首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 51 毫秒
1.
陈明清  张明  蒋惠亮  方云 《日用化学工业》2003,33(4):264-267,274
简要介绍了纳米技术在高分子材料改性、色谱柱填料、催化剂载体和日用化工等领域中的应用;主要介绍了高分子纳米颗粒材料和纳米技术在生物医学等高新科技领域中的应用。纳米颗粒材料的制备技术是纳米技术的重要组成部分,研究和开发新型纳米材料以及新的应用领域已成为纳米科学研究中的一个主要发展方向。  相似文献   

2.
黄碧君  张力 《广东化工》2005,32(10):5-8
本文介绍了纳米材料及其技术在涂料中的应用情况,简要介绍了具有抗老化、抗菌、防污、导电、隐身等功能的纳米复合涂料.另外还介绍了纳米材料的改性方法及纳米复合涂料的一般制备方法.  相似文献   

3.
纳米材料改性水性聚氨酯的研究进展   总被引:1,自引:1,他引:0  
综述了纳米材料改性水性聚氨酯(PU)研制的进展情况,介绍了纳米材料在水性PU乳液中的分散方法和水性PU纳米复合材料的制备方法,并对纳米技术在水性PU中的发展应用作了展望。  相似文献   

4.
纳米材料在水处理中的应用研究   总被引:14,自引:0,他引:14  
纳米技术包括纳米结构和纳米材料。作者从纳米TiO2光催化氧化技术、纳滤膜技术和纳米吸附材料等三方面介绍了纳米技术在水处理中应用的原理、材质和特点,讨论了崭新的纳米水处理技术的应用前景。  相似文献   

5.
综述了国内外无机纳米材料研究的成果与进展,对各种金属与非金属无机纳米材料的种类、具有各种特异性能和用途作了系统的介绍,并系统地阐述了无机纳米材料的各种物理或化学的制备技术,讨论了各种制备方法的特点、适用范围以及国内外在无机纳米材料制备方法研究上的进展,并介绍了目前国内常用的一些无机纳米材料的表征方法及其特点和应用。  相似文献   

6.
张志檩 《现代化工》2001,21(12):1-5
纳米材料由于其独特的物理化学性能而广泛应用于各个领域.介绍了纳米技术在石油化工中的发展现状,从纳米催化材料、纳米塑料、纳米橡胶、纳米纤维、燃料电池、节能添加剂及环境保护几方面展望纳米技术的发展.指出我国应以石油化工纳米材料的工业化为突破口,大力研制开发石油化工纳米新材料.  相似文献   

7.
纳米技术与纳米材料   总被引:15,自引:0,他引:15  
李钟华  张秀媚 《化工进展》1996,(2):20-22,27
纳米技术是一种很有发展前途的新兴技术。本文简要地综述了纳米技术在各学科领域中的应用及由此产生的纳米材料。  相似文献   

8.
纳米材料及纳米技术在涂料中的应用   总被引:1,自引:0,他引:1  
黄碧君  张力 《上海涂料》2005,43(11):25-28
介绍了纳米材料及其技术在涂料中的应用情况,简要介绍了具有抗老化、抗菌、防污、导电、隐身等功能的纳米复合涂料.还介绍了纳米复合涂料的一般制备方法.  相似文献   

9.
纳米技术是当前科学研究领域的热门,将纳米技术应用到石膏中,可以制备出性能更好的材料。对纳米技术在石膏中的应用研究进展做了介绍,发现纳米材料能使石膏具备光催化性、相变储能性,提高石膏的力学性能、生物耐久性等,与此同时,还可以制备纳米CaSO_4及其他纳米材料。指出了目前纳米技术在石膏中应用研究存在的问题,并对其发展前景做了展望。  相似文献   

10.
对近年来纳米技术在提高原油采收率方面的应用作了较详细的介绍和评述。其中包括由表面活性剂和疏水改性纳米粒子组成的纳米乳液、纳米粒子增强的粘弹表面活性剂体系、固体纳米粒子稳定的CO2气体泡沫和纳米分子沉积膜的作用机理及提高采收率的应用效果;还包括微-纳米颗粒封堵技术、纳米降压增注技术、纳米材料改性破乳技术、尤其是油藏纳米机器人等技术在石油开发方面的应用;并提出了应用于提高石油采收率领域的纳米技术发展方向。  相似文献   

11.
12.
Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.  相似文献   

13.
In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.  相似文献   

14.
Glycidyl carbamate chemistry combines the excellent properties of polyurethanes with the crosslinking chemistry of epoxy resins. Glycidyl carbamate functional oligomers were synthesized by the reaction of polyfunctional isocyanate oligomers and glycidol. The oligomers were formulated into coatings with several amine functional crosslinkers at varying stoichiometric ratios and cured at different temperatures. Properties such as solvent resistance, hardness, and impact resistance were dependent on the composition and cure conditions. Most coatings had an excellent combination of properties. Studies were carried out to determine the kinetics of the curing reaction of the glycidyl carbamate functional oligomers with multifunctional and model amines. Detailed kinetic analysis of the curing reactions was also undertaken. The results indicated that the glycidyl carbamate functional group is more reactive than a glycidyl ether group. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, on October 27–29, 2004, in Chicago, IL.  相似文献   

15.
A highly moisture-proof polysilsesquioxane coating was obtained from a new bis-silylated precursor, which was synthesized from 3-aminopropyltriethoxysilane (APTES) and m-xylylene diisocyanate (m-XDI) in tetrahydrofuran (THF) and verified by 1H MAS NMR. For direct comparison purposes, an SiO2 coating was also prepared by the Stöber method using tetraethoxysilane (TEOS) as the reactant. Interestingly, the coating obtained from the polysilsesquioxane sol exhibited a much higher moisture resistance capability than its counterpart, which was attributed to its more compact feature between nanoparticles as characterized by N2 absorption experiment and transmission electron microscopy (TEM). Furthermore, its high transparency of about 92% showed potential for application in the protection of optical crystals.  相似文献   

16.
Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.  相似文献   

17.
18.
19.
20.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号