改性剂提高木质素磺酸钙性能研究

介绍了本质素磺酸钙改性剂的性能，研究了轻过改性剂改性后，它对混凝土性能的影响。     

木质素磺酸钠吸收烟道气中的SO2

本文就木质素磺酸钠溶液脱除烟道气中SO_2进行了实验研究。实验采用双搅拌气-液反应器,探讨了木质素磺酸钠的浓度、温度等因素对SO_2吸收的影响,并求取了化学吸收增强因子。结果表明,木质素磺酸钠能有效地脱除烟道气中的SO_2。     

Physicochemical behavior of mixed surfactant systems: Petroleum sulfonate and lignosulfonate

The physicochemical properties of mixed polymeric surfactant systems were studied with different techniques. A binary system consisting of lignosulfonate and petroleum sulfonate and a ternary system consisting of two different lignosulfonates and petroleum sulfonate were studied with respect to phase behavior, interfacial tension, specific conductivity, and pH measurements. In addition, the original lignosulfonates were subjected to ion exchange from sodium to calcium or vice versa, and the effects were investigated. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 860–865, 2003     

木质素磺酸钙/海藻酸钠渗透汽化膜的制备及性能调控

当前石化资源遇到储量有限、利用过程对环境不友好等挑战,生物质燃料乙醇作为一种替代性能源崭露头角。渗透汽化是一种分离乙醇的方式,节能、环保,开发天然高选择性渗透汽化膜成为研究热点之一。本文提出利用木质素磺酸钙（CaLS）的亲水性和成膜性,将其与天然多糖海藻酸钠（SA）进行共混,制备了不同CaLS含量的CaLS/SA交联膜。采用傅里叶红外、X射线衍射、接触角和扫描电子显微镜等方法对交联膜进行了表征和分析。结果表明,CaLS能与SA充分均匀混合,并且CaLS的加入能提高SA膜的亲水性。进一步考察了CaLS添加量和操作温度对10%水含量的乙醇溶液分离性能的影响,当CaLS/SA质量比为5%时,CaLS/SA交联膜分离因子达到2872,渗透通量达到796g/(m² · h),较纯SA膜分别提高了160%和70%,证实了CaLS在膜分离领域的应用潜力。     

木素磺酸盐缩合反应的研究

本文研究了木素磺酸盐与甲醛的缩合反应，探讨缩台前后木素磺酸盐物化性质的变化。研究结果表明，缩合产物的粘度和分子置随温度升高及反应时间的延长而增高，并随PH值的降低而增高。缩合反应的适宜条件为PH＜6，160～180℃，3h。缩合反应可提高木素磺酸盐的吸附性和分散性，缩合产物的吸附及分散能力随甲醛用量的增加而改善，在pH＝0.86～3及180℃时改性木素对无机盐的分散力最强。     

Photovoltaic solar electrochemical oxidation (PSEO) for treatment of lignosulfonate wastewater

BACKGROUND: Under the current global energy scenario, the need for self‐sustainable processes is encouraged. The photovoltaic solar powered electrochemical oxidation (PSEO) process has been developed to remove the organic matter from a lignosulfonate wastewater. RESULTS: An electrochemical reactor using boron‐doped diamond electrodes, in a batch configuration, is directly supplied with current from a set of photovoltaic solar modules. Experimental results show that the process can oxidize about 90% of the total organic carbon (TOC) of the organic matter in the wastewater under the described operating conditions. CONCLUSION: The technical suitability of the PSEO process has been demonstrated. A model to relate solar irradiance and electrical current was applied and used in a kinetic expression which depends on solar irradiance to describe the removal of TOC. Copyright © 2010 Society of Chemical Industry     

Synthesis and thermal properties of ester‐type crosslinked epoxy resins derived from lignosulfonate and glycerol

Among various biomass‐based components, both lignin and glycerol are important, since they are abundantly produced as by‐products in industrial processes. Accordingly, in the present study, new types of crosslinked epoxy resins were synthesized from lignin and glycerol. Polymers derived from two types of lignin‐based crosslinked epoxy resins were prepared through two‐step reactions, ester‐carboxylic acid derivative preparation followed by crosslinked epoxy resin preparation, in order to establish a crosslinked epoxy resin system in which glycerol units were included. The resins obtained were labeled as follows: series 1, lignosulfonate‐glycerol polyacid (Ser1LSGLYPA); and series 2, glycerol diglycidyl ether (Ser2GLYDGE). The functional groups of the resins were analyzed using Fourier transform infrared spectrometry. The thermal properties of the resins were analyzed using differential scanning calorimetry and thermogravimetry. The glass transition temperature of the crosslinked epoxy resins increased with increasing LSGLYPA and GLYDGE contents for Ser1LSGLYPA and Ser2GLYDGE, respectively. The thermal degradation temperature for Ser1LSGLYPA and Ser2GLYDGE did not show significant change, suggesting that the crosslinked epoxy resins were thermally stable. The mass residue at 500 °C was not affected by the changes of LSGLYPA and GLYDGE contents. Copyright © 2009 Society of Chemical Industry     

木质素胺脱色絮凝剂的合成研究

以木质素磺酸钙、二乙胺和环氧氯丙烷为原料,通过接枝氨基,合成了木质素胺脱色絮凝剂。研究了反应物料配比、活化时间、反应时间、反应温度等因素对合成的影响,优化出絮凝剂合成的工艺条件。并对其絮凝脱色性能进行了研究。     

季铵阳离子对木质素类水泥添加剂性能的影响

以广州造纸厂生产的MG减水剂为原料 ,通过离子交换法制备了五种季铵阳离子木质素磺酸盐 ,研究了它们对水泥净浆凝结时间和抗压强度的影响 ,并用扫描电镜对水泥净浆固结体的微观结构进行了观测     

木质素磺酸镁的改性及其对水泥的减水性能研究

以木质素磺酸镁溶液为原料，通过化学方法，分别引入了羟甲基、羧基、酰氨基、磺酸基等基因，以期增大木质素磺酸镁对水泥的分散作用和提高对混凝土的减水率。结果显示：引入羟甲基可提高木质素磺酸镁对水泥的分散效果，减水率为9．5％；而同时引入羟甲基和磺酸基的效果最好，减水离最高达19．0％。