适用于3D打印技术的ABS/SEBS复合材料制备

采用热塑性弹性体苯乙烯–乙烯–丁烯–苯乙烯嵌段共聚物(SEBS)对丙烯腈–丁二烯–苯乙烯塑料(ABS)进行改性,制备3D打印ABS/SEBS复合材料,研究了SEBS的用量对3D打印ABS/SEBS复合材料流动性能、力学性能与热降解行为的影响。结果表明,随SEBS用量的增加,ABS/SEBS复合材料的熔体流动速率先增加后降低;随SEBS用量增加,ABS/SEBS复合材料的冲击强度增加,SEBS能提高ABS/SEBS复合材料的断裂伸长率,但同时也使拉伸强度和弯曲强度降低;随SEBS用量的增加,ABS/SEBS复合材料的热稳定性增加;当SEBS质量分数为15%时,ABS/SEBS复合材料在3D打印中的综合性能最好。     

新型3D打印材料ABS的制备及性能研究

为了解决3D打印材料的性能、应用范围有限及成本高等问题,通过优化连续本体法制备了新型3D打印材料ABS,并利用扫描电镜法、傅里叶变换红外光谱法和热重法等对ABS进行了组织结构表征和热稳定性及其他性能测试。结果表明,优化后的工艺不但能成功制备ABS且制备出的ABS具备成本低、热稳定性好、抗冲击性能高等优点。     

3D打印用ABS丝材性能研究

以丙烯腈–丁二烯–苯乙烯塑料(ABS)为基体,分别以碳酸钙、短切玻璃纤维(GF)和色母粒为改性填料,通过挤出成型制备改性ABS丝材,然后采用3D打印技术中的熔融沉积成型(FDM)技术,通过FDM型3D打印机打印测试试样,对其力学性能及收缩率展开研究。研究结果表明,碳酸钙填料的加入使得ABS 3D打印试样的拉伸强度降低,用量为2份的短切GF可略微提高试样的拉伸强度,但随着GF含量的增加拉伸强度下降;当打印速度不高于50 mm/s时,相比于橘黄色母粒,蓝色母粒可提高试样的拉伸强度;改性ABS试样的拉伸性能随着打印速度的增加呈现两种不同的变化趋势,这可能由材料流动性能的差异所引起;随碳酸钙或GF用量增加,试样的收缩率逐渐降低,其中GF改性ABS试样收缩率的降低幅度更大,相比于橘黄色母粒,蓝色母粒的加入能够更有效地降低ABS试样的收缩率。     

超细二氧化硅改性3D打印用ABS树脂的性能研究

3D打印技术属于快速成型技术的一种,被认为是第三次工业革命的核心技术之一,而3D打印材料是影响3D打印技术发展与应用的关键因素。本文通过加入超细二氧化硅微粉,改善了ABS树脂的尺寸稳定性能、加工性能和力学性能,使其能适用于3D打印领域。     

3D打印材料的研究及发展现状

对3D打印材料进行了分类和论述,将3D打印材料分为有机高分子材料和无机材料两大类,前者包括丙烯腈苯乙烯丁二烯共聚物(ABS)、聚乳酸(PLA)、聚酰胺(PA)、光敏树脂以及水凝胶等;后者包括钛及钛合金、陶瓷和石膏等。分别阐述了其性能和优缺点以及在3D打印领域的应用现状,并对3D打印材料的发展前景进行了展望。     

常见3D打印用ABS树脂的成分和拉伸性能分析

采用傅里叶变换红外光谱法(FTIR)、拉曼散射光谱法(Raman)对几种国产和进口3D打印用丙烯腈-丁二烯-苯乙烯共聚物(ABS)丝材进行了成分鉴定,分别甄选出了合格及不合格ABS丝材;将合格的ABS样品通过3D熔融沉积快速成型技术(FDM)打印成国标试样,并进行拉伸性能测试,讨论了各ABS丝材在成分、拉伸性能及打印性能上的差异。结果表明:通过FTIR及Raman光谱分析,能够对ABS丝材的质量及成分进行鉴定。几种合格丝材样品中,国产样品C4的拉伸屈服强度最高(43.6 MPa),而进口样品I3具有最低的拉伸屈服强度(33.7 MPa),但丝材I3的打印产品翘曲度小,尺寸精度相对稳定。     

热塑性聚氨酯(TPU)3D打印研究进展

热塑性聚氨酯(TPU)具有高弹性和生物相容性,在工业和医疗领域中均得到了广泛应用,3D打印技术进一步拓展了TPU材料在医疗领域的应用。但是,热塑性聚氨酯的部分性能特点不利于3D打印成型,在一定程度上限制了其在3D打印中的应用,因此,需要对TPU材料进行改性。从3D打印工艺、工艺参数、专用材料、掺杂改性及先进应用领域研究5个方面,综述了TPU材料3D打印的国内外研究进展。介绍了FDM和SLS 2种可用于TPU材料3D打印的工艺方法,并且对国内外TPU打印材料力学性能与掺杂改性的研究现状进行了总结。同时,分析了TPU材料3D打印在鞋类加工和医学研究领域的应用发展,并且对3D打印TPU在医疗领域的应用前景进行了展望。     

3D打印成型工艺及其应用研究

从增材制造的实现原理出发,分析了当前几种主流三维（3D）成型工艺的技术特点、设备原理及实现流程。以工业级3D打印机为研究平台,将熔融沉积成型（FDM）工艺应用于复杂型腔结构和传动组件结构的快速成型,通过3D建模、数据转化、切片处理、工艺参数选择、模型包计算及工艺后处理等一系列环节的实践探索,明确了FDM成型工艺的技术原理与应用流程,并成功制作了丙烯腈丁二烯苯乙烯共聚物（ABS）材质的3D打印模型。结果表明,复杂型腔零件切片厚度为0.254 mm、传动组件切片厚度为0.178 mm时,3D成型件具有理想的工艺精度和打印效率。     

盛禧奥MAGNUMABS树脂开拓3D打印新应用

<正>盛禧奥与德国著名3D打印公司ADVANC3D Materials合作,为该公司的3D打印丝状材料提供原材料。3D打印市场发展迅速,目前塑料在全球3D打印材料市场占据最大份额。这次盛禧奥与ADVANC3D Materials合作,为3D打印提供的材料包括:MAGNUM ABS树脂及医疗级树脂,EMERGE PC/ABS高级树脂。针对当前3D打印常用的直径1.75 mm及2.85 mm的卷轴丝状材料,盛禧奥均可提     

MWNTs/ABS导电3D打印复合耗材的制备与性能

通过双螺杆共混挤出制备不同含量的多壁碳纳米管(MWNTs)/丙烯腈-丁二烯-苯乙烯共聚物(ABS)导电3D打印复合材料。研究了挤出加工次数和MWNTs含量对导电3D打印复合材料的导电性能的影响,分析了不同MWNTs添加量导电3D打印材料的力学行为。结果表明:随挤出加工次数的增加,MWNTs在ABS中的分散更加均匀;增加MWNTs含量不仅可以显著提高3D打印材料的导电性,而且也能提高复合材料的拉伸强度和显微硬度,但材料的韧性下降明显。控制最佳挤出条件,制成了具有防静电功能的导电3D打印复合材料,进行熔融沉积成型(FDM)打印测试效果良好。     

3D打印用高分子材料及打印成型工艺参数优化研究进展

综述了近年来应用在3D打印成型技术中的高分子材料。其中,通用塑料包括综合性能优异的丙烯腈-丁二烯-苯乙烯三元共聚物、可生物降解的聚乳酸和聚己内酯;典型工程塑料和特种工程塑料主要包括聚碳酸酯和聚醚醚酮;热固性塑料主要有光敏树脂。不同的高分子材料性能不同,所采用的3D打印技术也各不相同,最终制备的3D打印制件应用领域也各不相同。除了对制件母材进行筛选外,3D打印工艺参数也会对制件质量产生显著的影响,而计算机辅助技术在这一方面的应用较为广泛。     

3D打印高分子材料研究进展

主要介绍了聚乳酸(PLA),聚己内酯(PCL),聚醚醚酮(PEEK),聚碳酸酯(PC)和丙烯腈-丁二烯-苯乙烯塑料(ABS)等在3D打印技术中的应用,并且综述了这些材料相应的改性方法以及改性材料的应用性能。通过对已有3D打印材料的改性和扩充,3D打印产品将可以广泛应用到医疗、生物组织工程、工业、军事、航空航天等领域,3D打印技术也将成为一种主流的塑料加工技术。     

螺杆挤出式3D打印机结构设计与仿真分析

分析了传统桌面级FDM型3D打印机与螺杆挤出式3D打印机的挤出原理,为提升桌面级FDM型3D打印机对打印材料的兼容性并降低打印材料的制作成本,设计了螺杆挤出式3D打印机新结构,具有螺杆与机筒便捷拆换功能.结合设计计算获得了适用于打印丙烯腈?丁二烯?苯乙烯共聚物(ABS)材料的螺杆计量段结构,在螺杆低转速与小型化的要求下...     

自行车把套的3D打印定制

针对市场对产品个性化日益增长的需求,对自行车把套进行3D打印定制案例研究.对市场上自行车把套的特点和定制方法进行分析,运用Solidworks进行把套初样模型的设计,以其3D打印件作为骨架制作油泥模型,通过视觉和手掌触握的检验方法进行修补和完善,构建出高贴合度和舒适度的把套曲面轮廓,实现"以物适手".3D扫描采集油泥模...     

Study on performance characteristics of fused deposition modeling 3D-printed composites by blending and lamination

Component contacting degree in a composite material is an important reference for evaluation the performance characteristics. In this article, two composite material systems involving polylactic acid (PLA) with acrylonitrile butadiene styrene (ABS) and PLA with thermoplastic polyurethane (TPU) were prepared by blending and laminating through fused deposition modeling (FDM) 3D printing technology. The mechanical and thermal properties of the as-prepared composite materials were examined. The results indicated that PLA and TPU played a dominant role in tensile strength and breaking elongation, respectively, in individual composite material. ABS and TPU changed the glass transition peek, crystallinity, and modulus of PLA. The results also suggested that although the processing design of the blending method was more suitable for the contact between two components, but the mechanical properties of laminated composites were closer to theoretical predictions. The structural design and processing technology provide a comparative method and reference basis for studying the performance characteristics of composite materials.     

Optimizing 3D printing performance of acrylonitrile‐butadiene‐styrene composites with cellulose nanocrystals/silica nanohybrids

The preparation of 3D printed products with excellent comprehensive performance is still receiving much attention. Cellulose, the most abundant and green natural polymer, was used in this study to fabricate polymeric composites used for 3D printing. Specifically, novel cellulose nanocrystals/silica nanohybrids (CSNs) were synthesized via the sol–gel method using cellulose nanocrystals (CNCs) obtained by hydrolysis of sulfuric acid as raw materials, and the thermostability was significantly improved due to the adsorption of silica (SiO₂) on the surface of the CNCs via hydrogen bonding and covalent bonds. Subsequently, the CSNs were used in fused deposition modeling (FDM) with acrylonitrile‐butadiene‐styrene (ABS) as the matrix. Unlike ABS/CNC product which shows obvious yellowing, the ABS/CSN product shows a smooth undefiled surface, demonstrating their excellent applicability to high temperature FDM molding. Further, the effect of different silane coupling agents on the mechanical properties was compared and organically modified CSNs (oCSNs) were prepared using KH570 to optimize the dispersion of the filler and the interaction with the matrix. Satisfactorily, the addition of organically modified oCSNs not only does not degrade the fluidity but it also eliminates the warpage of FDM products and improves both layer adhesion and mechanical properties. This study provides a pioneering strategy for the thermal processing applications of CNCs and the modification of FDM products. © 2019 Society of Chemical Industry     

3D-printed polymer packing structures: Uniformity of morphology and mechanical properties via microprocessing conditions

Three-dimensional (3D) printing is an attractive approach to fabricate highly porous extremely lightweight structures for architecture antivibrational packaging. We report 3D printing processing of model packaging structures using biodegradable poly(lactic acid) (PLA) as a source material, with acrylonitrile butadiene styrene (ABS) utilized as a common 3D printing source material as a traditional benchmarked material. The effects of printing temperature, speed, and layer morphology on the layer-by-layer 3D-printed structures and their mechanical properties were considered. Three different characteristic morphologies were identified based on printing temperature; the microscopic surface roughness was dependent on the printing speed and layer height. We demonstrate that the mechanical performances and surface properties of 3D-printed PLA structures could be improved by optimization of printing conditions. Specifically, we evaluate that these PLA-based 3D structures printed exhibited better surface qualities and enhanced mechanical performance than traditional ABS-based structures. Results showed that the PLA-based 3D structures possessed the favorable mechanical performance with 34% higher Young's modulus and 23% higher tensile strength in comparison to the ABS-based 3D structures. This study provides guidelines for achieving high-quality 3D-printed lightweight structures, including smooth surfaces and durable mechanical properties, and serves as a framework to create biodegradable 3D-printed parts for human use.     

TPU对ABS熔融沉积成型性能的影响

采用熔融共混制备丙烯腈-丁二烯-苯乙烯共聚物/热塑性聚氨酯（ABS/TPU）3D打印耗材,通过熔融沉积成型（FDM）制备标准测试样条,并对ABS/TPU体系的成型性能、力学性能、微观结构、流变性能进行研究。结果表明,TPU改性ABS的成型性能均优于未改性ABS,当TPU质量分数大于20 %时,成型过程不发生翘曲收缩现象;同时有较好的力学性能,缺口冲击强度为18.81 kJ/m2比纯ABS提高了95.94 %,拉伸强度为32.92 MPa,下降了8.5 %;TPU质量分数大于20 %时,材料发生韧性断裂,并随TPU的增加,断面粗糙程度增加,有空洞现象;ABS/TPU具有较好的相容性,且随TPU含量增加,ABS/TPU分子链扩散能力增加。     

Naturally Derived Maleic Chitosan/Thiolated Sodium Hyaluronate Hydrogels as Potential 3D Printing Tissue Engineering Materials

3D printing is an attractive method to accurately construct artificial organs or alternative materials with complicated structures and functional performance. Naturally derived hydrogels have emerged as promising materials for the preparation of biomimetic 3D organization or scaffolds by 3D printing due to their good biocompatibility, high water content, and fascinating 3D network. However, the poor printing properties and weak structural stability of naturally derived hydrogels limit their applications. In this study, photopolymerizable hydrogels are designed based on maleic chitosan (MCS) and thiolated sodium hyaluronate (SHHA). The Michael addition between MCS and SHHA improves the viscosity of the mixed solution. Moreover, it benefits the 3D printing process, followed by photopolymerization (acrylate-thiol step-chain polymerization and acrylate–acrylate chain polymerization) to form a stable covalent network rapidly. The rheological property, swelling behaviors, microstructure, and in vitro degradation are tuned by adjusting the molar ratio of the thiol group and acrylate group. In addition, MCS/SHHA hydrogel scaffolds with good accuracy and enhanced structural stability are prepared using extrusion-based 3D printing and photopolymerization technology. The hydrogels display excellent cytocompatibility and can support adherence of L929 cells, which can be used as prospective materials for tissue engineering applications.