Studies on Preparation and Properties of Proton Exchange Membranes Based on Phosphotungstic Acid/Silica and Polysulfonamide

Membranes formed by polysulfonamide (PSA) and phosphotungstic acid (PWA) supported on nano-silica have been prepared. Fourier transform infrared spectra (FTTR) and thermogravimctric analysis (TGA) were used to characterize the structure and thermal properties of obtained membranes. The analyses of water uptake, proton conductivity and mechanical properties of the membranes revealed that PWA and silica produced a beneficial effect on proton conduction of the membranes. The membranes with 50 wt% of PWA-SiQ2/PSA were mechanically stable and gave proton conductivity of 2. 57 × 10-2 S ?cm-1 at 90℃and 100% relative humidity. According to the obtained results, PWA and SiO2 doped PSA is a promising material for proton exchange membrane.     

制浆造纸工业废水厌氧生物处理的研究及应用现状

制浆造纸工业废水处理是世界性难题，尤其在我国显得更为突出。厌氧消化技术已成功地用于多种工业废水处理。本文综述了国内外厌氧生物反应器用于制浆造纸废水处理的研究和应用现状，对制浆造纸废水厌氧处理毒性及去毒方法进行了讨论。     

微波技术在竹浆漂白中的应用

用正交实验法探讨了在微波辐射下次氯酸钠漂白硫酸盐竹浆的工艺条件,结果表明,微波辐射用于硫酸盐竹浆次氯酸盐单段漂白的最佳工艺条件为:微波辐射功率480W,辐射时间2min,用氯量4.29%,氢氧化钠用量1%,浆料浓度12%.在此条件下,纸浆白度可达72.9%IS0;而在相同条件下达到此白度,传统水浴加热则需要90min的时间。因此,微波辐射竹浆次氟酸钠单段漂白能节约能源和提高生产效率.     

柑桔类果粒饮料的加工

介绍了柑桔类果粒饮料的加工方法。该种方法经济实用，适合于中小饮料厂，也适合于大规模生产     

APPLICATION OF CATIONIC POLYMERIC MICROPARTICLES ON RETENTION AND DRAINAGE

1.INTRODUCTIONThe microparticles retention and drainage technologywas brought in 1980s. It brings striking effect whenused in wet-end in paper-making. The retention offines and fillings and the drainage of pulp improved alot, meanwhile, the evenness also improved. So, mi-croparticles retention and drainage system is the maindeveloping direction of retention and drainage aids on paper-making industry.All microparticles in microparticle system we use currently are inorganic anionic. It rea…     

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…     

INFLUENCES OF BLAECHING ADDITIVES ON REED PULP FAST BLEACHING

SUMMARYWith the development of paper machine and the enlarger of cooking capability, higher requirement of bleaching system in paper mill is brought forward. At present, many straw-pulp mills completed single-stage hypochlorite bleaching through horizontal bleaching machine, which had the disadvantages of large area and low product ability. So there always was no enough space for paper mills to increase the product ability. Bleaching process became the key handicap to increase the product a…     

ON THE BLACK LIQUOR AND RECYCLE COOKING OF AS-AQ STRAW PULP

1.INTRODUCTIONAs a kind of agriculture residues, straw occupies an important status in the non-wood papermaking material in China. Straw is herbaceous plant yearly, and composed with successive and organized cell groups that is similar with others plants. The construction of straw fiber has three obvious layers and the sequence is lamella, primary wall and second wall. Because the organization is loosen andporous, the lignin content is lower and the cooking liquor is easer to penetrate so…