Effect of chitosan addition on the surface properties of kenaf (Hibiscus cannabinus) paper

The present paper studies the effect of chitosan, cationic starch and polyvinyl alcohol (PVA) as sizing agents to enhance surface properties of kenaf paper. The polymers were incorporated into the sheets by spray application. The results clearly showed that the addition of chitosan to a sheet formed from beaten fibers had excellent improvement in surface properties, compared to the effect of other additives. Sizing quality of cationic starch fairly matched with the sizing quality of chitosan, however, it was able to reduce the water absorption potential of paper more than chitosan at a same concentration. In most other properties, particularly the most important property for printing papers, surface smoothness, chitosan-sized papers are superior to the paper sized with cationic starch or PVA.     

Upgrading of hemp core for papermaking purposes by means of organosolv process

Non-wood raw materials for paper production have been maintained constant during last decade. In Europe, fibres from non-wood resources proceed mainly from flax and hemp crops. Hemp core is considered a by-product of the process, mainly used in equestrian sector. The application of these fibres for papermaking process gives a significant added value to the sector.New technologies in cooking processes like organosolv pulping gives advantages compared with traditional Kraft cooking. Hemp fibres obtained by means of organosolv process have been compared with eucalyptus Kraft pulp to determine if physical and mechanical properties of final pulps are similar.Efficiency of the organosolv cooking experiments was evaluated by means of yield, percentage of uncooked sample, kappa number and viscosity.To analyze the suitability of pulp samples for papermaking applications, different evaluation of mechanical properties as morphological characterization were done. Controlling cooking conditions of hemp core, similar properties of eucalyptus Kraft fibres are obtained.     

美国国际纸业公司林浆纸一体化的启示

美国国际纸业公司1898年成立以来,经过100多年不断的扩张和整合,已成为一个拥有纸产品、包装制品和林产品三大核心业务,集育苗、造林、森林经营、木材加工、产品营销和科研、生产为一体的大型跨国企业集团。其2004年销售总额达255亿美元,是世界上最大的纸业和林产品公司;同时拥有或经营着376万hm2森林、13个大型苗圃和21个种子园,年产优质松树苗3亿株,阔叶树苗8000多万株。文章介绍了其发展历程、森林经营、科技的贡献及对我国的启示。     

塔尔油制强化造纸施胶剂的研究

以塔尔油为主要原料，研究制造纸用施胶剂的配方及生产工艺条件，该施胶剂可代替松香用于造纸浆内施胶，并对施胶工艺条件进行了探讨。     

酵母在造纸法再造烟叶中的初步应用研究

在造纸法再造烟叶制备中,利用1种酵母微生物对烟梗原料的萃取液进行了处理,并对处理后的萃取浓缩液及其再造烟叶成品的烟碱、糖、氯、硝酸盐、钾、总氮等成分进行了测定。结果表明:利用酵母处理,在优化条件下,烟梗萃取浓缩液糖含量降至空白对照的一半,再造烟叶成品糖含量明显下降,糖碱比趋于更合理。对经处理后形成的再造烟叶进行感官质量评吸,结果表明:酵母具有明显提高造纸法再造烟叶整体吃味质量的作用。     

淀粉的改性及其处理废水的研究进展

详细介绍了淀粉的改性及其在印染废水和造纸废水中的应用,并对其在废水处理中的应用前景进行了展望。     

改性淀粉在CTMP和KP浆抄造箱纸板中的添加试验

采用对比法试验方式， 将阳离子改性淀粉添加到 Ｃ Ｔ Ｍ Ｐ和 Ｋ Ｐ浆抄造箱纸板中， 试验表明纸浆的非纤维成份对淀粉留着率产生影响， 添加阳离子淀粉可改善纸浆的纤维留着率和提高纸张的性能。     

植物滤器降解造纸废水效果研究

在营养液膜技术基础上构建以盘培多花黑麦草为主要内容的植物滤器系统,来降解浙江富阳一造纸厂的造纸废水。结果表明,植物滤器降解造纸废水效果明显,在系统运行30 d后,造纸废水的COD、BOD、SS和挥发酚分别降解了77%、86%、71.9%和80.3%。并且在运行前期降解幅度较大,而运行后期降解幅度相对较小。     

慈竹,黄竹纸浆竹林的培育及造纸研究

本文就我们自1983年以来,在宜宾县定向培育的以慈竹、黄竹为主的5万亩造纸竹林基地及造纸实践,阐述了三方面内容:一、初步提出了慈竹、黄竹造纸林营造、低改培育技术措施;二、对基地竹林采伐、制材、集运、贮存等的探讨;三、慈竹、黄竹制浆造纸应用研究。五万亩基地竹林,自1989年开始供材,在今后16年内共向厂方提供35万吨竹材,平均每年供材2.2万吨,为国家节约了大量木材,推动了造纸工业的发展。     

仿生合成的功能性纳米碳酸钙在造纸中的应用

采用仿生矿化原位合成淀粉改性纳米碳酸钙(MPCC),并将其应用于造纸技术当中.试验显示,使用该方法碳酸钙(PCC)可以被淀粉覆膜改性.填加原位生成的MPCC制备的手抄纸与填加PCC制备的手抄纸相比表面光滑度增大较多;在力学性能上,填加原位生成的MPCC的手抄纸普遍高于填加PCC制备的手抄纸;PCC的淀粉腹膜改性还可改善填料在手抄纸中的留着率,减少纸浆用量,降低生产成本.另外,仿生矿化原位合成功能性纳米碳酸钙技术在有机质改变碳酸钙表面性质的同时,还可以控制碳酸钙的晶体形貌和大小,这种技术可大大降低生产成本,增加造纸企业的经济效益.