常见纺织浆料的生物降解性分析

通过对聚乙烯醇(PVA)、聚丙烯酰胺、聚丙烯酸、聚酯浆、淀粉等高分子浆料化学需氧量和生物需氧量分析,比较常见纺织浆料的生物降解性.结果表明,聚丙烯酰胺和原淀粉这两类浆料的生物降解性能较好,而PVA最难被生物降解,其他浆料对生态环境均有一定的污染.在经纱上浆时,应该尽量使用能够生物降解的纺织浆料.     

企业局域网病毒防护体系探讨

通过比较蠕虫病毒与一般病毒的区别,分析了蠕虫病毒的传播、攻击机制和目前企业的防治现状,介绍了一种企业局域网病毒防治方案。     

华北区域电力调峰辅助服务市场分析与运行评估

新能源大规模并网对电力市场设计与电力系统运行尤其是电力调峰带来了全新挑战.首先,提出在中国以燃煤为主的电源结构下开展华北调峰辅助服务市场建设的必要性;然后,从调峰服务申报、出清机制与结算机制等方面分析华北电力调峰市场机制设计;最后,结合2020年度华北电力调峰市场实际运行情况,从市场力及市场主体报价行为、市场出清及运行情况、市场社会效益3个层面构建调峰市场运行绩效评价指标体系,全面反映了调峰市场力、市场供需关系、市场运行有效性以及市场运行机构运营水平,为中国电力市场体系建设提供了有益参考.     

Development of a ZIF-91-Porous-Liquid-Based Composite Hydrogel Dressing System for Diabetic Wound Healing

Porous metal–organic framework (MOF) liquids with permanent porosity, good fluidity, and fine dispersion attract broad attention in catalysis, transportation, gas storage, and chemical separations. Yet, the design and synthesis of porous MOF liquids for drug delivery remain less explored. Herein, a simple and general strategy is reported to prepare ZIF-91 porous liquid (ZIF-91-PL) via surface modification and ion exchange. The cationic nature of ZIF-91-PL not only renders it antibacterial but also with high curcumin loading capacity and sustained release. More importantly, the acrylate group on the grafted side chain of ZIF-91-PL makes it feasible to crosslink with modified gelatin through light curing, and the obtained hydrogel shows a significantly improved healing effect on the wound of diabetes. This work demonstrates for the first time, a MOF-based porous liquid for drug delivery, and the further fabrication of composite hydrogel may have potential applications in biomedical science.     

All-cellulose films with excellent strength and toughness via a facile approach of dissolution–regeneration

This study describes a green method for preparing all-cellulose nanocomposites through a dissolution and regeneration process. Cotton linter pulp was dissolved in 7 wt % NaOH/12 wt % urea aqueous solution precooled to −12°C. Self-assembly of cellulose molecules into nanostructured cellulose fiber is achieved by using water addition and controlling the temperature to regenerate cellulose. By changing the microenvironment of the cellulose solution, the morphology of the nanostructured cellulose fibers and the mechanical properties of the regenerated cellulose films can be tuned. Then, a series of regenerated cellulose films have been prepared and characterized from various aspects. Compared with other all-cellulose films in the literature, the regenerated all-cellulose nanocomposite films prepared in this work exhibited good optical transparency, thermal stability, and excellent tensile strength (up to 135 MPa) when the regeneration temperature was adjusted to 50°C. This work provided a green and promising approach to prepare high-performance and environmentally friendly all-cellulose nanocomposites. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 46925.     

油田生产系统腐蚀监测技术

文留油田生产系统腐蚀状况、油田生产系统腐蚀监测的原则及监测网络的布点方式和腐蚀监 测的项目及监测方法,并分析了监测结果.     

Superhydrophobic polytetrafluoroethylene nanofiber membranes prepared by vacuum sintering and their application in vacuum membrane distillation

Electrospinning-sintering is a general strategy to fabricate polytetrafluoroethylene (PTFE) nanofibrous membranes. In this study, vacuum atmosphere was created in the sintering process to obtain pure PTFE fibers. The effect of vacuum pressure on fiber morphology and material component of the sintered membrane was investigated by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) characterization. A proper vacuum condition was believed to be beneficial to decrease poly(vinyl alcohol) residual and creating nanosize structures on the fiber surface, as porous, which contributes to a secondary roughness, while insignificantly influence membrane strength. As a result, the prepared membrane was superhydrophobicity with enhanced liquid entry pressure value. The anti-wetting property of the vacuum sintered membranes was further evaluated by vacuum membrane distillation process, and ensured the superior wetting resistance of the vacuum sintered PTFE membranes.     

文东油田气举油井腐蚀研究与防护技术

文东油田气举井由于其所处的生产环境及本身流态特点,腐蚀严重且具有其特殊规律.本文描述了气举井的腐蚀现状;分析了腐蚀影响因素;对气举井缓蚀剂性能进行了评价;介绍了腐蚀防护工艺.为相关油田(油井)腐蚀研究及防护提供了可借鉴的经验.     

用于纯棉热升华转移印花的聚酯乳液涂层剂

简要回顾了纯棉热升华转移印花的技术成果,针对现有方法中纯棉化学处理对环境的污染和膨化剂处理纯棉印花颜色不鲜艳的问题,提出采用聚酯乳液涂层实现纯棉织物热转移印花的新思路,分析了聚酯乳液涂层剂的结构特点及其对纯棉转移印花工艺的适应性,以及该技术的优缺点,阐明了该方法具有转印色彩鲜艳、保持棉纤维优点、工艺简单环保、便于推广应用的技术优势。