叠层成型用吸胶材料吸树脂量分析

本文介绍ＱＹ８９１１／Ｔ３００叠层复合材料成型过程中及胶材料吸树脂量的试验情况，对吸胶材料单位面积吸树脂量进行了分析，为ＱＹ８９１１／Ｔ３００叠层复合材料成型中吸胶系统的设定提供了试验依据。     

PCRBSC材料的原位凝固成型制备

依据淀粉颗粒的水中润胀吸水，在加热时产生糊化的特性，实现了一种新的陶瓷原位凝固成型方法。在固相含量接近50％(体积分数)的SiC陶瓷料浆中引入约3％(质量分数)的淀粉，用水溶加热的方法可以原位凝固成型各种形态的SiC陶瓷部件，获得致密、均匀的PCRBSC和RBSC坯体。经真空渗硅，制备出微现结构均匀，性能良好的SiC材料。     

多孔生物陶瓷的制备与成型技术

本文综述了近年来多孔生物陶瓷制备技术与成型技术的研究现状,简要评析了它们的优缺点,并讨论了多孔生物陶瓷今后的主要发展趋势。     

化工设备衬里氟材料和成型技术的应用

化工产业作为我国重要的基础产业,对我国经济的发展有着非常重要的作用。其中氟材料被广泛地应用到管道等化工设备当中,并且具有良好的效果。化工用的氟材料,主要是由聚四氯乙烯聚合而成的,其分子结构比较复杂,具有许多优点,在实际生产中能提升化工生产效率和质量。本文对化工设备衬里氟材料展开讨论分析,着重分析化工设备衬里氟材料的成型技术,希望能为相关技术人员提供帮助,促进化工设备衬里氟材料的广泛应用,实现化工产业的快速健康发展。     

反应注射成型技术及材料（连载九）

第五章　RIM制件的制备工艺（续二）4．6硬质自结应RIM材料硬质目结皮RIM材料有两类，一种是多孔（中密度）材料，一种是微孔材料。以官能度3～4、相对分子质量250～800的聚醚多元酸与多苯基多次甲基多异氰酸酯或其改性物加适量的发泡剂制备，常为闭孔结构，密度约400～1450kg／m3。密度400～600kg／m3材料性能见表5－15。硬质多孔自结皮聚氨酯RIM常用发泡剂除过去用的CFC－11外，目前推荐用CH2Cl2、HCFC－141b、低沸点碳氢化合物例如成洗、环成烷。使用低沸点有机化合物作发泡剂时，设备及操作间应配备完善的防火措施。采用HCFC…     

高分子材料成型及其控制

高分子材料成型技术和高分子材料控制技术在我国取得突破性的发展。现代化工业生产对高分子材料的需求越来越大,需要运用高分子成型技术来生产产品,以满足人们的日常生活所需。因此主要对高分子材料的成型技术进行了详细的分析。     

聚四氟乙烯多孔材料成型技术的研究和应用

着重讨论用模压法和拉伸法生产聚四氟乙烯多孔材料的工艺技术。介绍多孔制品的性能特点和应用范围。     

塑料成型加工新技术

内容简介：该书共分8章，系统介绍了30多种注塑成型技术、20多种塑料挤出成型和加工技术、35种容器类制品成型方法（中空吹塑类、滚塑类、热成型类、缠绕类）、13种固相成型方法,16种压力成型和传递成型方法、13种拉挤成型和快速成型方法。     

凝胶注模成型制备SiAION-SiC复相材料

Al、Si、SiO2和SiC为原料，采用凝胶注模成型及氮气气氛下烧成的方法制备了SiAION-SiC复相材料。对浆料的流变特性、坯体的性能及制品烧结性能进行了研究。     

滚塑成型用材料和应用市场

综述了滚塑成型发展历史、工业概况、材料、应用、市场及其动向,重点讨论了滚塑成型对材料（树脂和配混料）的要求和优缺点,比较了滚塑成型和其他中空成型方法的材料、成型、设计、模具和最终制品性能。     

复合材料壁板的数字化成型研究

以复合材料壁板类零件制造为例,介绍了数字化制造成型方法,研究了该方法在工艺仿真设计、模具设计制造、预浸料裁剪、铺贴等工艺环节中软件和数字化设备的应用过程,并对其制造精度和误差进行了定性分析。研究表明,通过复合材料数字化设计制造一体化软件(Fiber SIM)进行数字化设计与制造,打通了复合材料设计、裁剪、铺贴等数字化制造过程,改变了复合材料传统的制造模式,实现了模拟量向数字量传递,制造精度显著提高,同时缩短了制造周期,减少了人力投入。     

新型注塑成型工艺

介绍了在传统注射成型工艺的基础上逐渐发展起来的几种新型注射成型工艺。气体辅助注射成型、多层共注成型和气体辅助多层共注成型、并对其进行了较详细的描述。     

层状复合陶瓷的增韧与设计研究进展

综述了层状复合陶瓷的韧化机制,阐述了设计过程中单层的选材、强度、厚度,结构设计和界面设计等因素对断裂韧性等性能的影响,讨论了层状复合陶瓷发展存在的问题及对策,最后探讨了层状复合陶瓷的优化设计思路及下一步研究应注意的问题。     

Preparation and characterisation of laminated hydroxyapatite/chitosan composite hydrogels

Abstract

Chitosan (CS) has been proposed for the use of electrically modulated drug delivery. However, the gel fatigue makes CS hydrogel difficult to achieve precise and prolonged drug release. In this study, laminated hydroxyapatite (HAp)/CS composite hydrogels were prepared via solution intercalation method. Cyclic electrostimulation test revealed that the fatigue of neat CS was significantly improved by incorporation of laminated HAp. It is detected by transmission electron microscopy that laminated HAp distributed disorderly in the CS matrix, and the dimension of the HAp lamella is ～150 nm. Furthermore, the in vitro cytotoxicity of 2HAp/CS was evaluated by optical microscopy, scanning electron microscopy and [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. The prepared composite hydrogels exhibit improved swelling fatigue property and good biocompatibility, which will further provide a wide range of potential application in the drug delivery.     

Preparation and anisotropic tribological properties of MoAlB/Al laminated composites

The unique microstructure of biomaterials provides inspiration in materials structure design and performance breakthroughs. Here we prepared a MoAlB reinforced Al matrix composites with laminated structure and strong interfacial bonding. This work mainly focuses on the relationship between tribological properties of the MoAlB/Al laminated composites and the MoAlB layer orientation. The results show that the tribological properties of the composites deeply depend on the relation of sliding direction VS. the MoAlB layer orientation, while the dependency gradually decreases with the MoAlB content increasing. The friction coefficient and wear rate of the composites can be decreased by 55.5% and 95.1%, lower than those of pure Al, when 15 vol% MoAlB reinforcement is added. The friction and wear mechanisms of the MoAlB/Al laminated composites are proposed, and the outstanding tribological properties are ascribed to the formation of tribochemical worn film and different stress states caused by the laminated structure.     

Multiferroic properties of (1-x)BCZT-xLCMO laminated composites

The electrical, ferromagnetic and magnetoelectric properties of the (1-x) Ba_0.85Ca_0.15Zr_0.10Ti_0.90O₃-xLa_0.67Ca_0.33MnO₃ [(1-x)BCZT-xLCMO] laminated composites were investigated. The ferroelectric and ferromagnetic characteristics demonstrated that the laminated composites are multiferroic in nature. Our results indicated that the performances of the laminated composites showed strong dependence on the thickness ratio between the ferroelectric BCZT layer and ferromagnetic LCMO layer. Enhanced dielectric properties were obtained for the laminated composites compared with that of the pure BCZT. The piezoelectric coefficient (d₃₃) and coercive electric fields (E_C) of the laminated composites declined with the increasing LCMO nonferroelectric layer, while the saturated magnetization (M_S) increased and the coercive magnetic field (M_C) kept constant. The 0.3BCZT-0.7LCMO composites obtained the largest magnetoelectric coefficient of α_E31 = 1.66 mV/cm·Oe.     

Injection molding of ceramic cutting tools for wood-based materials

In this study a mutable mold for ceramic cutting tools with inserts of different cutting angles and two different injection positions was designed. Three alumina-based ceramic feedstocks with different types and amount of second phases were developed. A mold filling study was carried out for both sprue positions in order to prove the molding behavior of the feedstock and the functionality of the mold. Debindering and sintering of molded green parts was arranged for each composition, respectively. Mechanical properties, microstructure and achieved cutting edge sharpness of produced tools were investigated. Results show that the mold design and injection molding process play a key role in order to manufacture cutting tools of best possible sharpness enabling a wood machining process. Feedstocks exhibit a good mold filling behavior resulting in comparatively sharp cutting edges of ≈10 μm after sintering. Mechanical properties show high potential for application of wood machining cutting tools.     

气辅成型工艺的研究

介绍了气体辅助注射成型技术工艺参数的确定和成型材料的选择原则,讨论了成型过程中出现的主要缺陷及其原因和解决方法。     

Structural design and ablation performance of ZrB2/MoSi2 laminated coating for SiC coated carbon/carbon composites

A protective coating alternated with ZrB₂ and MoSi₂ laminated layers was designed and prepared on carbon/carbon (C/C) composites with SiC inner layer by supersonic atmosphere plasma spraying. After ablated at a heat flux of 2.4 MW/m² for 30s, ZrB₂/MoSi₂ laminated coating was in good condition with a linear growth rate and mass gain rate of 1.67 μm/s and 0.44 mg/s, respectively. From the central region to the border region, the calculated residual thermal stress of ZrB₂/MoSi₂ laminated coating decreased at first and then increased rapidly, illustrating the size change of the generated laminated cracks. The alternate design of ZrB₂ layers for erosion and MoSi₂ layers for oxidation resulted in the laminated stress distribution and improved ablation resistance.     

Synthesis and characterization of new oligomeric/polymeric antistatic additives for sheet molding composites

For various applications it is necessary to lower the specific surface resistivity of polymers in an electrostatically conductive area. To improve the antistatic properties of sheet molding composites (SMC) usually conductive inorganic additives, like carbon black, inorganic salts, metal powder, or CNTs, are mixed physically into the matrix. A newly developed concept for antistatic treatment is using oligomeric/polymeric additives, which are synthesized on the base of ingredients of the used polymeric matrix itself. The received additives are compatible with the matrix. Furthermore, the migration of the additives to the surface is prevented and in the case they exhibit double bonds they are able to be linked in the polymeric network permanently by covalent bonds. So unsaturated, polymer‐based antistatic additives with ionic units were developed for unsaturated polyester resin based SMC. The synthesis was realized by polymer analogous reactions and polycondensation reactions from monomer building blocks with ionic units. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44741.