶处理AOCC浆有显著的效果。对漆酶处理和空白的浆样与手抄片进行扫描电镜分析的结果表明，经过漆酶处理后，纤维表面状况发生了明显的变化。     

全亚麻卷烟纸的研制与开发

对亚麻纤维进行打浆、抄片,检测物理指标,根据抄片指标,制定出适合生产全亚麻卷烟纸的打浆工艺,根据生产车间工艺设备配置,对盘磨磨齿进行选择、对打浆功率进行调整,对打浆浓度、打浆度、湿质量进行控制,成功开发出预期目标的全亚麻卷烟纸.     

磁场处理纸浆料提高纸的机械强度的试验

本文总结了磁场处理纸浆料提高纸的机械强度的试验结果.通过多次重复试验,证明某一浓度、知浆度的纸浆料,在室温下以某一流速通过某一强度的磁场时切割磁力线,可使纸张的机械强度提高10—25%.这一成果若能推广到生产中,必将产生较大的经济效益.     

思茅松硫酸盐浆粮食包装袋纸的打浆工艺研究

针对粮食包装袋的特殊要求,研究了思茅松硫酸盐浆抄造粮食包装袋纸的打浆工艺.实验结果表明,打浆时间和打浆浓度对纸张的抗张强度、抗张能量吸收、伸长率、耐破度等都有一定程度的影响;思茅松硫酸盐浆在打浆浓度为16%时利用PFI磨打浆5,min时所抄纸页可以满足粮食包装袋纸的性能要求.以20%与5%的浓度组合进行组合打浆,更可取得较好的纸张韧性发展,同时获得良好的纸张撕裂强度和透气度性能,所制粮食包装袋纸具有较好的使用性能.     

REFINING BEHAVIOR OF BAMBOO LONG FIBER FRACTION PULP

Refining of pulp significantly contributes to papermaking process by affecting the runnability of the stock and quality of end product. The greater the production rates of a paper, the greater are the effects of machine downtime through breaks. A correct approach towards refining treatment is very essential for energy savings and product with desired properties. Papermakers are being encouraged to use non-wood fibres for a variety of reasons - the environment, changing agricultural policy and long-term fibre supply. Compared with wood fibres,there is less knowledge on how to treat non-wood fibres for optimum performance. Laboratory studies aimed at understanding the behaviour of unbleached bamboo long fibre fraction pulp on refining in Escher Wyss Laborefiner under simulated process conditions included investigations of the important parameters like wet web tensile, wet web elongation, water retention value and paper strength properties. The paper describes the influence of two specific edge loads, 1000 and 1500 Ws/km on refining of pulp.Bamboo long fibre fraction pulp responds better to lower intensity refining to develop pulp strength.     

REFINING BEHAVIOUR OF BAMBOO LONG FIBRE FRACTION PULP

The strength properties of a sheet of paper depend on the original qualities and strength of the fibres and to the extent of bonding between the fibres that make up the sheet. A paper sheet made from virgin pulp without beating/refining is characterized by low strength, bulkiness and rough surface. These undesirable characteristics can be changed to a large extent by treating the pulp mechanically. This mechanical treatment of fibres in water is termed beating/refining. The refining of any fib…     

4种竹材硫酸盐浆与马尾松木浆配抄纸袋纸和牛皮纸

对4种竹材硫酸盐浆与马尾松木浆配抄纸袋纸和牛皮纸进行了研究和比较。结果表明，慈竹最容易蒸煮而且纸浆得率和强度最高，桉竹次之，甜竹不如桉竹，麻竹最差。当竹浆配入量为20%时，慈竹浆和桉竹浆配抄的纸袋纸的强度比甜竹浆和麻竹浆配抄的纸袋纸高，其某些强度甚至比100%马尾松木浆抄造的纸袋纸还高；慈竹浆配抄的牛皮纸的各项强度较桉竹浆配抄的牛皮纸高，甚至超过100%马尾松木浆抄造的牛皮纸。     

非木纤维纸浆的抄造性能研究

非木纤维纸浆的抄造特性，是制约进一步开发利用非木纤维资源制浆造纸的原因之一．本研究以红麻杆、甘蔗渣、毛竹和芦苇等非木纤维原料为研究对象，从湿纸幅强度、湿纸幅粘附力和纸浆滤水性能等三个方面，较全面地分析了非木纤维纸浆的抄造特性；提出了用Ａ／Ｓ比概念描述湿纸幅特性的新观点，并对用ＳＦＲ和ＤＡＳ指数等描述纸浆的滤水性能进行了探讨．     

STUDY OF CARBOXYL METHYL STARCH ON PAPER STRENGTH

INTRODUCTIONIn China, there is not abundant of wood resourceNon-wood fiber materials, especially like wheastraw and reed, would still be considerably used araw materials of papermaking in a long period ofuture. However, wheat straw pulp and reed pulwith the problem of short fiber and many mixed celllead to the paper in low strength. So in thmanufacture of papermaking, more and moradditives are added to make up the deficiency. Ipapermaking industry, different types of starch anstarch deri…     

石南藤挥发油提取工艺研究

采用水蒸气蒸馏法对石南藤挥发油的提取工艺进行研究。以得油率为指标,以液料比、蒸馏时间、浸泡温度、浸泡时间为因素进行正交试验,得出最佳提取工艺为：液料比15：1,蒸馏时间1．5h,浸泡温度30℃,浸泡时间1h^[1],得油率为0．324％。     

USING ENZYME TO IMPROVE THE QUALITY OF SECONDARY FIBER

INTRODUCTIONIn recent years, the secondary fibers have played more important role in paper industry, especially for China, which has less forest area than other countries. However the recycled fibers have lower freeness and strengths than virgin fibers, and the low pulp freeness limits the speed at which the paper machine can operate, lower strengths limits the use of recycled fibers in fine paper [1].Many techniques have been studied for these defects. Refining or beating tends to optimi…     

高压静电场对马尾松,黑松种子活力的影响

结果表明经适宜高压静电场处理，能激活种子脱氢酶活性和α-淀粉酶活性、增加细胞膜修复功能、提高种子发芽率和活力指数。马尾松种子最佳处理为浸种6h，电场强度500kV／m，处理时间1min，黑松种子最佳处理为浸种6h，电场强度100kV／m，处理时间5min。     

高分子造纸助剂的设计及其作用机理Ⅲ.纸浆纤维电荷分布对N-Cl-PAM纸湿增强、助滤的影响

分析了漂白针叶木化学浆、针叶木机械浆、再生浆和漂白芦苇化学浆的总电荷、表面电荷量。讨论了它们对反应性聚丙烯酰胺纸张增强性能和助滤性能的影响。研究结果表明，浆的表面电荷越大，N－氯代聚丙烯酰胺呈现最大的纸湿增强效果和助滤效果所需的定着助剂PDADMAC的量也愈大。     

焦化防砂效果的影响因素分析

焦化防砂是一种防砂新技术 ,采取向地层内注入热空气使原油在高温下发生氧化裂解生成焦炭 ,从而将地层砂固结。通过实验的方法对影响焦化防砂效果的因素进行了分析。实验结果表明 ,注入热空气的最高温度是影响抗压强度的主要因素之一 ,只有在适宜的温度范围内 ,才能高效地得到固结的岩样 ;热空气达到预定的最高温度后 ,应该持续一定的时间 ,以保证一定的反应深度。化学反应前的温升速度与岩样抗压强度无关 ,在达到反应温度后维持足够的反应时间 ,所得岩样就能得到一定的抗压强度。空气流量越大 ,化学反应速度越快 ;当注入的空气量超过了化学反应所需的流量时 ,流量对抗压强度的影响不大。当反应生成适量的胶结物时 ,砂粒粒径越大 ,其固结抗压强度越高。此外 ,经过焦化处理的岩样的抗压强度还与砂粒粒度、油砂体积比、原油性质等因素有关。     

轻型装饰原纸的研制：助剂与工艺条件优选

在实验室条件下,以漂白硫酸盐针叶木浆与棉浆试制轻型装饰原纸。对WS-01,02,03湿强剂、三聚氰胺甲醛树脂、阳离子型与阴离子型聚丙烯酰胺和A-RA_1助留剂、A-DS_1干强剂以及不同类型的二氧化钛进行了优选试验。结果表明,WS-01湿强剂与A-DS_1干强剂配合使用,可以使轻型装饰原纸的干、湿强度、吸水高度与灰分含量达到规定的质量要求。试验确定了主要影响因素与优化工艺条件。     

毛竹碱性亚硫酸钠-蒽醌制浆的研究

<正>试验结果表明:亚硫酸钠对总碱(均以氧化钠计)最佳比率为0.85,总碱量为18％(以氧化钠计),蒽醌用量0.05％,液比为1:4,在最高温度(170℃)制浆时间需要3.5h,粗浆得率42～45％(比传统的硫酸盐法纸浆得率高4～6％)和卡伯值17～25,碱性亚硫酸钠-蒽醌制得竹浆的物理强度性质相当于硫酸盐竹浆的强度。     

ALKALINE PULP OF CORN STALKS

Pulping of corn stalks was studied in soda,soda-anthraquinone (AQ), kraft and kraft-AQ processes. The time, temperature and alkali concentration were varied in soda process. In respect to kappa number and pulp yield, 1 hour cooking at 1400C in 14% alkali were best conditions for corn stalks pulping. Pulp yield was increased by 5.5% and kappa number was reduced by 4.4 points with an addition of 0.05% AQ in the soda liquor. Breaking length was better in soda-AQ process than soda process but tear strength was inferior. In the kraft process, pulp yield was increased with increasing sulphidity and decreasing active alkali. The effectiveness of AQ in the low and high sulphidity kraft process was studied. Results showed that AQ was more effective in low sulphidity than high sulphidity. Strength properties in kraft processes were better than the soda and soda-AQ processes.     

静磁场作用下结晶器内金属射流行为的数值模拟

利用ANSYS CFX软件,数值模拟了在静磁场作用下连铸结晶器内的水口出流的金属射流行为,通过分析其形态变化,考察了不同参数下液面波动F数的变化规律以及金属射流的扩张对结晶器壁面的冲刷强度的影响规律.模拟结果表明:水口出流射流具有扩张特性,在静磁场作用下,随着磁感应强度的增大,F数增大,金属射流扩张程度增加,且对结晶器宽面冲刷强度增加;随着板坯厚度的增大,F数增大,金属射流扩张程度增加,且对结晶器宽面冲刷强度减小;随着射流角度的增加,F数减小,对结晶器宽面冲刷加剧;对于电磁制动板坯连铸,不能单纯以F数作为控制指标,应充分考虑射流扩张对结晶器壁面冲击的影响,不同板坯厚度和水口射流角度应有适宜的控制参数.     

纸张表面施胶剂的应用实验设计

利用DOE(Design of Experiment)实验设计方法中的Plackett-Burman和全因子设计方法,采用乳液聚合法,以酶转化淀粉作为乳化剂,以聚苯乙烯、丙烯酸和丙烯酸丁酯作为单体合成纸张表面施胶剂。结果表明：引发剂用量（A）、反应温度（B）、滴加时间（C）以及单体用量与反应温度的交互作用（AC）是影响成纸表面强度的关键因子;建立了纸张表面强度(S)与各关键因子之间的数学模型：S=-17375 0+196259A+15B+48375 0C-4125AC,并对数学模型进行了验证。最佳合成条件为:淀粉酶反应温度80 ℃,淀粉酶反应时间10 min,淀粉与单体质量比为1〖DK〗∶1,丙烯酸的质量分数为2 ％,单体苯乙烯与丙烯酸丁酯质量比为6〖DK〗∶1,引发剂H2O2与FeSO4质量比为1〖DK〗∶1。合成表面施胶剂的固含量（质量分数）为2613 %,黏度为283 mPa〖DK〗·s,玻璃化温度为7072 ℃。     

蓝莓花色苷超声辅助提取工艺优化及组分分析

通过单因素和Box-Behnken设计优化了最佳提取料液比、温度、时间条件,同时比较了最佳工艺条件下的超声辅助提取、传统酶法提取和静置提取的花色苷提取率及花色苷吸收光谱,并采用高效液相色谱（HPLC）分析了3种提取方法对花色苷组分的影响.结果表明：超声辅助提取最佳条件为提取时间119min,提取温度69.7℃,超声时间45.8min,稀释倍数7.8,预测得到花色苷的最大提取率为58.83±1.78%.在最优条件下,花色苷的提取率为58.64±0.32%,相对误差仅为0.95%,模型准确度高.超声辅助提取比传统酶法提取的花色苷提取率高12.96%.经HPLC分析,超声辅助提取提高了花色苷组分的提取率.