可控热膨胀聚合物复合材料的挑战和机遇(英文)  

CHALLENGES AND OPPORTUNITIES FOR CONTROLLED THERMAL EXPANSION POLYMER COMPOSITES

作　　者：LIND Cora 

机构地区：[1]托利多大学化学系,美国托利多,OH43606

出　　处：《硅酸盐学报》2009年第5期689-695,共7页Journal of The Chinese Ceramic Society

摘　　要：负热膨胀(negative thermal expansion,NTE)材料可作为填料制备可控热膨胀复合材料。高质量聚合物复合材料的研发面临诸多挑战,包括 NTE填料与基体材料的相容性,NTE相的稳定性,颗料形貌和尺寸的控制及其对混合程度的影响。本文对影响聚合物复合材料成型中存在的诸多可能存在的问题进行了述评,讨论了对有望用作填料的 NTE材料的要求,即对NTE填料颗粒尺寸和相容性进行合成控制。通过晶体前驱体到目标NTE相的拓扑转变,可实现对颗粒尺寸的最优控制。Negative thermal expansion materials are of interest as filler particles in controlled thermal expansion composites. The preparation of high quality composites poses a number of challenges like compatibility of NTE material and composite matrix, stability of the NTE phase, and particle morphology and size, which affect mixing. This paper gives an overview of potential problems that can interfere with composite formation. Promising NTE materials for use as fillers are discussed, with a focus on synthetic control over filler particle size and compatibility. The best particle size control is achieved in systems with crystalline precursors that are related to the target NTE phases through topotactic transformations.

关 键 词：负热膨胀材料 纳米颗粒 聚合物 复合材料 钨酸锆 钼酸锆 钒酸锆 

分 类 号：TB321[一般工业技术—材料科学与工程] TB324