生物降解PHBV/天然植物纤维复合材料的界面改性研究进展

总结了近年来国内外关于聚羟基丁酸酯-co-羟基戊酸酯共聚物（PHBV）/天然植物纤维复合材料界面改性的研究进展。从天然植物纤维表面改性、在PHBV和天然植物纤维体系中添加界面改性剂以及对PHBV树脂基体进行改性等方面,来增强天然植物纤维与PHBV界面结合力,并使纤维在PHBV基体中分散更好。同时比较了这些改性方法的优劣,展望了此类材料的发展前景。     

木塑复合材料界面改性研究进展

提高木粉在树脂基体中的分散性,增加木粉与树脂基体的粘结性对于提高木塑复合材料力学性能有着至关重要的作用。从木粉等植物纤维的表面物理改性和化学改性两方面系统的介绍了国内外对木塑复合材料界面改性的方法及其对复合材料性能的影响。     

天然植物纤维预处理方法对水泥基复合材料性能的影响研究进展

近年来,天然植物纤维用来增强水泥基材料受到了广泛关注。与合成纤维相比,天然植物纤维具有绿色环保、质量轻、低成本、可再生等众多的优点,在许多领域都有大量应用。然而,天然植物纤维易吸水膨胀、与水泥基体相容性差,不能直接应用于水泥基材料中,需通过对天然植物纤维进行适当的预处理改善其对水泥基复合材料性能的不利影响。基于天然植物纤维的结构及材料组成,综述了天然植物纤维的水处理、涂覆处理、蒸汽处理、碱处理、酸处理、硅烷偶联剂处理、混合处理等方法以及这些预处理方法对天然植物纤维增强水泥基复合材料性能影响的最新进展。     

改进植物纤维/热塑性塑料复合材料界面相容性的技术进展

综述了国内外在改进天然植物纤维增强热塑性塑料复合材料界面相容性方面所做的研究工作及最新进展,分析了复合材料界面相容性的影响因素。目前改进界面相容性的方法主要包括:天然植物纤维的表面处理,如碱化和酯化预处理、接枝改性、浸润处理、表面物理加工;添加合适的界面改性剂(如界面相容剂、化学偶联剂、表面活性剂等);以及塑料基体改性等;其他因素对复合材料相容性也有影响。     

天然植物纤维增强环氧树脂复合材料研究进展

从天然植物纤维及其改性方法、基体环氧树脂及特性和复合材料的成型方法等方面综述了近年来国内外利用天然植物纤维增强环氧树脂复合材料的研究进展。     

木质纤维增强环氧树脂复合材料的制备及性能研究(摘要)

<正>天然植物纤维增强环氧树脂复合材料具有低成本、低能耗、环境友好等优良特性,近年来成为国内外研究热点,受到广泛关注。然而,天然植物纤维存在易吸湿、与基体树脂相容性差等缺点,在复合材料中的应用受到限制。本研究以木材剩余物杨木枝桠材为原料,通过机械粉碎法及化学机械浆法制备了杨木粉、杨木纤维;分别采用桐马酸酐甲酯、异氰酸酯/硅烷偶联剂和长链不饱和脂肪酸对杨木粉及杨木纤维表面改性,经热压成型制备了木质纤维增强环氧树脂复合材料。改性木质纤维表面疏水性高,与环氧树脂具有良好的界面相容性;制备的木质纤维增强环氧树脂复合材料,性能与     

植物纤维／热塑性树脂界面胶接作用研究

植物纤维(指植物纤维和纤维素纤维〕是自然界最为丰富的天然高分子,通过共混工艺生产的植物纤维/热塑性树脂(简称PFRTP)复合材料是有效地开发和利用这一资源的新途径。由于该复合材料具有质轻、加工性能好及可生物降解等优点,因而在许多领域有广泛的应用前景。木粉就是植物纤维中的一种,由于植物纤维有较强的极性,使其与非极性树脂(如PP、PE等)间的界面润湿性、界面粘合作用极差,导致未经表面处理的植物纤维/热塑性树脂复合材料的机械强度较低。因此解决好植物纤维与树脂的相容性,改善植物纤维/热塑性树脂界面胶接作用是提高PFRTP复合材料性能的关键技术问题。本文进行了木粉填充改性PP、ABS树脂的实验研究,对如何改善植物纤维/热塑性树脂界面胶接作用及其机理进行了探讨。     

可降解聚乳酸/天然植物纤维复合材料的研究进展

从复合材料的植物纤维原材料类型、加工复合方式、增塑改性及增容改性等方面论述各种因素对可降解聚乳酸/天然植物纤维复合材料综合性能的影响,分析了该类型复合材料的研究现状,且着重介绍了增容改性的几种不同方式,并就此类型复合材料的发展趋势与前景进行展望。     

天然植物纤维增强聚丙烯复合材料研究进展

介绍了天然植物纤维（NVF）的种类和性质;概述了NVF与聚丙烯（PP）基体材料相容性的改性方法,主要包括物理改性和化学改性;综述了近年来国内外关于NVF增强PP基复合材料性能的研究进展;展望了PP/NVF复合材料的研究方向     

亚麻纤维增强复合材料湿热环境中界面性能研究

为了全面研究植物纤维增强复合材料界面的湿热行为,亚麻纤维增强环氧树脂复合材料以亚麻纤维作为增强材料,环氧树脂作为基体材料,采用真空辅助树脂传递模塑(RTM)成型工艺制备复合材料层合板,通过探究亚麻/环氧复合材料在湿热环境条件下的吸水率和界面剪切强度的变化,并借助扫描电子显微镜(SEM)、傅里叶红外光谱仪(FTIR)等材料表征设备,分析了植物纤维增强高分子基复合材料在湿热条件下微观结构的变化,揭示了植物纤维增强高分子复合材料在湿热环境下其界面性能下降的机理,为植物纤维增强复合材料的应用与界面改性提供了大量的理论依据。     

Pretreatments of natural fibers and their application as reinforcing material in polymer composites—A review

In recent years, natural fibers reinforced composites have received much attention because of their lightweight, nonabrasive, combustible, nontoxic, low cost and biodegradable properties. Among the various natural fibers; flax, bamboo, sisal, hemp, ramie, jute, and wood fibers are of particular interest. A lot of research work has been performed all over the world on the use of natural fibers as a reinforcing material for the preparation of various types of composites. However, lack of good interfacial adhesion, low melting point, and poor resistance towards moisture make the use of natural fiber reinforced composites less attractive. Pretreatments of the natural fiber can clean the fiber surface, chemically modify the surface, stop the moisture absorption process, and increase the surface roughness. Among the various pretreatment techniques, graft copolymerization and plasma treatment are the best methods for surface modification of natural fibers. Graft copolymers of natural fibers with vinyl monomers provide better adhesion between matrix and fiber. In the present article, the use of pretreated natural fibers in polymer matrix‐based composites has been reviewed. Effect of surface modification of natural fibers on the properties of fibers and fiber reinforced polymer composites has also been discussed. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers     

植物纤维/聚乳酸生物质复合材料的制备及应用现状

聚乳酸是目前已开发的生物降解高分子中最具潜力的一种。尽管它具有众多优异的性能,但是,仍存在一些如脆性大、成型稳定性差等缺点。因此,对聚乳酸进行复合改性是目前重要的研究趋势。文章综述了近年来聚乳酸基生物质复合材料的研究进程。以聚乳酸为基体,以麻纤维、木纤维、竹纤维或其它植物纤维为生物质填料,采用热压、挤出等方法生产不同种类的聚乳酸基生物质复合材料,介绍了植物纤维的改性方法,如碱处理、化学改性、微生物改性等,并对这些生物质复合材料的力学性能、热稳定性能、结晶性能、尺寸稳定性能等进行了简要阐述,同时,对聚乳酸基生物质复合材料的应用领域及开发前景进行了展望。     

植物纤维增强混凝土研究进展

随着我国“双碳”战略的持续推进,绿色低碳环保的天然纤维在水泥基材料中的应用已成为建筑行业的研究热点,得到了广泛关注。但植物纤维的力学性能差,同时存在老化和粘结力减弱等问题,很难直接应用于混凝土基体。本文综述了植物纤维的微观结构和性能,植物纤维对混凝土力学性能、耐久性和热物理性能等宏观性能的影响,植物纤维增强混凝土凝结时间、界面粘结和内养护的微观演变机制。讨论了植物纤维增强混凝土中基体改性和纤维改性的方法,深入了解不同方法的作用机理,寻求更加有效地改善性能的途径。剑麻纤维和竹纤维对混凝土性能有良好的提升作用,应用最为广泛。最后展望了植物纤维的可持续发展方向,为今后进一步研究植物纤维增强混凝土提出参考建议。     

聚乳酸/植物纤维全生物降解复合材料的研究进展

综述了聚乳酸(PLA)/植物纤维复合材料的研究现状,分别从植物纤维的来源及类型、纤维和PLA基体的界面改性、复合材料的制备方法等方面介绍了复合材料的研究进展。最后,展望了PLA/植物纤维全生物降解复合材料的发展趋势。     

玄武岩纤维表面改性的研究进展

纤维增强复合材料的力学性能主要受到纤维性能、树脂性能以及纤维与树脂间的复合材料界面性能影响。在实际应用中,纤维表面改性是增强纤维和基体之间结合力,拓展应用领域的关键。本文综述了国内外玄武岩纤维的几种改性工艺,总结了各种表面改性方法的作用机理及其改性效果,并简要介绍了玄武岩纤维的性质及应用。研究发现,玄武岩纤维经过改性后,其性能均有所改善,如表面活性提高、强度增大、界面黏结力增强等,这有利于其作为增强体制备各种性能优异的复合材料,从而应用于土木建筑、汽车船舶、石油化工、航空航天等领域。此外,本文最后还指出了玄武岩纤维改性领域目前存在的主要问题,并对未来该领域研究发展方向做出展望。     

Recent developments in chemical modification and characterization of natural fiber‐reinforced composites

A critical review of the literature on the various aspects of natural fibers and biocomposites with a particular reference to chemical modifications is presented in this paper. A notable disadvantage of natural fibers is their polarity which makes it incompatible with hydrophobic matrix. This incompatibility results in poor interfacial bonding between the fibers and the matrix. This in turn leads to impaired mechanical properties of the composites. This defect can be remedied by chemical modification of fibers so as to make it less hydrophilic. This paper reviews the latest trends in chemical modifications and characterizations of natural fibers. The structure and properties of natural fibers have been discussed. Common chemical modifications and their mechanisms have also been elaborated. The importance of chemical modifications and the resultant enhancement in the properties of the composites have also been reviewed. Recent investigations dealing with chemical modifications of natural fiber‐reinforced composites have also been cited. POLYM. COMPOS., 2008. © 2007 Society of Plastics Engineers     

高性能纤维表面改性研究进展

高性能纤维具有优异的性能,广泛用于宇航和军事领域,但是其与树脂基体之间的界面粘接性能较差,复合材料的层间剪切强度较低。针对这一复合材料体系,全面论述了提高其性能的几种方法以及各种方法的优缺点,其中包括纤维表面接枝、偶联、聚合物涂层、冷等离子体、γ射线辐射和超声波处理等,同时介绍了改性纤维的性能表征方法。     

Unidirectional hemp and flax EP‐ and PP‐composites: Influence of defined fiber treatments

In some technical areas, mainly in the automotive industry, glass fiber reinforced polymers are intended to be replaced by natural fiber reinforced polymer systems. Therefore, higher requirements will be imposed to the physical fiber properties, fiber‐matrix adhesion, and the quality assurance. To improve the properties of epoxy resins (EP) and polypropylene (PP) composites, flax and hemp fibers were modified by mercerization and MAH‐PP coupling agent was used for preparing the PP composites. The effects of different mercerization parameters such as concentration of alkali (NaOH), temperature, and duration time along with tensile stress applied to the fibers on the structure and properties of hemp fibers were studied and judged via the cellulose I–II lattice conversion. It was observed that the mechanical properties of the fibers can be controlled in a broad range by using appropriate mercerization parameters. Unidirectional EP composites were manufactured by the filament winding technique; at the PP matrix material, a combination with a film‐stacking technique was used. The influence of mercerization parameters on the properties of EP composites was studied with hemp yarn as an example. Different macromechanical effects are shown at hemp‐ and flax‐PP model composites with mercerized, MAH‐PP‐treated, or MAH‐PP‐treated mercerized yarns. The composites' properties were verified by tensile and flexural tests. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 2150–2156, 2004     

Surface modification of sisal fibers: Effects on the mechanical and thermal properties of their epoxy composites

The aim of this paper is to evaluate the mechanical and thermal properties of sisal fiber reinforced epoxy matrix composites as a function of modification of sisal fiber by using mercerization and silane treatments. The changes introduced by the treatments on the chemical structure of sisal fibers have been analyzed by infrared spectroscopy (FTIR). Thermal behavior of both sisal fibers and composites has been studied by thermogravimetric analysis (TGA). Both treatments clearly enhanced thermal performance and also mechanical properties of fibers, being other physical properties also modified. Mercerization, above all when combined with silanization, led to significant enhancement on mechanical properties of composites as a consequence of increasing mechanical properties of fibers and improving fiber/matrix adhesion. POLYM. COMPOS., 26:121–127, 2005. © 2005 Society of Plastics Engineers