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Ti-V微合金钢 1

原位透射电镜 1

液相透射电镜 1

相间析出 1

等温相变 1

纳米气泡 1

表面活性剂 1

透射电子显微镜 1

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利用液相透射电子显微镜技术研究纳米气泡在表面活性剂水溶液中的动力机制 Letter

Yuna Bae, Sungsu Kang, Byung Hyo Kim, Kitaek Lim, Sungho Jeon, Sangdeok Shim, Won Chul Lee, Jungwon Park

《工程（英文）》 2021年第7卷第5期页码 630-635 doi: 10.1016/j.eng.2021.02.006

摘要：利用多室石墨烯液体池液相透射电子显微镜（TEM），在相同的成像条件下观察了体相纳米气泡和表面纳米气泡。

关键词：纳米气泡原位透射电镜液相透射电镜表面活性剂

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Dispersion of “guava-like” silica/polyacrylate nanocomposite particles in polyacrylate matrix

QI Dongming, YANG Lei, WU Minghua, SHAO Jianzhong, BAO Yongzhong

《化学科学与工程前沿（英文）》 2008年第2卷第2期页码 127-134 doi: 10.1007/s11705-008-0033-0

摘要： A series of “guava-like” silica/polyacrylate nanocomposite particles with close silica content and different grafting degrees were prepared via mini-emulsion polymerization using 3-(trimethoxysilyl)propyl methacrylate (TSPM) modified silica/acrylate dispersion. The silica/polyacrylate composite particles were melt-mixed with unfilled polyacrylate (PA) resin to prepare corresponding silica/polyacrylate molded composites and the dispersion mechanism of these silica particles from the “guava-like” composite particles into polyacrylate matrix was studied. It was calculated that about 110 silica particles were accumulated in the bulk of every silica/polyacrylate composite latex particle. Both the solubility tests of silica/polyacrylate composite latex particles in tetrahydrofuran (THF) and the section transmission electron microscope (TEM) micrographs of silica/polyacrylate molded composites indicated that the grafting degree of silica particles played a crucial role in the dispersion of silica/polyacrylate composite particles into the polyacrylate matrix. When the grafting degree of polyacrylate onto silica was in a moderate range (ca. 20%–70%), almost all of silica particles in these “guava-like” composite particles were dispersed into the polyacrylate matrix in a primary-particle-level. However, at a lower grafting degree, massive silica aggregations were found in molded composites because of the lack of steric protection. At a greater grafting degree (i.e., 200%), a cross-linked network was formed in the silica/polyacrylate composite particles, which prevented the dispersion of composite particles in THF and polyacrylate matrix as primary particles.

关键词： silica/polyacrylate composite cross-linked network –70 guava-like TEM

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低碳钛、钒微合金钢中的相间析出

贾涛,魏娇,冯洁,张维娜,刘振宇,王国栋

《中国工程科学》 2014年第16卷第1期页码 88-92

摘要：

针对目前较少关注的Ti-V微合金体系，在Formaster—FII 膨胀仪上进行奥氏体/铁素体两相区等温，在铁素体相变同时获得Ti、V复合相间析出。采用金相、透射电子显微镜对显微组织、尤其是相间析出形貌、及其与铁素体基体的位向关系进行了观察与分析。研究表明，650 ℃为静态等温相变的鼻温点，相间析出呈层状分布，具有平面和曲面两种形貌，相间析出碳化物与铁素体基体之间存在Baker-Nutting 取向关系。

关键词： Ti-V微合金钢相间析出等温相变透射电子显微镜

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A multi-integrated approach on toxicity effects of engineered TiO

Ana PICADO,Susana M. PAIXÃO,Liliana MOITA,Luis SILVA,Mário S. DINIZ,Joana LOURENÇO,Isabel PERES,Luisa CASTRO,José Brito CORREIA,Joana PEREIRA,Isabel FERREIRA,António Pedro Alves MATOS,Pedro BARQUINHA,Elsa MENDONCA

《环境科学与工程前沿（英文）》 2015年第9卷第5期页码 793-803 doi: 10.1007/s11783-015-0775-0

摘要： The new properties of engineered nanoparticles drive the need for new knowledge on the safety, fate, behavior and biologic effects of these particles on organisms and ecosystems. Titanium dioxide nanoparticles have been used extensively for a wide range of applications, e.g, self-cleaning surface coatings, solar cells, water treatment agents, topical sunscreens. Within this scenario increased environmental exposure can be expected but data on the ecotoxicological evaluation of nanoparticles are still scarce. The main purpose of this work was the evaluation of effects of TiO nanoparticles in several organisms, covering different trophic levels, using a battery of aquatic assays. Using fish as a vertebrate model organism tissue histological and ultrastructural observations and the stress enzyme activity were also studied. TiO nanoparticles (Aeroxide® P25), two phase composition of anatase (65%) and rutile (35%) with an average particle size value of 27.6±11 nm were used. Results on the EC for the tested aquatic organisms showed toxicity for the bacteria, the algae and the crustacean, being the algae the most sensitive tested organism. The aquatic plant showed no effect on growth. The fish showed no effect on a 21 day survival test, though at a biochemical level the cytosolic Glutathione-S-Transferase total activity, in intestines, showed a general significant decrease ( <0.05) after 14 days of exposure for all tested concentrations. The presence of TiO nanoparticles aggregates were observed in the intestine lumen but their internalization by intestine cells could not be confirmed.

关键词： ecotoxicity enzymatic analysis histology transmission electron microscopy (TEM) TiO₂-nanoparticles