添加羧甲基纤维素稳定酸性乳饮料胶体体系

从蛋白质化学与胶体化学的原理出发，根据生产实际情况，系统地探讨应用羧甲基纤维素稳定酸性乳饮料胶体体系的条件，提出解决酸性乳饮料沉淀问题的方法．结果表明，正确控制调酸混合顺序、混合温度、搅拌速度、混合液浓度等条件，有可能形成粒径足够小的羧甲基纤维素－酪蛋白颗粒的复合体，确立胶体体系稳定的基础．通过对羧甲基纤维纱素加量、体系ｐＨ值等溶液条件的正确控制，能确保形成稳定的羧甲基纤维素－酪蛋白复合体，有效地阻止酪蛋白颗粒间的聚焦沉淀，正确控制以上因素所生产的酸性乳饮料十分稳定     

HEC溶液中光催化还原金纳米粒子的制备与表征

文章通过光化学反应,以羟乙基纤维素(HEC)为还原剂和稳定剂制备了金纳米粒子,采用UV-Vis、TEM、FT-IR以及pH值跟踪等对反应过程和产物进行了分析表征。结果表明,氯金酸(HAuCl4)还原成金纳米粒子的反应在60 min内完成,FT-IR分析证实了HEC被氧化;金纳米粒子尺寸和紫外吸收峰的强度均与HEC溶液的质量分数有关,最后还考察了金离子的浓度对还原过程的影响。在紫外照射条件下HEC能够将金离子还原成具有独特钝角三角形、六边形和圆形等不同形状的粒子,并将其稳定在水溶液中。     

高沸醇溶剂法制备芒杆纤维素和木质素

为制备纤维素与木质素,以芒杆为原料,在75％～80％的1,4-丁二醇水溶液中添加少量助剂,并在190℃～ 210℃条件下反应150 min制备得到纤维素和高沸醇木质素．高沸醇溶剂法制得的纤维素可用于造纸及加工成其他 纤维素产品,高沸醇木质素较好地保持了木质素的化学活性,灰分含量低于木质素磺酸盐,通过进一步改性具有广 阔的应用前景．1,4-丁二醇可以回收循环使用．     

新型浓缩柱填料富集Cu2+和Pb2+的研究

采用一种新型的纤维型浓缩柱填料来富集水溶液中的Cu^2 、Pb^2 离子，详细讨论其富集条件和解吸条件。为了研究这种柱填料在实际应用中的可行性和重现性，还进行了精密度试验和回收率试验，并用低压离子色谱检测浓缩后的Cu^2 、Pb^2 离子浓度。试验结果表明，Cu^2 、Pb^2 离子在球形纤维素填料上的浓度缩效果取决于溶液的pH值，pH值越大，浓缩效果越好。方法的变异系数小于2．5％，回收率在97．6％和99．8％之间。由此可见，这种新型的浓缩柱填料可用于富集水溶液中的微量Cu^2 、Pu^2 离子。     

E4310纤维素焊条的研究

介绍了E430钎维素焊条配方材料的研究和开发.该焊条获得了改善的渣系,其渣系是TiO2 为主的TiO2-SiO-ZrO2-B2O5型.焊条的工艺性能和机械性能也得到改进,可与日本、美国、奥地利产品媲美.该焊条省级鉴定意见为国际先进水平.     

高纤维素型焊条研究评述

通过参阅国内外文献资料，结合试验研究，总结分析了高纤维素焊条研究中存在的主要技术难点以及可能的解决办法，提出了尚须深入研究的问题，为高纤维素型焊条的研究提供有益的参考和启示。     

Adsorption Equation and Adsorption Paramenter of Cellulase to Cellulose Fibres in Biofinishing

Adsorption isotherms for SF cellulase from Trichoderma pseudokoningii on cotton, flax and viscose yarns were investigated to provide information about cellulase-cellulose binding on different types of cellulosic fibres. The half-saturation constants and maximum adsorption constants suggest that SF cellulase has greater affinity for viscose than for cotton and greater affinity for cotton than for flax. It is suggested that this is related to the different crystallinities and microporous structures of these fibre types. The fraction of adsorbable protein in the total cellulase was found to be the same for each of the three cellulase substrates.     

分解纤维素菌HT3的筛选及酶活力测定

从不同榈中分离出能分解纤维素菌２９株，经复筛得到产纤维素酶活力较高菌有６株，其中ＨＴ３细菌酶活力最高。该菌产酶为胞外分泌，在最适条件下培养，酶活力可达５．１Ｕ。     

Interfacial interaction between polyurethane/poly (methacrylateco-styrene) coating and the regenerated cellulose film

Water-resistant films were prepared by coating the surface of regenerated cellulose films with castor oil-based polyurethane (PU)/ poly-(methacrylate-co-styrene) [P (MA-St)]. The effects of the ratio of PU to P (MA-St) copolymer on tensile strength (dry and wet states), vapor permeability, size stability, and water resistivity of the coated films were studied. The interfacial interaction between cellulose and the PU/P (MA-St) coating was analyzed using infrared (IR), ultraviolet (UV), scanning electron microscopy (SEM), transmission electron microscopy (TEM), differential thermal analysis (DTA), and electron probe microanalysis (EPMA). The results indicated that the mechanical properties and water resistivity of the coated films significantly enhanced, and the biodegradability was displayed, when the ratio of PU to P (MA-St) was 8∶2 by weight. The chemical bonds and hydrogen bonds between the cellulose, PU, and the copolymer exist in the coated films. It is regarded that PU/P (MA-St) semi-interpenetrating polymer networks (IPNs) were formed, and a shared network of PU with both the cellulose and the coating in the coated film occurred simultaneously resulting in a strong bonding between the coating layer and the film. Supported by the State Economy and Trade Commission of China Gong Ping: born in 1963, Ph. D candidate     

不同预处理对脱脂棉纤维形态和结构的影响研究

采用超声、DMAc、DMAc＋KMnO4、甲醇＋DMAc等四种不同的物理和化学方法对脱脂棉纤维进行预处理,并通过扫描电镜（SEM）及X射线衍射（XRD）等手段表征了处理前后脱脂棉纤维结构和形态的变化,其结构和形态随预处理方法的不同而发生不同变化.在这四种方法中以第三种DMAC＋KMnO4预处理的处理效果较好.