Cuf-C is used as a replacement to organic binders in the preparation of conductive inks. Cuf-C is applied to the cathode of lithium-ion batteries as conductive binder.

The formation mechanism of the crater-like surface of biaxially oriented polypropylene (BOPP) film remains controversial. To clarify this issue, in this work, three isotactic polypropylene (iPP) samples with different tacticities are selected to prepare BOPP films. It is shown that the relative beta crystal content (k(beta)) in the cast sheet increases with tacticity. The beta crystal transforms to the alpha crystal when stretched at 145 degrees C along the machine direction. For all the samples, rough surfaces are obtained even if the k(beta) value of the cast sheet is very low (k(beta) < 0.1). The arithmetic mean roughness (R-a) of the BOPP films increases with the increase of the k(beta) in the cast sheet. While higher k(beta) in the iPP cast sheet contributes to a higher R-a value, the beta crystallites hinder the enlargement of roughening rings, and cause surface defects (cavitation), which are detrimental to applications. Our results indicate that the beta crystal in the cast sheet is not essential for the crater formation and a higher beta crystal content is not always beneficial for BOPP capacitor films.

According to theoretical studies on ceramic/polymer composite dielectrics, the maximum achievable dielectric constant is observed in composites with a parallel structure connecting the ceramic and polymer phases. However, the practical preparation of parallel-structured composites poses significant challenges. Here, aimed at the theoretical model, we prepared a parallel-structured BaTiO3 (BT) skeleton through bidirectional freezing, and further prepared a parallel-structured BaTiO3/epoxy (BT/EP) composite through vacuum impregnation. When the electric field is completely parallel to the interfaces between BT and EP phases, the composites basically realize the ideal parallel structure and exhibit excellent dielectric properties. For example, the composite with 59 vol% BT content has an ultra-high dielectric constant of 2017 and shows a low loss of <0.02 at 1 kHz. Even at a low BT content of 18 vol%, the dielectric constant of the parallel-structured composite is still as high as 489 at 1 kHz. Based on the ultra-high dielectric constant of the parallel-structured composites, a high polarization intensity of 24.8 mu C cm(-2) and a discharge energy density of 13.4 x 10(-2) J cm(-3) are achieved at a low electric field of 4 kV mm(-1). Experiments and simulations demonstrated that the parallel arrangement along the direction of the electric field and the connectivity of the ceramic fillers are the key factors to realize the parallel structure. This work achieved the parallel structure described by the theoretical model and further clarified the relationship between the structure and dielectric properties of the composites.

The construction of multidimensional fillers provides new ideas for the development of composite materials. In this study, one-dimensional (La0.5Nb0.5)xTi1-xO2 ceramic nanorods (x-LNTO NRs) and 1-LNTO ceramic materials with three-dimensional fiber structure network (3D-1-LNTO) were prepared by electrospinning. These materials were used as fillers to prepare x-LNTO NRs/PVDF composites and 3D-1-LNTO/PVDF composites. Compared with the 1-LNTO NPs/PVDF composites, the 1-LNTO NRs/PVDF composites showed better dielectric properties, with a dielectric constant of 40 and a dielectric loss of 0.12 at a fill content of 60 wt%. The 3D-1-LNTO/PVDF composites achieved a high dielectric constant at a low filler content, the composite achieved a dielectric constant of 25 at a fill content of only 10 wt%, which is 2.5 times higher than that of pure PVDF. Compared with x-LNTO NRs, 3D-1-LNTO is more obvious for improving the dielectric properties of composites. The construction of continuous fiber network is the main reason for the enhancement of dielectric constant, and this study provides a new experimental idea for the construction of multi-dimensional high dielectric fillers.

The high-temperature dielectric properties and energy storage performance of capacitive materials are of great significance for the sustainable development of new energy-related fields. However, the most widely used commercial capacitor dielectric biaxially oriented polypropylene (BOPP) films fail to satisfy the requirements of continuous operation above 105 degrees C at high electric fields. Here we demonstrate a molecular semiconductor-grafted polypropylene (PP) composite that possesses substantially enhanced dielectric and capacitive performance up to 120 degrees C by virtue of the modulated carrier transport behavior. The organic molecular semiconductor [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) is chemically grafted onto PP chains (PCBM-g-PP) to achieve strong interaction and decent compatibility between the PCBM and the polymer matrix. Based on computational simulation and experimental verification, it is confirmed that the grafted molecular semiconductor introduces deep traps to inhibit the migration of high-energy charge carriers excited by heat. In the meantime, the grafting also helps to intensify the regulation effect by exerting positive influences on the microstructure of the polymer. The PCBM-g-PP/PP composite films possess reduced leakage current and dielectric loss, as well as suppressed electric field distortion and elevated breakdown strength. At 120 degrees C, the energy storage density of the composite with an efficiency above 90% reaches 1.59 J/cm3, which is 683.62% that of the original PP film. The reported molecular semiconductor-grafting strategy is expected to promote the capacitive performance of poly-propylene under hash-temperature conditions, facilitating the development of lightweight and compact-size dielectric capacitors. (c) 2023 Elsevier Ltd. All rights reserved.

Copper nanomaterials have remarkable application potential in electronic devices, catalysis, biological materials, and other fields, but their easy oxidation characteristics have become a problem in their practical application. Many antioxidant technologies have been developed. However, these technologies are usually accompanied by changes in physicochemical properties, complicated operations, and high costs. Here, we describe a method for simultaneously achieving controllable morphology synthesis and antioxidative preparation of copper nanomaterials through a single solvothermal reaction in a polar organic solvent environment with formate groups. The stability of one-step copper nanomaterials in different environments is monitored and compared with traditional copper nanomaterials. Notably, the two-dimensional copper nanomaterial Cu NSs-FA prepared by one-step method has a low initial resistance of 48 x 10-3 & omega;/sq, and the resistance only rises to 221 x 10-3 & omega;/sq after treatment in a harsh alkaline environment for 12 h, which is comparable to that of ordinary Cu NSs (379 x10- 3 & omega;/sq). The ratio reflects good environmental stability. This antioxidation strategy, which is suitable for a variety of copper nanomaterials, is simple to operate and has low cost, showing broad prospects in the practical application of copper nanomaterials.

Graphene conductive inks have attracted significant attention in recent years due to their high conductivity, corrosion resistance, and environmentally friendly nature. However, the dispersion of graphene in aqueous solution is still challenging. In this work, we synthesized an amphiphilic graft copolymer, polyvinyl alcohol-g-polyaniline (PVA-g-PANI), and studied the graphene dispersion prepared with the graft copolymer by high-speed shear dispersion. The amphiphilic graft copolymer can be used as a stabilizer and adhesive agent in graphene dispersion. Given the steric hindrance of the graft copolymer, the stability of graphene dispersion is improved by decreasing the probability of π–π stacking. PVA-g-PANI has a better stability on graphene dispersion than carboxymethylcellulose sodium (CMC-Na) and a mixture of PVA and PANI. The graft copolymer has only a slight effect on the conductivity of graphene dispersion due to the existence of conductive PANI, which is beneficial for preparing the graphene dispersion with good conductivity and adhesion. Graphene dispersion is well-adapted to screen printing and is very stable with regard to the sheet resistance bending cycle.

A scalable high-temperature capacitor film based on grafted polypropylene is synthesized by a water-solid phase suspension grafting method, exhibiting a discharged energy density above 90% efficiency of 4.5 J cm −3 at 125 °C after biaxial stretching.

通过同步双向拉伸方法制备了双向拉伸聚丙烯(BOPP)薄膜,研究了不同拉伸倍数下双向拉伸过程中BOPP薄膜的结构和性能演变.结果表明,双向拉伸过程中取向诱导结晶与取向过程中晶区的破碎并存,最终导致结晶度随双向拉伸倍数的增加变化不大;取向度随拉伸倍数的增加而显著增加,且较高的拉伸倍数下可以有效地减少薄膜中应力集中区域的面积,提升BOPP薄膜的取向均匀性;双向拉伸倍数的增加对BOPP薄膜力学性能影响显著.

大连(抚顺)石油化工研究院通过对煤间接制油分析表征,充分利用其硫、氮、芳烃含量低以及链烷烃含量高等特殊秉性,通过工艺条件的优选和催化剂的改进研究,开发了煤间接制油加氢精制、加氢裂化、异构脱蜡、分子可控合成以及长链烷烃发酵等系列高效利用成套技术,系列技术可以生产马达燃料和合成基础油、高链烷烃轻质白油、长链二元酸、液体石蜡、固体石蜡、特种蜡以及APIⅢ+类4cSt和6cSt润滑油高档基础油等高价值产品.高价值产品丰富了煤基间接制油产业链的产品品种,为企业调整产品结构,提高经济效益提供有效技术支持.

The high pressure hydrogenation process of naphthenic base fraction producing rubber plasticizer developed by Dalian Research Institute of Petroleum and Petrochemical（FRIPP） was introduced. Using naphthenic base fraction as raw material, the rubber plasticizer with excellent quality was produced by the combined process of hydrotreating, hydrodewaxing and hydrofinishing in a small hydrogenation reactor.The commercialization results show that under the reaction pressure of of standard +5.0 MPa, oil volume ratio of hydrogen 1,000, hydrotreating volume space velocity of standard, hydrodewaxing volume space velocity of standard+0.5 h -1 , hydrofinishing volume space velocity of standard+0.3 h -1 ,hydrotreating reaction temperature of standard+40 ℃, hydrodewaxing reaction temperature of standard+30 ℃ and hydrofinishing temperature of standard -40 ℃, rubber plasticizer products that meet the standard requirements can be produced.

总结了利用石油馏分生产低硫、低氮、低芳烃特种油产品的加氢技术及其工业应用和轻质白油标准制定系列成果.工业应用结果表明:以柴油馏分为原料,通过芳烃深度饱和工艺和配套催化剂,可生产芳烃质量分数小于0.03％的轻质白油,满足NB/SH/T 0913—2015Ⅱ类轻质白油产品标准;以减压蜡油为原料,采用加氢处理-异构脱蜡/补充精制组合技术,可生产Ⅱ/Ⅲ类润滑油基础油、橡胶填充油.此外,加氢基础油经过深度加氢精制可生产食品级白油产品和动物疫苗用白油.开发的系列特种油品生产技术和制定的轻质白油标准为石油行业的产业结构调整、"油转特"战略部署实施及企业提质增效提供了技术支撑,有助于早日实现"双碳"目标.

介绍了聚四氟乙烯微孔膜的制备工艺和造孔方法,并对其在医疗卫生领域的相关研究成果及应用情况进行了总结和综述,对聚四氟乙烯微孔膜行业未来的发展方向和机遇进行了探讨.

介绍了中国石化大连石油化工研究院开发的加氢柴油中压加氢工艺生产轻质白油技术.试验以加氢柴油为原料,在小型加氢反应装置采用加氢工艺生产低硫、低芳烃的轻质白油.工业应用结果表明,在反应压力为基准+0.4 MPa、氢油体积比为500:1、加氢精制反应温度为基准-36℃、基准体积空速的条件下,所得加氢生成油的芳烃质量分数都小于0.023％,满足行业标准NB/SH/T 0913—2015中轻质白油(Ⅱ)指标要求.

采用双向拉伸法制备了聚四氟乙烯(PTFE)微孔膜,利用扫描电子显微镜、差示扫描量热仪、X射线衍射仪和透气度仪分别研究了横向拉伸温度对微孔膜的微观形貌、熔融与结晶行为、取向和透气性能的影响.结果表明,PTFE微孔膜有明显的温度依赖性,横向拉伸温度升高,PTFE分子链活动能力增强,晶片更易解缠,因而微孔膜的原纤更容易被拉长,结点更容易被拉开,孔径变大.横向拉伸可降低微孔膜的取向度,但横向拉伸温度对微孔膜的熔融与结晶行为和取向行为影响较小.随着横向拉伸温度的提高,PTFE微孔膜的孔径变大,透气性能变好.

采用双向拉伸法制备了聚四氟乙烯(PTFE)微孔膜,研究了拉伸速率对微孔膜的微观形态、熔融-结晶行为、取向和透气性的影响.结果表明,通过双向拉伸法制备的具有典型"结点-微纤"结构的PTFE微孔膜,低温横向拉伸时,较高的拉伸速率更有利于微纤的拉伸,但拉伸速率对微孔膜的熔融-结晶行为和取向影响并不显著;随着拉伸速率的提高,微孔膜的透气性能有所提升.

介绍了大连(抚顺)石油化工研究院(FRIPP)开发的减压蜡油加氢处理-异构脱蜡-补充精制组合加氢工艺以及催化剂级配技术在某石化企业80万t·a-1特种油品生产装置中的工业应用.此工艺具有流程简洁、原料适应性强、产品种类多且生产方案灵活等特点,可以高效稳定生产性能优异的轻质白油、APIⅡ类、III类润滑油基础油和食品/医药级白油,实现了对重质油资源的充分利用以及生产高附加值产品.

A full hydrogenation process to produce API III+ lube base oil from F-T synthesis oil developed by Dalian research institute of petroleum and petrochemicals (FRIPP) was introduced. Taking heavy Fischer-Tropsch synthesis oil as raw material,API III+ lube base oil was produced in the small hydrogenation reactor by the hydrogenation process.The test results showed that low aromatic solvent naphtha and API III+ lube base oil were successfully produced from F-T synthesis oil with high wax content by catalyst grading and compound feeding under appropriate conditions.

The light white oil production technology developed by Dalian Research Institute of Petroleum and Petrochemicals (FRIPP) was introduced. The technology can produce light white oil and liquid paraffin from the light fraction of Fischer-Tropsch synthetic oil with hydrotreating process. The pilot scale production of the light white oil and liquid paraffin was carried out by an experimental hydrotreating device. The test results showed that oxides and olefins in light fraction of F-T synthetic oil were removed, and high quality light white oil and liquid paraffin were produced under appropriate conditions.

以两种环烷基减压馏分油为原料,对环烷基油生产橡胶填充油的两种主要的降凝工艺——临氢降凝和异构脱蜡进行了比较.试验结果表明,异构脱蜡工艺在目的产品收率及产品质量上均明显优于临氢降凝工艺,是加工环烷基减压馏分油的首选技术.