表面活性剂与仿生光催化氧化的协同效应

仿生光催化剂磺酸铁酞菁在可见光的照射下,能很好地发挥催化作用,使H2O2更有效地氧化孔雀绿模拟的印染废水,而废水中所含的表面活性剂,会与仿生光催化氧化产生协同作用.实验研究了三种不同的表面活性剂对仿生光催化氧化的影响,实验结果表明聚乙烯醇(PVA)、十二烷基苯磺酸钠(DBS)以及聚氧乙烯醚(OP-10)均与仿生光催化氧化产生协同效应.     

Synergistic antioxidant effect of nucleic acids and tocopherols

Nucleic acids acted as synergists with tocopherols in inhibiting the oxidation of methyl linoleate. DNA and RNA enhanced the activity of tocopherols to different extents in the order α->γ->δ-tocopherol. Nucleic acids decreased the rates of consumption of tocopherol in the presence of oxi-dizing methyl linoleate. Nucleic acids also decreased the rate of oxidation of tocopherols by PbO₂. The synergistic effect of nucleic acids seemed to be caused by hydrogen bond formation with tocopherols which protected toco-pherols from direct air oxidation.     

PESA与其他阻垢剂的协同效应

通过静态阻垢实验对PESA和其他阻垢剂的协同阻垢效应进行研究,发现对不同的水垢,PESA和不同的阻垢剂产生不同的协同作用。对碳酸钙垢,PESA与AA/AM/MA和HEDP有协同作用;对硫酸钙垢,PESA与PASP和PBTCA有协同作用。实验结果为PESA在工业领域的应用提供了参考。     

纳米级粉末橡胶协同阻燃HIPS

制备了纳米级丁苯粉末橡胶（牌号为VP101）／阻燃高抗冲聚苯乙烯（HIPS）体系,研究了w（VP101）和VP101的辐照剂量对阻燃体系的影响。结果表明,十溴二苯醚的质量分数为10％和w（VP101）为3％时,阻燃HIPS体系达到UL 94 V-0级。其中,辐照剂量为5kGy的VP101试样阻燃效果优于未辐照试样,且冲击强度得到了提高。扫描电子显微镜分析表明,VP101的加入提高了溴系阻燃剂在基体中的分散性。     

BFA的肥料增效功能及其意义

BFA作为添加剂,对有机肥、化肥都有明显的增效作用,对植物秸杆、残渣的深度发酵分解有独特的作用,把BFA原粉定位于肥料增效剂和土壤改良剂,对促进腐植酸行业的发展,对解决农业发展中面临的问题都有重要意义。     

Synergistic effect in low temperature co-pyrolysis of sugarcane bagasse and lignite

Sugarcane bagasse was co-pyrolyzed with lignite in a fixed bed reactor to investigate the possible interaction during co-pyrolysis. GC-MS revealed that the concentration of phenols and aliphatic compounds in the tar increased with the addition of sugarcane bagasse, while the content of aromatic compounds had the contradictory tendency. The phenol content in co-pyrolyzed tar reached 20.35%, which increased by 142.26% compared with the calculated values. The sugarcane bagasse decomposition peak partly overlapped with lignite pyrolysis peak from TG-DTG curves, which meant more interaction between lignite and sugarcane bagasse during the pyrolysis process. The difference between the experimental and calculated values of pyrolysis products yield, tar components, DTG values and kinetics analysis indicated the synergetic effect between lignite and sugarcane bagasse.     

大黄素和维生素C清除自由基的协同作用研究

研究了大黄素、维生素C、大黄素和维生素C混合体系清除羟基自由基和超氧阴离子自由基的能力。结果表明,大黄素对·OH和O2-·清除率为30.8%和68.78%;维生素C对·OH和O2-·的清除率为57.36%和72.65%;大黄素与维生素C混合后有协同作用,对·OH和O2-·的清除率可达到99.40%和93.38%。     

纳米材料复合泡沫缓速酸协同增效作用的研究

为了增加酸化压裂过程中酸液的刻蚀距离,增强作业效果,由纳米SiO_2和表面活性剂YEP-1和20%HCl制备了高效纳米泡沫缓速酸体系,研究纳米材料的表面性能、粒径等因素对表面活性剂在盐酸溶液中发泡性能的影响,测试了复合酸液体系的酸岩反应动力学参数和溶蚀速率。结果表明,采用粒径为20 nm的亲水型SiO_2纳米材料作为稳泡剂效果最佳,并使用两性表面活性剂YFP-1作为起泡剂,当SiO_2和YFP-1的质量分数分别为体系总质量0.5%和1.0%时,酸液起泡体积明显减小,泡沫更加致密,半衰期显著增大,复合酸液体系配比为20%HCl+1.0%YFP-1+0.5%SiO_2时,显著降低了岩芯动态溶蚀速率,为实现深部酸化提供了技术支持。     

正磷酸盐的阻垢协同作用研究

采用静态阻垢法、SEM、XRD分析技术研究了PO4^3-与三元共聚物AA/AMPS/HPA对CaCO3垢的作用.结果表明：单独的PO4^3-对CaCO3无任何阻垢作用;8～20mg/LAA/AMPS/HPA＋1～6mg/LPO4^3-在阻CaCO3垢时表现出显著的协同效应,当PO4^3-质量浓度超过6 mg/L时,两者阻CaCO3的阻垢率下降,协同效应也不明显.PO4^3-与AA/AMPS/HPA三元共聚物使CaCO3的形貌发生变化,对方解石的形成有明显的抑制作用.     

聚天冬氨酸与其它阻垢分散剂的协同效应

通过静态阻垢试验验证新型绿色生物可降解阻垢剂聚天冬氨酸是CaCO3,CaSO4·2H2O和BaSO4垢的优良阻垢剂.对聚天冬氨酸和其它阻垢分散剂的协同阻垢效应进行研究,发现对不同的水垢,聚天冬氨酸和不同的阻垢分散剂产生协同作用.对碳酸钙垢,聚天冬氨酸与聚马来酸酐、聚丙烯酸和羟基乙叉二膦酸有协同作用,对硫酸钙垢,聚天冬氨酸与聚环氧琥珀酸、聚丙烯酸和2-膦酸基-1,2,4三羟基丁烷有协同作用,对硫酸钡垢,聚天冬氨酸与聚环氧琥珀酸有协同作用.试验结果为聚天冬氨酸的工业应用提供了参考价值.     

纳米材料复合泡沫缓速酸协同增效作用的研究

为了增加酸化压裂过程中酸液的刻蚀距离,增强作业效果,由纳米SiO_2和表面活性剂YEP-1和20%HCl制备了高效纳米泡沫缓速酸体系,研究纳米材料的表面性能、粒径等因素对表面活性剂在盐酸溶液中发泡性能的影响,测试了复合酸液体系的酸岩反应动力学参数和溶蚀速率。结果表明,采用粒径为20 nm的亲水型SiO_2纳米材料作为稳泡剂效果最佳,并使用两性表面活性剂YFP-1作为起泡剂,当SiO_2和YFP-1的质量分数分别为体系总质量0.5%和1.0%时,酸液起泡体积明显减小,泡沫更加致密,半衰期显著增大,复合酸液体系配比为20%HCl+1.0%YFP-1+0.5%SiO_2时,显著降低了岩芯动态溶蚀速率,为实现深部酸化提供了技术支持。     

Synergistic catalytic effect in the hydrogenation of Victorian brown coals

Evidence is presented that a mixed metal catalyst system, which is predominantly iron-based with trace amounts of tin, displays a significant synergistic effect in the hydrogenation of Victorian brown coal, when compared with hydrogenation results using only iron- or tin-based catalysts of comparable metal concentrations to the mixed metal system.     

Synergistic effect of tolutriazol and sodium carboxylates on zinc corrosion in atmospheric conditions

During the transport or the storage, galvanized steel products undergo the wet storage stain phenomenon, leading to the formation of unsightly and extensive white rust of zinc. In the context of development of temporary protection to replace mineral oils, the present study is focused on the combined action of sodium heptanoate (CH₃(CH₂)₅COONa, noted NaC₇) and 3-methyl benzotriazol (named tolutriazol, TTA) on zinc corrosion. Stationary and dynamic electrochemical measurements have shown that the association of NaC₇ and TTA provokes the formation of insoluble and hydrophobic passive layer, and lead to a positive synergy between the anodic and cathodic inhibiting actions of the two respective compounds. According to XPS and MEB analysis, the protective material is a layer containing zinc cation, heptanoate anion and TTA molecules, formed by a mechanism of precipitation on the zinc surface. In accordance with the coordination properties between Zn²⁺ and TTA determined by pH titration, the TTA molecules is trapped in a zinc soap, probably in a compound, Zn(TTA)₂(C₇)₂, which explains the efficiency of this formulation in the climatic chamber test.     

氧化性采出水处理剂的协同除硫作用

为解决回注采出水中S2-去除困难、腐蚀严重等问题,以FeCl_3、聚合氯化铝和KMnO_4制成氧化性除硫剂CS-1,并通过正交试验及现场应用研究了除硫剂组成的影响、空气及氧化性杀菌剂的协同氧化作用。结果表明,各影响因素排序为曝氧时间聚合铝含量KMnO_4含量CPAM浓度。在最佳参数组合下,当除硫剂为30 mg/L时,室内模拟试验的除硫率达到91.97%;现场应用效果更好,除硫率达到97.9%,采出水的S2-低至0.7 mg/L,腐蚀速率同样达到采出水的回注标准要求。     

Synergistic effect of additives on bright nanocrystalline zinc electrodeposition

The influence of additives like cetyltrimethylammonium bromide (CTAB) and Ethyl vanillin (EV) on zinc electrodeposition from acid sulfate bath was systematically investigated by scanning electron microscopy, X-ray diffraction, and voltammetric techniques. The result shows the existence of interaction between CTAB and EV. They exhibited synergistic effect to produce bright nanocrystalline zinc coating on steel surface. The combined effects of these two compounds on deposition overpotential, hydrogen evolution, zinc ion diffusion, and surface coverage were discussed. The morphological and orientational changes occurred in electrodeposit were presented. Also the nucleation mechanism exhibited by zinc during electrodeposition in the presence of additive was examined.     

Synergistic effect of BSA on antioxidant activities in model food emulsions

Sunflower oil-in-water emulsions containing TBHQ, caffeic acid, epigallocatechin gallate (EGCG), or 6-hydroxy-2,5,7,8-tetramethylchroma-2-carboxylic acid (Trolox), both with and without BSA, were stored at 50 and 30°C. Oxidation of the oil was monitored by determination of the PV, conjugated diene content, and hexanal formation. Emulsions containing EGCG, caffeic acid, and, to a lesser extent, Trolox were much more stable during storage in the presence of BSA than in its absence even though BSA itself did not provide an antioxidant effect. BSA did not have a synergistic effect on the antioxidant activity of TBHQ. The BSA structure changed, with a considerable loss of fluorescent tryptophan groups during storage of solutions containing BSA and antioxidants, and a BSA-antioxidant adduct with radical-scavenging activity was formed. The highest radical-scavenging activity observed was for the isolated protein from a sample containing EGCG and BSA incubated at 30°C for 10 d. This fraction contained unchanged BSA as well as BSA-antioxidant adduct, but 95.7% of the initial fluorescence had been lost, showing that most of the BSA had been altered. It can be concluded that BSA exerts its synergistic effect with antioxidants because of formation of a protein-antioxidant adduct during storage, which is concentrated at the oil-water interface owing to the surface-active nature of the protein.     

磷系阻燃剂FR/APP协效阻燃PP

采用氧指数测定仪、热重分析仪和锥形量热仪研究了磷系阻燃剂1,3,5-三(5,5-二甲基-1,3-二氧杂环己内磷酸基)苯(FR)和聚磷酸铵(APP)复配体系对聚丙烯(PP)材料阻燃性能的影响.结果表明,FR/APP提高了PP的极限氧指数(LOI)、热稳定性和残炭率,降低了热释放速率.当w(FR)为15%和w(APP)为10%复配阻燃PP时,复合材料的LOI为29.6%.阻燃级别达到UL 94 V-0级.     

纳米碳酸钙和三元乙丙橡胶接枝马来酸酐协同增韧聚丙烯

纳米碳酸钙和三元乙丙橡胶接枝马来酸酐对聚丙烯具有显著的协同增韧作用,可能是因为纳米碳酸钙和三元乙丙橡胶接枝马来酸酐之间发生物理化学作用,形成一种新的核壳结构（硬核软壳）,与一般的核壳增韧剂（硬壳软核）完全不同。     

Synergistic effect of driers on soybean oil-based ceramer coatings

Inorganic-organic hybrid coatings were prepared using blown soybean oil with sol-gel precursors. Three sol-gel precursors, titanium tetra-i-propoxide (TIP), titanium (di-i-propoxide) bis (acetylacetonate) (TIA), and zirconium tetra-n-propoxide (ZrP) were used in conjunction with cobalt, manganese, and zirconium driers. The goal of this study was to investigate if a synergy exists between the drier and sol-gel precursors with respect to the autooxidation process. Various coating properties such as hardness, adhesion, reverse impact resistance, and flexibility were evaluated as a function of sol-gel precursor and drier content. Viscoelastic and tensile properties were also investigated. Department of Polymers and Coatings, Fargo, ND, 58105.     

腐殖酸协同Mn2+催化臭氧氧化降解五氯苯酚

研究了向Mn2+催化臭氧氧化体系中添加少量腐殖酸对PCP去除效率的影响。结果表明:腐殖酸与Mn2+在催化臭氧氧化降解PCP过程中存在着明显的协同效应。在ρ(PCP)=30 mg/L,n(HA)∶n(PCP)值为3.18的条件下,氧化反应30 min,PCP去除率高达98.63%。分别向Mn(Ⅱ)/O3+HA、Mn(Ⅱ)/O3、O3+HA及单独臭氧氧化体系中加入.OH自由基抑制剂叔丁醇后,各个氧化体系中PCP的降解效率均受到了不同程度的抑制。实验结果表明,Mn(Ⅱ)/O3+HA氧化降解PCP以自由基的氧化为主,其拟一级反应表观速率常数为0.133 min-1,分别是Mn(Ⅱ)/O3及单独臭氧氧化体系的1.87、8.31倍。