开题报告文献综述
芝麻秸秆粉/PLA复合材料的3D打印成型及性能研究的实验设计
摘要
近年来，3D打印技术及其材料迅猛发展，并在高端领域逐渐崭露头脚。打印材料主要涉及金属、无机非金属和聚合物材料，其中关于聚合物材料的研究最为广泛， 但大多聚合物材料属于石油基塑料，较难降解。聚乳酸 (PLA) 是一种可生物降解的全生物来源的聚合物材料，因此受到了研究人员的广泛关注。PLA具有优异的力学性能、透明性、抗菌性，易于加 工，但其结 晶性、韧性、耐热性差，加工过程中易发生热降解，且价格较高，限制了PLA在3D打印方面的应用。因此，众多学者对PLA进行了各种改性以改善其可打印性及其3D打印产品的性能，通常是制备复合材料进行共混改性。
本文简要地介绍聚乳酸复合材料共混改性的分类、PLA材料的3D打印成型工艺，发展现状等，并针对芝麻秸秆粉与PLA共混后用硅烷偶联剂改性对其复合材料性能的影响设计了实验方案，主要包括芝麻秸秆粉的最优含量、偶联剂的最优用量及比较芝麻秸秆粉粒径大小对性能的影响。
关键词： 聚乳酸，复合材料，3D打印，力学性能
The experiment design of 3D printing molding and performance research of sesame straw powder /PLA composite
ABSTRACT
In recent years, the rapid development of 3D printing technology and its materials, and in the high-end field is gradually emerging. Printing materials mainly involve metal, inorganic non-metal and polymer materials, among which polymer materials are the most widely studied, but most of them are petroleum-based plastics, which are difficult to be degraded. Polylactic acid (PLA) is of great interest to researchers. Because it is a biodegradable full biological source of polymer materials. PLA has excellent mechanical properties, transparency, antibacterial property and is easy to be machined, but it has poor crystallization, toughness and heat resistance, and is prone to thermal degradation in the processing process. Moreover, it has high price, which limits the application of PLA in 3D printing. Therefore, many scholars have made various modifications to PLA to improve its printability and the performance of its 3D printing products, usually by preparing composite materials.
This article briefly introduced the classification of polylactic acid composite material, the PLA material forming technique of 3 d printing, development status, etc., and for the sesame straw powder and PLA blending modified by silane coupling agent on the properties of the composite influence design the experiment scheme, mainly including the optimum content of sesame straw powder, the optimal dosage of coupling agent and compare the sesame straw powder particle size effects on performance.
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