The elementary explore of multiple regression techniques about the fiberglass filter paper＇s influence on the PM2.5 assaying

The thesis had a deep research about the fiberglass filter paper＇s influence on the PM2.5 assaying. It has chosen XRF to make a quantitative analysis. Based on multiple regression theory it regard fiberglass filter paper＇s quality, element content and the quality of the loaded sample as independent variable, while the element＇s quality that the sample has collected as dependent variable. Furthermore, it has established four multiple quadric response surface models which concerning Ca by using of Mathematica and Matlab： Y = 0.8649-2.094x1-2.08x2 -1.375x3-10.58x1x2＋8.53x1x3＋1.549x2x3-3.443x1^2＋6.555x2^2＋6. 547x3^2; Y = 0.8649-2.094x1-2.08x2-1.375x3; Y = 0.8649 -2.094x2-2.08x2-1.375x3-3.443x1^2＋6.525x2^2＋6.547x3^2 ; Y =0.8649-2.094x1-2.08x2-1.375x3-10.58x1x2＋8.53x1x3＋1.549x2x3. After comparison it has finally found the best model. In combining with the sample it present a multiple data fitting analysis method which could adjust the fiberglass filter paper model accordingly.

Photocatalytic degradation of organochlorine compounds using TiO_2 supported on fiberglass cloth

The feasibility of photocatalytic degradation of organochlorine compounds using TiO 2 supported on fiberglass cloth as a photocatalyst was studied. The results showed that 2 0×10 -4 mol/dm 3 of dichloroethylene, trichloroethylene and tetrachloroethylene can be completely photocatalytically degraded within a short time under illumination with a 375W medium pressure mercury lamp. The effects of parameters such as illumination time, initial concentration of organochlorine compounds, amount of air flow and concentration of H 2O 2 on the photocatalytic degradation were investigated. The TiO 2 supported on the fiberglass was not easily detached and after 500h illumination there was no significant loss of photocatalytic activity of TiO 2. The passible mechanisms of photocatalytic degradation were discussed.

Protective Performance of Fiberglass Fabrics Coated by Silicone Resin Mixed with Nature Filler Powders

The coated fiberglass fabric was prepared to protect personnel and equipment from sparks, heat, and molten metals during hot work projects. Ferric oxide powder 2%,mica powder6%,wollastonite powder 4%,and white carbon black 8% were added in the phenyl methyl silicone to prepare the composite silicone solution. The french chalk and coupling agent can effectively solve the deposition of fillers in the coating solution. Compared with the original fiberglass fabric,heat resistance of the coated fabric under high temperature was greatly improved, and the temperature limitation in short period was higher than 900℃. Horizontal flammability tests showed that the coated fabric was non-combustible with no melting and no fragments. The temperature for long period usage of coated fabric was lower than 500 ℃. Welding drop test showed that the coating could prevent the molten metals,sparks and heat from transferring in the fabric. Test for toxic gas release showed that the toxic gases such as HCN,SO_2,HCl,and HF were not detected,only CO( 100 mg / m^3) and NO( 12 mg /m^3) were detected,and their concentrations were far lower than the limitation values CO( 4 375 mg / m^3) and NO( 134 mg /m^3). The breaking strength of coated fabric was almost twice the strength of the original fabric,and the coated surface had good water and oil repellency.

Discussion on the Key Properties of Fiberglass Tubing Used in Oilfield

CNPC implements the call of energy conservation and emission reduction, and promotes the application of new energy conservation and emission reduction technologies and new products to achieve production and reduce pollution. As China’s oilfields enter the period of high water cut development, corrosion problem and scale formation ordinary steel tubing are becoming more and more serious in oilfield application, which influence and restrict the production and development and bring about energy waste. FRP tubing has been widely used in oil and gas fields because of its excellent corrosion resistance, small friction coefficient and less wear. With the gradual popularization of FRP tubing in oilfields, failure cases also show a growing trend as threaded release, leakage, fracture and so on, which affect the normal production of oilfields. In this paper, a series of key performance properties affecting service performance of high-pressure FRP tubing are tested which took from common failure cases. The key properties of FRP tubing, such as unloading, anti-collapse, short-term failure pressure at high ambient temperature and high ambient temperature axial tension, are tested in the research. The article provides a scientific basis for applicability evaluation of FRP tubing. This research has important significance for energy saving, decreasing pollution and safe operation of tubing pipes. Several suggestions are put forward on material selection and design of FRP tubing.

Silica-quaternary ammonium “Fixed-Quat” nanofilm coated fiberglass mesh for water disinfection and harmful algal blooms control

Intensification of pollution loading worldwide has promoted an escalation of different types of disease-causing microorganisms, such as harmful algal blooms(HABs), instigating detrimental impacts on the quality of receiving surface waters. Formation of unwanted disinfection by-products(DBPs) resulting from conventional disinfection technologies reveals the need for the development of new sustainable alternatives. Quaternary Ammonium Compounds(QACs) are cationic surfactants widely known for their effective biocidal properties at the ppm level. In this study, a novel silica-based antimicrobial nanofilm was developed using a composite of silica-modified QAC(Fixed-Quat) and applied to a fiberglass mesh as an active surface via sol–gel technique. The synthesized Fixed-Quat nanocoating was found to be effective against E. coli with an inactivation rate of 1.3 × 10^(-3) log reduction/cm min. The Fixed-Quat coated fiberglass mesh also demonstrated successful control of Microcystis aeruginosa with more than 99% inactivation after 10 hr of exposure.The developed antimicrobial mesh was also evaluated with wild-type microalgal species collected in a water body experiencing HABs, obtaining a 97% removal efficiency. Overall,the silica-functionalized Fixed-Quat nanocoating showed promising antimicrobial properties for water disinfection and HABs control, while decreasing concerns related to DBPs formation and the possible release of toxic nanomaterials into the environment.

交通载荷作用下埋地含缺陷玻璃钢管道力学行为研究

为分析含缺陷玻璃钢管道在交通载荷作用下的力学行为,基于ABAQUS有限元软件建立了含不同形状缺陷管道模型和不同埋深管土模型,研究了不同埋深、不同载荷及缺陷深度对管道不同层中截面沿环向应力分布规律的影响。结果表明,无缺陷管道各层应力分布均匀,含缺陷管道内区域层应力沿管材缠绕方向集中于缺陷对称角处;管道仅含轴向缺陷时管体应力峰值与应力突变幅度最大;缺陷相对深度对管道应力峰值影响较大。

胶粘剂粘度对CR/玻纤布复合胶布粘接性能的影响

针对氯丁橡胶和玻纤布的复合胶布,研究了胶粘剂粘度对复合胶布层间粘合强度和拉伸剪切强度的影响,并进行了分析。结果表明,随着胶粘剂粘度的逐渐降低,复合胶布的层间粘合强度和拉伸剪切强度先提高后降低,当胶粘剂流出时间为40~35 s时达到峰值。复合胶布的层间粘合试样破坏界面SEM显示,不同胶粘剂粘度试样的破坏界面呈现明显的差异。随着胶粘剂粘度的降低,6层复合胶布与金属轮之间的粘合强度同样呈现先提高后降低的现象,与复合胶布的层间粘合强度和拉伸剪切强度变化趋势一致。

胶粘剂用量对CR/玻纤布复合胶布粘接性能的影响

针对氯丁橡胶(CR)和玻纤布压延成的薄层复合胶布,研究了玻纤布涂覆胶粘剂的用量对复合胶布层间粘合强度和拉伸剪切强度的影响。结果表明,随着玻纤布上胶量的逐渐增多,复合胶布的层间粘合强度和拉伸剪切强度先提高后降低,当胶粘剂用量为20%时,达到峰值;SEM照片显示,不同上胶量复合胶布的破坏界面呈现出明显的差异,阐明了胶布的层间粘合强度和拉伸剪切强度所呈变化趋势的原因;玻纤布、CR及复合胶布层间粘合破坏界面的的红外谱图与SEM照片吻合,进一步证明了复合胶布的层间粘合强度和拉伸剪切强度变化的趋势。

Ⅳ型LPG气瓶冲击试验的国内外标准探讨

T/CATSI 02005—2019《液化石油气高密度聚乙烯内胆玻璃纤维全缠绕气瓶》的编制是在理论分析和研究的基础上,修改采用了EN14427:2014《液化石油气设备及配件用于液化石油气的可运输的可充填全封闭复合气瓶设计和施工》有关热塑性非金属内胆全缠绕气瓶部分制定的。通过对冲击试验结果进行分析来探讨T/CATSI 02005—2019和EN14427:2014两个标准的差异性。建议在不影响试验结果的前提下优化试验方法,验证气瓶受外来物体冲击后的抗冲击性能,同时保障试验过程中的生命、财产安全。

玻璃钢撑杆浮球式多功能筏式养殖平台与装备的研究(下)

玻璃钢撑杆浮球式多功能筏式养殖平台由多根横向、纵向玻璃钢撑杆按矩阵排列分布组成,横向及纵向间距均不小于6 m。对紫菜牡蛎养殖设施、混养轮养养殖工艺、防缠绕自伸缩吊绳装置、牡蛎塑型养殖笼、液压驱动生蚝作业平台及养殖物联网系统进行了研究。玻璃钢撑杆浮球式多功能筏式养殖平台的研究可有效提高养殖效益、提升养殖产品品质、实时掌控养殖相关信息并减少养殖户日常出海巡查次数。

纤维复合材料在调水工程长输管道中的应用

调水工程长距离输水管道的材料选择,对工程成本和输水线路的安全有着重要影响。纤维复合材料具有轻质高强、内壁光滑、耐腐蚀性好等特点,正逐步应用在输水管道中。文章分析了影响长距离输水管道材料选择的主要因素,介绍了钢管、球墨铸铁管、混凝土管等传统输水管道的材料特性,阐述了纤维复合材料在输水管道中的应用,重点分析了玻璃钢夹砂管的发展和特点,最后对纤维复合材料输水管道在产品升级、施工技术、安全防护和质量管理四个方面的发展进行了展望。

声波法测试玻璃纤维杨氏模量

声波法是一种无损检测玻璃材料模量的方法,但对被测样品的形状、尺寸等有所限制。在测试玻璃纤维模量时,声波法会因发射信号的传递效率、接收灵敏度以及样品的差异性等因素影响测试结果。通过调整声波振动的频率和纱线的纤维数量,研究声波法测试玻璃纤维模量的可行性。结果表明,波频增高后(5 kHz),经过玻璃纤维的信号强度减弱;200 Hz的振动波具有良好的精度(变异系数≤3.73%),以及拟合优度(R^(2)=0.9999)。此外,通过与拉伸法对比,发现测试结果均保持一致性:随着纱线纤维数量的增加,弹性模量下降,且单丝的弹性模量高于复丝的弹性模量。该研究可为纤维材料模量的无损检测提供参考。

剑麻-耐碱玻璃纤维对混凝土的性能影响

剑麻纤维作为一种绿色环保植物纤维,具有成本低廉、韧性和弹性模量高、抗拉抗腐蚀性好等诸多优点,混凝土中掺入剑麻纤维在一定程度上能够提高其劈裂抗拉强度和弹性模量,从而提高混凝土结构的耐久性,延长混凝土的使用寿命。耐碱玻璃纤维具有抗拉强度高、流动性好、与混凝土浆料的包裹黏结性好等特点。该纤维的掺入对于混凝土的抗折和抗拉强度有着明显提高,并且已经成功应用在了隧道工程当中,取得了较为成功的结果。这两种纤维所组成的双掺混合纤维不仅能够保留两者优点,而且能够加强其力学性能。文章主要探讨了两者混合所构成的混合纤维混凝土的特点及其对混凝土力学性能改善的效果。

玻纤化工原料纯碱制备工艺及其质量检测

为进一步降低玻璃纤维的制造成本,提出了降低其化工原料纯碱的制备成本来实现的思路。在研究以工业废盐为原料制备纯碱的工艺流程上,为得到其最佳工艺条件,制备了相应的实验方案和质量检测方案,重点对反应时间、温度以及原料质量比等参数进行优化,相关研究成果可指导生产实践。

酸对玻纤滤纸性能影响的研究

对于玻纤滤纸,加酸分散纤维是其生产过程中的通用工艺。以往研究侧重于分析酸对于纤维分散效果的影响,重点研究了酸的加入对玻纤滤纸力学性能和过滤性能产生的影响。实验结果表明:酸会与玻璃纤维反应导致纤维表面生成了更多的Si-OH;当玻纤滤纸抄造过程中加酸控制浆料pH为2.5时,使用39°SR和49°SR玻璃棉所抄造滤纸的抗张强度比不加酸时分别高了54%和58%,透气度分别下降了11%和14%,平均孔径分别下降了12%和14%。过滤性能测试结果表明,加酸制备滤纸的液体过滤比要明显高于未加酸制备的滤纸。

玻璃钢锚杆生产工艺介绍与生产线技术改造

文章介绍了玻璃钢锚杆的发展历程,分析了国内外玻璃钢锚杆的生产工艺,介绍了国内玻璃钢锚杆生产线设备发展情况,针对国内某企业玻璃钢锚杆生产线进行了技术改造和关键部件的机械结构设计,提高了产品生产的自动化水平。实践表明,改造后生产效率和生产质量均得到了提升。

船艇用玻璃钢材料的生命周期碳排放分析

玻璃钢(GFRP)因其质轻高强耐腐蚀的特点而广泛应用于船艇壳体材料。在我国船艇行业落实“双碳”发展战略的背景下,“绿色低碳船艇”理念对船艇用玻璃钢材料的碳排放等环境负荷指标提出了新的要求。本文采用面向过程的生命周期分析方法(LCA),构建了船艇用玻璃钢材料从原料生产到废弃过程的分析模型。结果表明:1 t船艇用玻璃钢材料的碳排放为5023.60 kg CO_(2)eq,原辅料生产、生产加工和废弃处置阶段占比分别为70.33%、14.55%和15.12%;原辅料生产阶段碳排放主要来源于树脂产品和玻纤产品,生产加工阶段的碳排放主要来源于电力消费,废弃处置阶段开展废旧玻璃钢材料的综合利用将有助于碳减排。根据上述结果,对船艇用玻璃钢材料生命周期各个阶段的减碳路径提供了建议及成效分析。

纤维增强封层技术在公路沥青路面养护中的应用研究

为解决沥青路面裂缝等病害,提升路面抗裂、抗渗性能,延长使用年限,文中以G75兰海高速武罐段为例,提出纤维增强封层设计方案,并分析了封层工艺流程及施工要点,从渗水系数、构造深度、平整度方面评价纤维增强封层养护质量。结果表明:路面铺筑纤维增强封层的渗水系数、构造深度等指标均满足规范要求,可供相关人员借鉴参考。

玻璃纤维板阵列增多层吸波复合结构

本文将电路模拟吸波阵列与玻璃纤维介质板(FEPL)阵列结合,采用真空热压成型工艺制备了一种具有超宽带强吸波性能的多层复合结构。整个FEPL阵列复合结构的表面密度约为2.4 kg/m^(2),厚度约为10.0 mm。仿真和测量结果均表明,FEPL阵列可以明显改善吸波结构的斜入射角的稳定性,提高电磁吸收率,拓宽吸收带宽。在斜入射角40°~60°范围内,FEPL阵列显著提高了吸波复合结构的吸收性能,同时将相对带宽(FBW)拓宽了约9.1%;此外,它还将复合吸波结构正入射角的平均反射系数从−14.4 dB降低到了−25.7 dB,降低了约11.3 dB。本文所提出的玻璃纤维板阵列增多层吸波复合结构性能优异,制备工艺简单,适合实际工程应用。

基于非线性热响应的玻璃纤维/乙烯基酯复合材料拉伸响应预报方法

为探究复合材料结构在火灾条件下的力学响应,建立考虑基体热解和纤维软化效应的复合材料热-拉伸响应模型,通过多维数组运算对非线性方程组进行求解,研究高温下玻璃纤维/乙烯基酯复合材料的拉伸性能变化规律、预测玻璃纤维/乙烯基酯复合材料在不同拉伸载荷和单侧热流工况下的失效时间。结果表明:建立的非线性热-拉伸性响应模型,能够有效预测乙烯基酯及玻璃纤维/乙烯基酯复合材料在单侧恒定热流下的拉伸性能。通过模型预测曲线可知,玻璃纤维/乙烯基酯复合材料拉伸强度随温度的下降主要分为两个阶段:第一阶段为其在玻璃化转变温度附近快速下降;第二阶段为材料基体完全玻璃化转变后,玻璃纤维/乙烯基酯复合材料拉伸强度的缓慢下降。另外,随着拉伸载荷的增加,玻璃纤维/乙烯基酯复合材料失效时间迅速缩短,且失效时间随拉伸载荷变化情况在不同热流密度下具有相同的趋势。在相同拉伸应力下,热流密度的下降可延长材料的失效时间。在80%室温强度的拉伸应力下,层合板在10 kW/m^(2)下的失效时间较75 kW/m^(2)延长了300 s。在10 kW/m^(2)条件下,施加拉伸应力低于50%室温强度时,层合板在长时间内不会发生失效。