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Research on properties of hollow glass microspheres/epoxy resin composites applied in deep rock in-situ temperature-preserved coring 被引量:3
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作者 Zhi-Qiang He Yang Yang +7 位作者 Bo Yu Jian-Ping Yang Xiang-Biao Jiang Bo Tian Man Wang Xi-Yuan Li Si-Qing Sun Hui Sun 《Petroleum Science》 SCIE CAS CSCD 2022年第2期720-730,共11页
Deep petroleum resources are in a high-temperature environment.However,the traditional deep rock coring method has no temperature preserved measures and ignores the effect of temperature on rock porosity and permeabil... Deep petroleum resources are in a high-temperature environment.However,the traditional deep rock coring method has no temperature preserved measures and ignores the effect of temperature on rock porosity and permeability,which will lead to the distortion of the petroleum resources reserves assessment.Therefore,the hollow glass microspheres/epoxy resin(HGM/EP)composites were innovatively proposed as temperature preserved materials for in-situ temperature-preserved coring(ITP-Coring),and the physical,mechanical,and temperature preserved properties were evaluated.The results indicated that:As the HGM content increased,the density and mechanical properties of the composites gradually decreased,while the water absorption was deficient without hydrostatic pressure.For composites with 50 vol%HGM,when the hydrostatic pressure reached 60 MPa,the water absorption was above 30.19%,and the physical and mechanical properties of composites were weakened.When the hydrostatic pressure was lower than 40 MPa,the mechanical properties and thermal conductivity of composites were almost unchanged.Therefore,the composites with 50 vol%HGM can be used for ITPCoring operations in deep environments with the highest hydrostatic pressure of 40 MPa.Finally,to further understand the temperature preserved performance of composites in practical applications,the temperature preserved properties were measured.An unsteady-state heat transfer model was established based on the test results,then the theoretical change of the core temperature during the coring process was obtained.The above tests results can provide a research basis for deep rock in-situ temperature preserved corer and support accurate assessment of deep petroleum reserves. 展开更多
关键词 Deep rock in-situ temperature-preserved coring(ITP-Coring) hollow glass microspheres/epoxy resin composites Hydrostatic pressure Unsteady-state heat transfer model
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Surface Modification of Hollow Glass Microspheres 被引量:3
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作者 Fredrick N. Mutua Peijie Lin +1 位作者 Jacob K. Koech Yimin Wang 《Materials Sciences and Applications》 2012年第12期856-860,共5页
Hollow Glass Microspheres are high-strength, low-density additives made from water resistant and chemically-stable soda-lime-borosilicate glass. These hollow glass microspheres offer a variety of advantages over conve... Hollow Glass Microspheres are high-strength, low-density additives made from water resistant and chemically-stable soda-lime-borosilicate glass. These hollow glass microspheres offer a variety of advantages over conventional irregularly-shaped mineral fillers or glass fiber. Their spherical shape helps reduce resin content in a variety of applications. They also create a ball bearing effect that can result in higher filler loading and improved flow. In this research, amine terminated hollow glass microspheres were prepared by adopting three different routes. The results were investigated using FT-IR and SEM to establish the formation of amine groups and observe the morphological structure of the modified HGMs. The results obtained were used to select a suitable less toxic and environmental friendly modification method based on the chemicals used. 展开更多
关键词 hollow glass microsphereS 3-AMINOPROPYLTRIETHOXYSILANE Hydroxylate
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Effect of Ultrasonication on the Properties of Multi-walled Carbon Nanotubes/Hollow Glass Microspheres/Epoxy Syntactic Foam 被引量:1
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作者 亚斌 ZHOU Bingwen +4 位作者 YIN Shijian HUANG Bingkun PEI Leizhen JIA Fei 张兴国 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第3期709-712,共4页
Multi-walled carbon nanotubes(MWCNTs) reinforced hollow glass microspheres(HGMs)/epoxy syntactic foam was fabricated. The effects of ultrasonication on the density, compression strength, and water absorption prope... Multi-walled carbon nanotubes(MWCNTs) reinforced hollow glass microspheres(HGMs)/epoxy syntactic foam was fabricated. The effects of ultrasonication on the density, compression strength, and water absorption properties were studied. Better dispersed MWCNTs can be obtained after ultrasonication treatment, but an increasing viscosity will lead to a larger amount of voids during syntactic foam preparation especially when the content of HGMs is more than 70 vol%. The existing voids will decrease the density of epoxy syntactic foam. However, the ultrasonication does not change the compression strength much. Ultrasonication treatment will decrease the water absorption content due to the better dispersion and hydrophobic properties of MWCNTs. But a significant increase of water absorption content occurs when HGMs is more than 70 vol%, which is attributed to the higher viscosity and larger amount of voids. 展开更多
关键词 carbon nanotubes hollow glass microspheres syntactic foam ultrasonication
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The Effective Surface Metallization of Hollow Glass Microspheres for Flexible Electromagnetic Shielding Film
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作者 BU Fan SONG Pengcheng +5 位作者 LIU Yahui WANG Jun WU Xiyuan LIU Lei XU Chuanhua ZHAGN Jianfeng 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2022年第5期779-786,共8页
The surface of hollow glass microspheres (HGMs) was roughened by a HCl+NH_(4)F strategy,which achieved a broken ratio as 16.10%,and then metallized by electroless plating by Co nanoparticles up to 90 wt% (abbreviated ... The surface of hollow glass microspheres (HGMs) was roughened by a HCl+NH_(4)F strategy,which achieved a broken ratio as 16.10%,and then metallized by electroless plating by Co nanoparticles up to 90 wt% (abbreviated as Co-HGMs).The average grain size of Co was measured to range from 0.4 to 0.5 μm.Then Co-HGMs were mixed with liquid silicone rubber and xylene,and cured on a perspex plate applicable for flexible electromagnetic shielding.By attentive parameter optimization,a film about 0.836 mm in thickness was obtained with a density of 0.729 g/cm^(3),showing a shielding effectiveness of 15.2 dB in the X-band (8.2-12.4 GHz) at room temperature,which was ascribed to the formation of a conductive network of Co-HGMs inside the film.Simultaneously,the tensile strength of 0.89 MPa at an elongation ratio of 194.5% was also obtained,showing good mechanical properties and tensile strength. 展开更多
关键词 hollow glass microspheres(hgms) electroless plating electromagnetic shielding film flexible film lightweight materials
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Preparation and Properties of TiO2-Coated Hollow Glass Microspheres as Thermal Insulation Materials for Energy-Saving Buildings
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作者 Chunyu Wu Weilin Wang Huiming Ji 《Transactions of Tianjin University》 EI CAS 2020年第4期283-291,共9页
A hollow glass microsphere(HGM)/TiO2 composite hollow sphere was successfully prepared via a simple precipitation method.The TiO2 coating layers grew on the surface of the HGMs that range from 20 to 50μm in diameter ... A hollow glass microsphere(HGM)/TiO2 composite hollow sphere was successfully prepared via a simple precipitation method.The TiO2 coating layers grew on the surface of the HGMs that range from 20 to 50μm in diameter as nanoparticles with the formation of the SiO Ti bonds.The growth mechanism accounting for the formation of the TiO2 nanolayers was proposed.The morphology,composition,thermal insulation properties,and visible-near infrared(VIS-NIR)refl ectance of the HGMs/TiO2 composite hollow spheres were characterized.The VIS-NIR reflectance of the HGMs/TiO2 composite hollow spheres increased by more than 30%compared to raw HGMs.The thermal conductivity of the particles is 0.058 W/(m K).The result indicates that the VIS-NIR reflectance of the composite hollow spheres is strongly influenced by the coating of TiO2.The composite hollow spheres were used as the main functional filler to prepare the organic-inorganic composite coatings.The glass substrates coated by the organic-inorganic coatings had lower thermal conductivity and higher near infrared reflectivity.Therefore,the HGMs/TiO2 composite hollow spheres can reflect most of the solar energy and effectively keep out the heat as a thermal insulation coating for energy-saving constructions. 展开更多
关键词 TIO2 hollow glass microspheres Thermal insulation materials Near infrared reflectance
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HGM@GO聚氨酯复合材料的制备和导热性能研究
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作者 曹翔宇 翟锐 +4 位作者 穆春怀 张秀玲 祁极冰 李清芬 闫娟枝 《化工新型材料》 CAS CSCD 北大核心 2024年第11期105-109,共5页
首先通过氧化石墨烯(GO)包覆对空心玻璃微珠(HGM)进行表面改性,再经过物理混合制备改性空心玻璃微珠/聚氨酯复合材料,使用X射线衍射仪、扫描电子显微镜、热重分析仪对经过氧化石墨烯包覆改性的空心玻璃微珠进行形貌和结构分析,对改性空... 首先通过氧化石墨烯(GO)包覆对空心玻璃微珠(HGM)进行表面改性,再经过物理混合制备改性空心玻璃微珠/聚氨酯复合材料,使用X射线衍射仪、扫描电子显微镜、热重分析仪对经过氧化石墨烯包覆改性的空心玻璃微珠进行形貌和结构分析,对改性空心玻璃微珠/聚氨酯复合材料进行力学性能、导热性能、热膨胀性能等测试。结果表明:使用氧化石墨烯包覆空心玻璃微球对复合材料的硬度、拉伸强度、压缩强度和弯曲强度均有一定提升。在空心玻璃微球添加量高于5%后,复合材料的导热性能开始优于纯聚氨酯材料,表明空心玻璃微珠表面的石墨烯层使材料内部形成了高导热通道,整体提高了复合材料的导热系数,使复合材料密度降低的同时具备更加优良的导热性能。对复合材料的热稳定性进行测试分析发现,在添加了空心玻璃微珠填料之后,复合材料的热膨胀系数随温度增加的趋势得到了很好的抑制,在180℃下仍能保持较好的尺寸稳定性。 展开更多
关键词 空心玻璃微珠 聚氨酯 氧化石墨烯 导热性能
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HGM质量分数和环境温度对水泥基隔热注浆材料性能的影响 被引量:1
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作者 范利丹 孙亮 +2 位作者 余永强 张纪云 郭佳奇 《河南理工大学学报(自然科学版)》 CAS 北大核心 2023年第3期158-164,共7页
为了满足高地温隧道建设中隔热注浆材料需要,采用偏高岭土取代部分水泥配制浆液,并加入空心玻璃微珠(hollow glass microspheres,HGM)提高隔热性能。在模拟的地热环境中,探讨碱激发剂质量分数对水泥-偏高岭土注浆材料抗压强度的影响以及... 为了满足高地温隧道建设中隔热注浆材料需要,采用偏高岭土取代部分水泥配制浆液,并加入空心玻璃微珠(hollow glass microspheres,HGM)提高隔热性能。在模拟的地热环境中,探讨碱激发剂质量分数对水泥-偏高岭土注浆材料抗压强度的影响以及HGM质量分数和环境温度对注浆材料性能的影响。结果表明:激发剂在最佳质量分数1%时可提高抗压强度15.89%,随着HGM质量分数增加,凝结时间会延长,注浆材料抗压强度、抗渗性和导热系数降低;养护温度升高会缩短凝结时间、降低注浆材料导热系数,并使结石体28 d抗压强度和抗渗性先升高后降低;当养护温度超过50℃时,结石体后期抗压强度出现倒缩。SEM和孔隙率分析表明,40℃养护形成的结石体孔隙率最低,HGM被水化产物包裹较好,但界面结合力尚需增强。 展开更多
关键词 隔热注浆材料 空心玻璃微珠 高地温 隔热性能
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成型方法对高HGMS体积分数固体浮力材料性能的影响 被引量:1
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作者 黄纬 衣亚东 +1 位作者 吴平伟 戴金辉 《复合材料科学与工程》 CAS 北大核心 2022年第12期75-78,123,共5页
以环氧树脂E-4221为基体,空心玻璃微珠(hollow glass microsphere, HGMS)做填充材料,分别采用模压、挤出和真空捣打成型方法制备了高HGMS体积分数的复合材料。研究了成型方法对复合材料密度、抗压强度和不同静水压力下吸水率的影响,确... 以环氧树脂E-4221为基体,空心玻璃微珠(hollow glass microsphere, HGMS)做填充材料,分别采用模压、挤出和真空捣打成型方法制备了高HGMS体积分数的复合材料。研究了成型方法对复合材料密度、抗压强度和不同静水压力下吸水率的影响,确定了不同成型方法的适用范围。结果表明:挤出成型和真空捣打成型方法适用于制备高HGMS体积分数的固体浮力材料;挤出成型方法可以获得密度不小于0.62 g/cm^(3)且安全使用深度不小于8 000 m的固体浮力材料;真空捣打成型方法可以获得密度低于0.57 g/cm^(3)且安全使用深度达4 000 m的固体浮力材料。 展开更多
关键词 固体浮力材料 环氧树脂 空心玻璃微珠 挤出成型
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流场特性对熔融混合条件下PVDF/HGMs性能影响
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作者 成迪 殷小春 林城 《塑料》 CAS CSCD 北大核心 2022年第1期131-135,155,共6页
利用剪切形变支配的Brabender转子密炼机(BM)和自行研制的拉伸形变支配的叶片混炼机(VM),采用熔融共混法制备PVDF/HGMs共混物,通过对比分析了流场特性对共混物微观结构、力学性能和介电性能的影响。密度测试与SEM结果表明,当HGMs含量为... 利用剪切形变支配的Brabender转子密炼机(BM)和自行研制的拉伸形变支配的叶片混炼机(VM),采用熔融共混法制备PVDF/HGMs共混物,通过对比分析了流场特性对共混物微观结构、力学性能和介电性能的影响。密度测试与SEM结果表明,当HGMs含量为15%时,采用BM和VM制备的共混物密度分别降低了10%和13%,拉伸流场起主导作用的VM对HGMs结构的损害较小,未进行任何处理的HGMs在基体中分散均匀,并且与基体形成了稳固的结合界面;当HGMs含量为9%时,VM制备的共混物的拉伸强度为43.2 MPa,与BM制备的共混物相比,提高了39.8%;VM制备的共混物的介电损耗为0.063,与BM制备的共混物相比,降低了25%。因此,VM在熔融共混制备的过程中,在实现了HGMs良好分散的同时,保存了HGMs的完整性。 展开更多
关键词 剪切流动 拉伸流动 中空玻璃微珠 熔融共混 介电性能
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螺杆构型对PP/HGMs复合材料性能影响 被引量:1
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作者 陈锐 吴喜元 刘亚辉 《工程塑料应用》 CAS CSCD 北大核心 2021年第7期71-75,共5页
采用双螺杆挤出机制备聚丙烯/空心玻璃微珠(PP/HGMs)复合材料,设计了A1~A4四种组合的混合段螺杆构型,研究了螺杆构型对PP/HGMs复合材料中HGMs的完整率、复合材料密度及力学性能的影响。结果表明,A1,A2组合制备的复合材料中HGMs破碎严重,... 采用双螺杆挤出机制备聚丙烯/空心玻璃微珠(PP/HGMs)复合材料,设计了A1~A4四种组合的混合段螺杆构型,研究了螺杆构型对PP/HGMs复合材料中HGMs的完整率、复合材料密度及力学性能的影响。结果表明,A1,A2组合制备的复合材料中HGMs破碎严重,HGMs的完整率分别仅为57.3%和64.6%,而A3,A4组合制备的复合材料中HGMs结构完整,HGMs的完整率分别为91.1%和93.5%。扫描电子显微镜照片显示,A1,A2组合制备的复合材料断面处HGMs破碎严重,A3,A4组合制备的复合材料断面处HGMs结构完整,HGMs形貌观察与完整率计算数据吻合,同时,复合材料中HGMs的完整率越高,复合材料的实际密度与理论密度越接近,弯曲弹性模量提高幅度越大,悬臂梁缺口冲击强度衰减越显著。 展开更多
关键词 螺杆构型 聚丙烯 空心玻璃微珠 复合材料 分布混合 完整率
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中空玻璃微球基吸附剂处理工业废水研究进展
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作者 李会东 郭静 +3 位作者 刘佩祖 崔凯 丰东昇 伊俊铭 《水处理技术》 CAS CSCD 北大核心 2024年第6期21-26,45,共7页
工业废水产量大、有害物质种类繁杂、毒性大,其过量进入食物链会导致严重的健康损害。吸附技术被认为一种绿色、可持续的水处理技术在工业废水处理领域具有独特的优势。中空玻璃微球(HGM)质量轻,具有良好的漂浮性能,可作为优质的吸附剂... 工业废水产量大、有害物质种类繁杂、毒性大,其过量进入食物链会导致严重的健康损害。吸附技术被认为一种绿色、可持续的水处理技术在工业废水处理领域具有独特的优势。中空玻璃微球(HGM)质量轻,具有良好的漂浮性能,可作为优质的吸附剂载体。对其进行改性或与其它材料复合制备新型漂浮式吸附剂解决了自身吸附性能差的缺点。同时,重点介绍了HGM基吸附剂的制备方法和吸附性能,总结了HGM基吸附剂处理各类工业废水的难点与特性。在HGM改性材料的基础上,梳理了其在单一体系和复杂体系中的吸附特性以及吸附过程中的主要影响因素:反应温度、溶液pH、共存离子等。最后,对HGM基吸附剂的吸附机理进行了总结,并对中空玻璃微球基吸附剂的应用和发展趋势进行了展望。 展开更多
关键词 中空玻璃微球 吸附剂 吸附 工业废水处理
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Research on thermal insulation materials properties under HTHP conditions for deep oil and gas reservoir rock ITP-Coring 被引量:1
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作者 Zhi-Qiang He He-Ping Xie +4 位作者 Ling Chen Jian-Ping Yang Bo Yu Zi-Jie Wei Ming-Zhong Gao 《Petroleum Science》 SCIE EI CAS CSCD 2024年第4期2625-2637,共13页
Deep oil and gas reservoirs are under high-temperature conditions,but traditional coring methods do not consider temperature-preserved measures and ignore the influence of temperature on rock porosity and permeability... Deep oil and gas reservoirs are under high-temperature conditions,but traditional coring methods do not consider temperature-preserved measures and ignore the influence of temperature on rock porosity and permeability,resulting in distorted resource assessments.The development of in situ temperaturepreserved coring(ITP-Coring)technology for deep reservoir rock is urgent,and thermal insulation materials are key.Therefore,hollow glass microsphere/epoxy resin thermal insulation materials(HGM/EP materials)were proposed as thermal insulation materials.The materials properties under coupled hightemperature and high-pressure(HTHP)conditions were tested.The results indicated that high pressures led to HGM destruction and that the materials water absorption significantly increased;additionally,increasing temperature accelerated the process.High temperatures directly caused the thermal conductivity of the materials to increase;additionally,the thermal conduction and convection of water caused by high pressures led to an exponential increase in the thermal conductivity.High temperatures weakened the matrix,and high pressures destroyed the HGM,which resulted in a decrease in the tensile mechanical properties of the materials.The materials entered the high elastic state at 150℃,and the mechanical properties were weakened more obviously,while the pressure led to a significant effect when the water absorption was above 10%.Meanwhile,the tensile strength/strain were 13.62 MPa/1.3%and 6.09 MPa/0.86%at 100℃ and 100 MPa,respectively,which meet the application requirements of the self-designed coring device.Finally,K46-f40 and K46-f50 HGM/EP materials were proven to be suitable for ITP-Coring under coupled conditions below 100℃ and 100 MPa.To further improve the materials properties,the interface layer and EP matrix should be optimized.The results can provide references for the optimization and engineering application of materials and thus technical support for deep oil and gas resource development. 展开更多
关键词 Deep oil and gas reservoir rock In situ temperature-preserved coring(ITPCoring) hollow glass microsphere/epoxy resin thermal insulation materials(hgm/EP materials) High-temperature and high-pressure(HTHP) Physical and mechanical properties
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空心玻璃微珠在涂料中的应用与研究进展
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作者 王润庭 高梦岩 +7 位作者 李海燕 张建英 曹仁伟 宋慈 孙坤 邱家浩 秦颖 朱明绪 《功能材料》 CAS CSCD 北大核心 2024年第9期9071-9077,共7页
简述了空心玻璃微珠的表面改性方法以及在涂料中的应用情况,分类总结了其在隔热涂料、防火涂料、吸波涂料和防腐涂料中的最新研究进展,并对未来空心玻璃微珠在涂料中的应用方向拓展进行了展望。
关键词 空心玻璃微珠 涂层 表面改性 隔热 防火
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梯度空心玻璃微珠诱导的分形自泵水凝胶的制备及其快速吸水性能研究
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作者 兰晋泽 时连鑫 +3 位作者 肖五一 张晓斌 王雨哲 王树涛 《现代化工》 CAS CSCD 北大核心 2024年第1期89-93,100,共6页
通过在水凝胶体系内引入梯度排布的空心玻璃微珠(hollow glass microsphere,HGM),制备了一种具有超高导水效率的分形自泵(fractal self-pumping,FS)水凝胶。在所制备的分形自泵空心玻璃微珠水凝胶(FS-HGM hydrogel)中,水凝胶骨架通过硅... 通过在水凝胶体系内引入梯度排布的空心玻璃微珠(hollow glass microsphere,HGM),制备了一种具有超高导水效率的分形自泵(fractal self-pumping,FS)水凝胶。在所制备的分形自泵空心玻璃微珠水凝胶(FS-HGM hydrogel)中,水凝胶骨架通过硅烷偶联剂将相邻空心玻璃微珠紧密结合固定,在玻璃微球间形成了逐级变小的亲水分形毛细微通道。结果表明,独特的分形毛细微通道极大地提高了水凝胶的导水性能,在动态接触角实验中表现出超过传统水凝胶约240倍的吸水速率,并且吸水效率随着FS-HGM水凝胶层的增厚有所提升。所制备的快速吸水分形凝胶通过高效移除过量渗出液,加速烫伤伤口愈合,为临床应用中输运生物流体开辟了新途径。 展开更多
关键词 分形结构 空心玻璃微珠 超快速吸水 水凝胶敷料 自泵
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空心玻璃微珠改性对喷涂型环氧涂层性能影响 被引量:1
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作者 邓龙 贺辉 +2 位作者 张立国 关振威 王智勇 《表面技术》 EI CAS CSCD 北大核心 2024年第16期129-138,共10页
目的通过表面改性提升空心玻璃微珠(HGM)在喷涂型环氧涂层中的分散性并提升涂层性能。方法应用KH560作为桥联单元,链接NaOH刻蚀后HGM表面的羟基与CTPB的端羧基,制备HGM-CTPB。应用SEM、FTIR、TGA和UV对过程中各表面改性HGM的表面形貌、... 目的通过表面改性提升空心玻璃微珠(HGM)在喷涂型环氧涂层中的分散性并提升涂层性能。方法应用KH560作为桥联单元,链接NaOH刻蚀后HGM表面的羟基与CTPB的端羧基,制备HGM-CTPB。应用SEM、FTIR、TGA和UV对过程中各表面改性HGM的表面形貌、接枝基团及在环氧涂层中的分散性进行分析,并将HGM-CTPB作为低密度填料加入环氧涂层中,研究其添加量对涂层的附着力、柔韧性、耐冲击性、表面粗糙度以及耐腐蚀性能的影响。结果CTPB可通过KH560成功桥接在NaOH刻蚀过的HGM表面,所制备的HGM-CTPB相较于HGM本身、NaOH刻蚀HGM以及KH560接枝改性的HGM可在环氧涂层中实现更为均匀的分散,同时CTPB基团可与树脂分子反应将HGM牢固锚定。将HGM-CTPB作为填料,其添加量与环氧树脂质量比为0.08和0.16时,所制备的环氧涂层性能较优。面密度较纯环氧涂层分别降低5.6%和11.3%;涂层附着力分别提高0.97、2.14MPa,达到15.57、16.74MPa,依据国标方法,涂层可耐50cm·kg的正、反向冲击,柔韧性达到1 mm;在60℃,浓度为5%(质量分数)的热盐水中浸泡144 h后,低频阻抗可以保持在10^(8)Ω以上,较纯环氧涂层提升2个数量级。结论CTPB的成功接枝可以使HGM在环氧涂层中实现最优的分散性,并与树脂基体实现良好结合;适量添加HGM-CTPB,可显著降低环氧涂层面密度,提升附着力和耐腐蚀性。 展开更多
关键词 空心玻璃微珠 环氧涂层 填料改性 端羧基聚丁二烯 低密度 附着力 防腐蚀性能
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中空玻璃微球/TPU复合泡沫的制备及微孔结构的研究
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作者 梁议心 王心超 +3 位作者 刘佳佳 肖寒池 耿铁 Lih-Sheng Turng 《精密成形工程》 北大核心 2024年第6期24-33,共10页
目的探讨GB含量变化对中空玻璃微球/TPU复合材料相变行为、流变性能及热力学性能的影响,并研究微米尺寸填料GB对泡沫微孔形态、尺寸分布的影响。方法以中空玻璃微球和热塑性聚氨酯为原料,采用微孔注塑成型(MIM)发泡方式,制备GB/TPU复合... 目的探讨GB含量变化对中空玻璃微球/TPU复合材料相变行为、流变性能及热力学性能的影响,并研究微米尺寸填料GB对泡沫微孔形态、尺寸分布的影响。方法以中空玻璃微球和热塑性聚氨酯为原料,采用微孔注塑成型(MIM)发泡方式,制备GB/TPU复合泡沫材料。结果通过向TPU中引入微米玻璃球相改善发泡材料的微孔结构,在TPU中加入有机改性的GB,GB作为成核剂能显著提高TPU发泡材料的微孔结构。当GB质量分数为0.5%时,TPU熔体黏度得到提高,发泡性能得到改善,成功制备出具有复孔结构的GB/TPU复合泡沫。GB/TPU复合泡沫的密度被降低至0.51 g/cm^(3)。由于微米尺寸填料GB的平均直径为18μm,与TPU熔体形成较大的相界面,因此引起泡孔尺寸较大且泡孔开孔率较高的现象。结论差示扫描量热仪(DSC)测试结果表明,在冷却阶段及第二次加热熔融阶段,GB对TPU软段相和硬段相的相变行为没有明显的影响。但是在DSC第一次加热熔融阶段,GB引起了TPU熔融峰向低温区移动。旋转流变仪测试分析结果表明,在高剪切频率下,GB/TPU复合材料的复合黏度和储能模量明显高于TPU纯料的,且TPUGB0.5(含质量分数为0.5%的GB)的复合黏度和储能模量最大。TGA结果显示,热稳定性提高,利用扫描电子显微镜(SEM)观察复合材料泡沫材料泡孔结构可知,泡孔分布和尺寸均匀性显著提高。 展开更多
关键词 中空玻璃微球(GB) 热塑性聚氨酯(TPU) 泡孔 复合材料 微孔结构
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Controlled TiO2 coating on hollow glass microspheres and their reflective thermal insulation properties 被引量:14
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作者 Jie Long Chongwen Jiang +2 位作者 Jundong Zhu Quzhi Song Jiang Hu 《Particuology》 SCIE EI CAS CSCD 2020年第2期33-39,共7页
Hollow glass microspheres(HGMs)have great potential in building energy-saving and industrial insulation.Anatase TiO2-modified HGMs were prepared by a sol-gel method in acetic acid-ethanol solution.Scanning electron mi... Hollow glass microspheres(HGMs)have great potential in building energy-saving and industrial insulation.Anatase TiO2-modified HGMs were prepared by a sol-gel method in acetic acid-ethanol solution.Scanning electron microscopy,X-ray diffraction,zeta-potential measurements,nitrogen-sorption measurements,and Fourier-transform infrared and ultraviolet-visible-near-infrared diffuse reflectance spectroscopies showed that the alkali modification of the HGMs greatly influenced the loading and microstructure of the TiO2 film.The TiO2 loading could be accurately controlled by ethanol addition and the TiO2 coating time.A mechanism for the TiO2 coating of the HGM surface is proposed.The synergistic action of hydrogen bonding and electrostatic forces resulted in close contact between the HGMs and TiO2 sol at pH 3.5.The effects of different TiO2 loading rates on the reflective and thermal insulation properties were studied.The near-infrared reflectance of 15.9%TiO2 coated on HGMs was 96.27%,and the inner surface temperature of the composite pigment coated on aluminum board was reduced by 22.4℃.The TiO2/HGM composite pigments exhibited excellent solar reflective and thermal insulation properties,so have potential in the construction of exterior walls and roofs. 展开更多
关键词 hollow glass microspheres TiO2 loading SOL-GEL Reflective insulation Surface treatment
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Hollow glass microsphere production for laser direct-driven fusion targets on Shen Guang Ⅱ 被引量:4
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作者 邱龙会 魏芸 +4 位作者 姚书久 傅依备 郑永铭 唐永建 师韬 《Science China Mathematics》 SCIE 2002年第3期371-377,共7页
A liquid-droplet technique was investigated to fabricate thin wall hollow glass microspheres (HGM) used in laser fusion experiments on Shen Guang II. Glass-forming compositions, operating conditions of the droplet gen... A liquid-droplet technique was investigated to fabricate thin wall hollow glass microspheres (HGM) used in laser fusion experiments on Shen Guang II. Glass-forming compositions, operating conditions of the droplet generator and the vertical multiple-zone furnace were optimized. Thin wall HGM with diameters of about 100, 200, and 520 pm were fabricated, whose failure pressures, gas retention properties for D2, and chemical durability were all characterized. The results of the fusion experiments show that the HGM targets are quite satisfactory and the highest neutron yields obtained are 4 × 109. 展开更多
关键词 liquid-droplet technique hollow glass microspheres LASER FUSION target.
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A novel cryogenic insulation system of hollow glass microspheres and self-evaporation vapor-cooled shield for liquid hydrogen storage 被引量:6
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作者 Jianpeng ZHENG Liubiao CHEN +3 位作者 Ping WANG Jingjie ZHANG Junjie WANG Yuan ZHOU 《Frontiers in Energy》 SCIE CSCD 2020年第3期570-577,共8页
Liquid hydrogen(LH2)attracts widespread attention because of its highest energy storage density.However,evaporation loss is a serious problem in LH2 storage due to the low boiling point(20 K).Efficient insulation tech... Liquid hydrogen(LH2)attracts widespread attention because of its highest energy storage density.However,evaporation loss is a serious problem in LH2 storage due to the low boiling point(20 K).Efficient insulation technology is an important issue in the study of LH2 storage.Hollow glass microspheres(HGMs)is a potential promising thermal insulation material because of its low apparent thermal conductivity,fast installation(Compared with multi-layer insulation,it can be injected in a short time.),and easy maintenance.A novel cryogenic insulation system consisting of HGMs and a selfevaporating vapor-cooled shield(VCS)is proposed for storage of LH2.A thermodynamic model has been established to analyze the coupled heat transfer characteristics of HGMs and VCS in the composite insulation system.The results show that the combination of HGMs and VCS can effectively reduce heat flux into the LH2 tank.With the increase of VCS number from 1 to 3,the minimum heat flux through HGMs decreases by 57.36%,65.29%,and 68.21%,respectively.Another significant advantage of HGMs is that their thermal insulation properties are not sensitive to ambient vacuum change.When ambient vacuum rises from 10^-3 Pa to 1 Pa,the heat flux into the LH2 tank increases by approximately 20%.When the vacuum rises from 10^-3 Pa to 100 Pa,the combination of VCS and HGMs reduces the heat flux into the tank by 58.08%-69.84% compared with pure HGMs. 展开更多
关键词 liquid hydrogen storage hollow glass microspheres(hgms) self-evaporation vapor-cooled shield(VCS) thermodynamic optimization
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游离硼含量对空心玻璃微球耐压性能的影响
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作者 祁极冰 翟锐 +2 位作者 张翊 张秀玲 曹翔宇 《山西化工》 CAS 2024年第5期5-7,51,共4页
本实验通过将产品耐压性能不同的两组相同工艺制备的空心玻璃微球产品进行理化分析,分别对析出液进行电导率测试,对产品及析出液进行电感耦合等离子体发射光谱法(ICP-OES)和X射线光电子能谱(XPS)测试。测试结果表明,成分、粒径、密度方... 本实验通过将产品耐压性能不同的两组相同工艺制备的空心玻璃微球产品进行理化分析,分别对析出液进行电导率测试,对产品及析出液进行电感耦合等离子体发射光谱法(ICP-OES)和X射线光电子能谱(XPS)测试。测试结果表明,成分、粒径、密度方面相同的两种样品,ICP测试反映出HGM2析出液中游离硼元素比HGM1高8.6%,XPS测试反映出HGM2样品B/Si峰面积比HGM1少13%。表明在两组空心玻璃微球样品的结构中,硼元素参与玻璃化成键越充分,产品的耐压强度越高。而在水溶液中析出的含量可以作为反映产品强度性能的检测点和评价指标。本实验为空心玻璃微珠的制备工艺改进和应用工艺开发提供了理论依据。 展开更多
关键词 空心玻璃微球 硼元素 耐压性能 新型无机非金属材料
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