Study on the Treatment of High Concentrated Industrial Wastewater Containing Phenol and Aldehyde with Fenton/UV Oxidation Method

酚醛树脂具有优越的综合性能，而且价格低廉，能制成多种产品，是重要的合成树脂之一。然而，在制备酚醛树脂时会产生大量的酚醛废水，废水组成复杂，含有多种难处理的有机物，而且有机物浓度高（即化学需氧量COD高），具有很强的毒性，直接排放将对环境产生很大的危害。采用一般的处理方法难以实现好的效果，芬顿试剂（Fenton）是由过氧化氢和亚铁离子组成的试剂，过氧化氢在亚铁离子的催化作用下氧化能力强，可以对多种难处理的有机物进行有效的氧化降解，但国内主要报道了用该试剂处理实验室模拟的含酚或者含醛废水，对实际工业酚醛废水的处理研究较少，对酚醛废水有机物氧化降解途径的探究也不够详细，而且废水处理的操作方法复杂，效...With the advantages of excellent comprehensive performance and low cost, phenolic resin is widely used with high yield. However, during the process of phenolic resin production, A large amount of high concentrated wastewater is also produced, components of which are very complex, containing both phenols and aldehydes, and the chemical oxygen demand (COD) can reach as high as tens of thousands mill...学位：理学硕士院系专业：材料学院_高分子化学与物理学号：2072012115005

Microstructural Dissection of Zinc Sulfide Thin Films

用X射线衍射和X射线光电子能谱技术，对分舟热蒸发法研制的掺铒（Er）硫化锌直流电致发光薄膜及硫化锌粉料进行剖析，获得薄膜表面及粉料的构态信息，讨论了影响微晶薄膜质量的主要因素。The zinc sulfide DCEL thin films doped with erbium, prepared by thermal evaporation with two boats, are analysed with XRD and XPS technologies. The structure state information of ZnS powder and thin film surface is obtained. The factors influencing on the quality of microcrystalline thin films are discussed as well.福建省自然科学基

Study on the Synthesis of Epoxy Polybutadiene Acrylate and UV Curing Shrinkage

针对紫外光固化胶黏剂固化收缩率较大的问题,合成了一种具有双重固化机理的预聚物——环氧聚丁二烯丙烯酸酯.通过控制变量,得到制备该预聚物的较为理想的合成条件.利用fT-Ir,1H-nMr对预聚物进行了表征,并测定了使用该预聚物的紫外光固化体系的固化收缩率.研究结果表明:在预聚物合成中,反应时间7H,丙烯酸质量分数在5%~20%时为宜;预聚物的环氧值为3.430%时固化效果较好;三苯基膦是较为理想的催化剂;预聚物、乙氧基乙氧基乙基丙烯酸酯(EOEOEA)和正丁基缩水甘油醚(bgE)质量比为60∶10∶25时,固化收缩率可达2.59%.In view of the large curing shrinkage of UV-curing system,a type of prepolymer that has dual curing mechanism,epoxy polybutadiene acrylate,was synthesized.An ideal synthesis condition was achieved by controlling variables.The prepolymer was characterized by FT-IR and 1H-NMR,and the curing shrinkage of this UV-curing system was also studied.The results showed that in the synthesis of prepolymer reaction time was about 7hand the dosage of acrylic acid was 5%-20%(by mass).When the exopy value of the prepolymer was 3.430%,the curing result was better.Triphenylphosphine was an ideal catalyst.In the UV curing when the mass ratio of prepolymer,2-(2-ethoxyethoxy)ethyl acrylate(EOEOEA),and butyl glycidyl ether(BGE),was 60∶10∶25,the curing shrinkage came to 2.59%

Studies on Curing Shrinkage of Liquid Optical Clear Adhesive

紫外光固化的液态光学胶固化过程中出现的体积收缩现象,严重影响其黏接强度和产品外观.系统研究了液态光学胶预聚物的种类、活性稀释剂的种类和用量、光引发剂的用量、光固化的类型等诸多因素对固化收缩率的影响.研究发现,以聚乙二醇二丙烯酸酯作为预聚物可明显降低固化收缩率.当添加的活性稀释剂官能度相同时,胶黏剂的固化收缩率随活性稀释剂相对分子质量的增加而减小;当活性稀释剂相对分子质量相近时,官能度增加,固化收缩率随之增大.而光引发剂的用量则对固化收缩率无明显影响.阳离子型胶黏剂的固化收缩率比自由基型的小,但硬度和黏接强度较低;而混杂型的固化收缩率则介于二者之间.The volume shrinkage during UV-curing of liquid optical clear adhesives(LOCA)had a serious effect on the adhesive strength and appearance of the product.In this paper,the effect of different factors,including types of active diluents,amounts of active diluents and photo-initiators,and UV-curing types,on the volume shrinkage for LOCA was systematically investigated.Based on the experiment,polyethylene glycol diacrylate as the prepolymer could significantly reduce the shrinkage.With the same functionality of the added active diluents,the shrinkage decreased when the molecular weights of the active diluents increased.When the molecular weights of active diluents were similar,the shrinkage increased with the increase of the functionality.The amount of photo-initiators had no significant effect on shrinkage.The shrinkage of cationic adhesives was smaller than that of radical adhesives,but the hardness and adhesion strength were relatively lower.The shrinkage of hybrid adhesives was in between in general

Synthesis of Ternary Polymer for ABS Coating Resin

用自由基溶液聚合法合成了苯乙烯-甲基丙烯酸丁酯-甲基丙烯酸甲酯三元共聚产物,作为AbS塑料专用涂料树脂.通过分子设计,选择单体种类,改变引发剂用量、反应时间、苯乙烯加料方式等条件,得出一系列共聚产物.用红外光谱仪、核磁共振波谱仪对分子结构进行表征,用凝胶渗透色谱仪进行相对分子质量的测定.通过核磁谱峰积分计算各单体的转化率,跟踪其在反应过程中的变化,分析共聚产物的链段组成均一性.最终合成耐热性较高,数均相对分子质量在2.5万~4万,单体总转化率在95%以上,且链段组成分布均匀的共聚产物.将其用于AbS转印涂料,附着性好,耐热性优良,满足工业需求.In this paper,styrene-butyl methacrylate-methyl methacrylate ternary polymer,which is used as ABS plastic coating resin,was synthesized with the radical solution polymerization.Through molecular design,a series of copolymers were obtained by choosing monomer species,changing initiator amount,reaction time and styrene feeding method.Molecular structure was characterized by infrared(IR)spectrometer and nuclear magnetic resonance(NMR)spectrometer.Molecular weight was determined using gel permeation chromatograph(GPC).The conversion of the monomer was calculated according to the NMR peak integral.Changes of the conversion were tracked during the reaction,and the segment composition uniformity of the copolymer product had been analyzed.Finally,agood heat-resisting ternary polymer product had been synthesized,of which the number-average molecular weight ranged from2.5×104 to 4.0×104.The overall conversion ratio of monomers reached over 95%,and the segment composition of the product was uniformly distributed.When applied as an ABS transfer coating,the product showed good adhesion,excellent heat resistance,and satisfied the industrial demand

Study on Activity Persistance of Polyester Polymercaptan Curing Agent

对比了聚醚型聚硫醇和2种聚酯型聚硫醇的活性寿命的差异.通过红外光谱、1 H-nMr和凝胶时间的测试表征聚硫醇的活性寿命.结果表明,以叔胺为促进剂时,以β-巯基丙酸为原料制备得到的聚酯型聚硫醇P(SH)6和聚醚型聚硫醇P(SH)3固化剂都有良好的活性寿命;而以α-巯基乙酸为原料制备得到的聚酯型聚硫醇P(SH)4固化剂存在活性下降的问题,2个月后完全失活.通过红外光谱、1 H-nMr表征活性下降前后其基团的变化提出了可能导致其活性下降的机理及解决的方法.The lifetime differences of polyether polymercaptans and two kinds of polyester polymercaptans were compared in this paper.The lifetime of polymercaptans curing agents was characterized by FT-IR,1 H-NMR and gelation time.The results revealed that polyester polymercaptans P(SH)6and polyether polymercaptans P(SH)3composed of 3-mercaptopropionic acid showed a long lifetime when using trialkylamine as accelerator,while polyester polymercaptans P(SH)4composed of 2-mercaptopropionic acid showed a decrease in curing activity and deactivated within two months.Possible mechanism of the decrease in curing activity was proposed based on the investigation of group changes during the deactivation by FT-IR and 1 H-NMR

Research on the Treatment of Highly Concentrated Phenolic Wastewater

采用fEnTOn系列方法处理高浓度酚醛废水,考察了各方法对化学需氧量(COd)去除率的影响.首先,确定了fEnTOn-uV氧化中H2O2溶液添加量、fE2+与H2O2摩尔比、PH值、光照时间等因素的较优水平;同时结果表明,将fEnTOn氧化法与超声和紫外光照射联用显著改善了处理效果,COd去除率可以达到90%以上;将絮凝法与fEnTOn-uV联用,聚丙烯酰胺加速絮状物沉淀,COd去除率达到70%左右;用红外和核磁手段表征酚醛废水经fEnTOn-uV氧化后的产物,证明fEnTOn-uV氧化法通过苯环侧链氧化断裂的主要途径进行.Several Fenton-related experiments were used to treat highly concentrated phenolic wastewater.Firstly,the optimal level of each factor in the Fenton-ultraviolet light experiment,such as the amount of H2O2,the mole ratio of Fe2+to H2O2,pH value and UV exposure time,was determined.The treatment effect obviously got improved when Fenton treatment was combined with ultrasonication and ultraviolet light irradiation,in which the removal efficiency of chemical oxygen demand(COD)could reach more than90%.In treating the phenolic wastewater by both flocculation and Fenton-UV,polyacrylamide could accelerate the sedimentary rate of the floccules and the COD removal efficiency was around 70%.Characterization of the flocculate emerging in the Fenton-UV oxidation using FT-IR and 1H-NMR methods proved that oxidation and degradation of the benzene ring′s side chains were the main way of Fenton-UV treatment

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel