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功能高分子材料,是七十年代从高分子科学与现代技术领域发展起来、与其他学科密切结合而产生的一类新型材料。所涉及范围甚广,内容非常丰富。目前还处于开拓阶段。功能高分子材料,通常是指材料受到物理或化学的外部刺激、或者与其他物质发生相互作用后,产生物理或化学变化,从而完 相似文献
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随着新技术的发展,Sc、Y 和15种镧系元素(La~Lu)作为构成新技术核心的功能材料,颇受关注。这类稀土金属和化合物尚属开发中的材料,因此有许多奥秘有待探索和未知的魅力有待开发。可以预料,以 相似文献
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梯度功能材料的研究与展望 总被引:25,自引:0,他引:25
梯度功能材料是基于一种全新的材料设计概念合成的新型复合材料,本文叙述了梯度功能材料的概念和开发背景,着重介绍了梯度功能材料的研究内容和现状以及在航天、核能、电子、光学、生物医学等领域的应用前景,并展望了这种新材料今后的研究动向。 相似文献
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生物医用有色金属材料发展迅速,形成了适应不同体内环境、不同组织的医用有色金属材料及器件体系;着眼未来开展领域研究规划,提升新型医用有色金属材料及器件的临床应用水平,兼具理论研究与实践应用价值。本文论述了生物医用有色金属材料在耐蚀性、耐磨性、疲劳强度及韧性、生物适配性等方面的关键性能要求,系统梳理了永久性植入有色金属材料、生物可降解有色金属材料、多孔医用有色金属材料、医用有色金属表面改性等细分领域的研究进展、发展趋势与科学问题。在凝练各类生物医用有色金属材料未来研究方向的基础上,提出了加强基础与关键核心技术研究、组建“产学研医监”协同创新体、建立相关标准及规范、培育高精尖人才体系等发展建议,以期为新型材料发展布局与前沿技术研发提供先导性参考。 相似文献
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功能性聚烯烃的开发及应用 总被引:3,自引:0,他引:3
功能性聚烯烃在聚烯烃中占有重要地位。本文对最近出现的通过共聚、接枝、有机化学反应、低分子量化、共混复合等方法制得的功能性聚烯烃的开发应用情况进行了论述和评价。 相似文献
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水泥基复合功能材料的研究与开发 总被引:9,自引:0,他引:9
本文介绍了借鉴功能陶瓷和功能塑料的理论和实践,研究与开发的水泥基功能材料。并阐明了各种水泥基复合功能材料如导电材料、屏蔽材料、磁性材料、电热材料,以及高强水泥基复合功能材料等的组成、性能和复合工艺。 相似文献
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Natalia C. Tansil Leng Duei Koh Ming‐Yong Han 《Advanced materials (Deerfield Beach, Fla.)》2012,24(11):1388-1397
Silkworm silk is among the most widely used natural fibers for textile and biomedical applications due to its extraordinary mechanical properties and superior biocompatibility. A number of physical and chemical processes have also been developed to reconstruct silk into various forms or to artificially produce silk‐like materials. In addition to the direct use and the delicate replication of silk's natural structure and properties, there is a growing interest to introduce more new functionalities into silk while maintaining its advantageous intrinsic properties. In this review we assess various methods and their merits to produce functional silk, specifically those with color and luminescence, through post‐processing steps as well as biological approaches. There is a highlight on intrinsically colored and luminescent silk produced directly from silkworms for a wide range of applications, and a discussion on the suitable molecular properties for being incorporated effectively into silk while it is being produced in the silk gland. With these understanding, a new generation of silk containing various functional materials (e.g., drugs, antibiotics and stimuli‐sensitive dyes) would be produced for novel applications such as cancer therapy with controlled release feature, wound dressing with monitoring/sensing feature, tissue engineering scaffolds with antibacterial, anticoagulant or anti‐inflammatory feature, and many others. 相似文献
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This article presents a new semidistance for functional observations that generalizes the Mahalanobis distance for multivariate datasets. The main characteristics of the functional Mahalanobis semidistance are shown. To illustrate the applicability of this measure of proximity between functional observations, new versions of several well-known functional classification procedures are developed using the functional Mahalanobis semidistance. A Monte Carlo study and the analysis of two real examples indicate that the classification methods used in conjunction with the functional Mahalanobis semidistance give better results than other well-known functional classification procedures. This article has supplementary material online. 相似文献
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Marija Vukomanović Lea Gazvoda Mario Kurtjak Marjeta Maček-Kržmanc Matjaž Spreitzer Qiao Tang Jiang Wu Hao Ye Xiangzhong Chen Michele Mattera Josep Puigmartí-Luis Salvador Vidal Pane 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(35):2301981
Poly-L-lactide (PLLA) offers a unique possibility for processing into biocompatible, biodegradable, and implantable piezoelectric structures. With such properties, PLLA has potential to be used as an advanced tool for mimicking biophysical processes that naturally occur during the self-repair of wounds and damaged tissues, including electrostimulated regeneration. The piezoelectricity of PLLA strongly depends on the possibility of controlling its crystallinity and molecular orientation. Here, it is shown that modifying PLLA with a small amount (1 wt%) of crystalline filler particles with a high aspect ratio, which act as nucleating agents during drawing-induced crystallization, promotes the formation of highly crystalline and oriented PLLA structures. This increases their piezoelectricity, and the filler-modified PLLA films provide a 20-fold larger voltage output than nonmodified PLLA during ultrasound (US)-assisted activation. With 99% PLLA content, the ability of the films to produce reactive oxygen species (ROS) and increase the local temperature during interactions with US is shown to be very low. US-assisted piezostimulation of adherent cells directly attach to their surface (such as skin keratinocytes), stimulate cytoskeleton formation, and as a result cells elongate and orient themselves in a specific direction that align with the direction of PLLA film drawing and PLLA dipole orientation. 相似文献
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本文论述了功能材料的特点及其制造技术和航空工业中的重要作用,并根据我国航空功能材料的现状,提出进行航空功能材料应用研究的建议。 相似文献
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本文介绍了可直接窥视大脑内部活动过程的核磁共振功能成像技术的基本原理、技术要点、临床应用举例及其目前尚存在的问题。 相似文献
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功能梯度材料:回顾与展望 总被引:2,自引:0,他引:2
本文阐述了功能梯度材料的种类、主要制备方法以及国内外研究进展和应用,对该领域的几个重要热点问题进行了讨论。此外,提出了一种新的梯度材料制备方法——等离子喷焊法,分析了该法的特点。 相似文献