先进复合材料基体树脂双马来酰亚胺研制概况

本文介绍了国内外作为先进复合材料基体树脂的双马来酰亚胺的技术应用情况，综述了双马来酰亚胺树脂的各种制备方法和改性工艺。     

聚丙烯微孔发泡材料制备及改性进展

聚丙烯(PP)微孔发泡材料具有质轻、力学性能较高的特点,PP基体性质、发泡剂种类、发泡制备成型工艺、化学改性方法、共混及填充改性等方法均可以影响发泡材料的泡孔结构及发泡材料的性能。综述了PP微孔发泡材料的制备成型工艺、化学、共混、纳米、填充等改性方法研究进展,指出采用成本低廉、无毒的化学类发泡剂制备泡孔结构良好的PP微孔发泡材料将是今后研究的热点。PP的交联及接枝改性技术,与其它聚合物、填料共混技术是改善泡孔结构、提高泡沫材料发泡性能和力学性能的途径,研究改性材料与PP基体材料的界面相容性问题也是今后的研究方向。     

中国塑料专利

正专利名称:一种改性环氧树脂/双马来酰亚胺树脂纳米复合材料及其制备工艺申请公布号:CN201410451185.8申请公布日:2016.03.09本发明涉及一种改性环氧树脂/双马来酰亚胺树脂纳米复合材料及其制备工艺。将石墨烯羧基化、酰氯化后,再引入具有特征结构的二元胺或多元胺,然后利用此氨基化的石墨烯与环氧树脂/双马来酰亚胺     

无溶剂双马来酰亚胺树脂的制备与性能研究

采用二元胺、环氧树脂和改性剂A对双马来酰亚胺树脂进行增韧改性,制备出无溶剂型双马来酰亚胺树脂。通过红外光谱和差示扫描量热法等研究了改性树脂的结构、反应程度和耐热性,结果表明该改性树脂的粘度和适用期能够满足湿法缠绕成型工艺要求,且高温下具有很好的反应性,其浇铸体具有较好的力学性能和耐热性。     

改性双马来酰亚胺基体树脂及其复合材料的研究

以二苯甲烷双马来酰亚胺与二烯丙基双酚Ａ为共聚单体，在适当的催化剂等作用下，制备了一种改性双马来酰亚胺树脂。本文对这种改性的双马来酰亚胺树脂体系的溶解性能、固化反应动力学和固化反应机理进行了研究。对这种基体树脂及其玻璃纤维复合材料的力学、电学和耐热性能也进行了考察。     

新型摩阻材料研究——酚醛树脂改性与应用

本文以双马来酰亚胺改性G酚醛树脂、用粉末橡胶作改性树脂的增韧剂,对制备汽车用无纤维新型摩擦材料作了初步研究.红外光谱分析证明:改性过程发生了氢离子移位加成反应,在酚醛链上引入了双马来酰亚胺.热失重分析表明:改性树脂的热分解温度提高54～58℃,明显改善了材料的抗热衰退能力和抗冲击性能.由改性树脂(WR—10)和粉末丁苯橡胶(用量各10%)为基材的摩阻材料,其摩擦系数、抗热衰退能力、耐磨性能和抗冲击强度等,都达到了国家标准要求,是值得继续研究开发的汽车无纤维新型制动材料.     

一种改性双马来酰亚胺共聚树脂体系及其粘接性能的研究

以二苯甲烷双马来酰亚胺和二烯丙基双酚A为共聚单体，在适当的催化剂等作用下，制备了一种改性双马来酰亚胺共聚树脂。本文对这种改性的双马来酰亚胺共聚树脂的溶解性能、固化反应动力学和固化机理进行了讨论；对体系固化物的机电热性能及其胶粘剂的高低温粘接性能也进行了研究。     

一种含硅松香酸酯及其制备方法

[公开号] 1576338 本发明的特征是以松香、二元醇及二氯硅烷为原料，制备出一种全新的含硅松香酸酯，拓宽了松香的应用范围，提高了松香的附加值，将其应用于双马来酰亚胺的改性，不但可以丰富双马来酰亚胺树脂的品种，而且提高了双马来酰亚胺树脂的性能。     

改性双马来酰亚胺树脂耐温性的研究

将二烯丙基双酚A、邻苯二甲酸二烯丙酯、环氧树脂、苯氧基树脂按照不同比例添加到双马来酰亚胺树脂体系中,制备改性双马来酰亚胺树脂样条。通过动态热力学分析仪测试改性双马来酰亚胺树脂的玻璃化转变温度。测试结果表明配方a的玻璃化转变温度最高,耐温性最好。     

热塑性聚酰亚胺微孔材料及制备工艺

本发明涉及一种微孔聚合物材料制备技术领域，尤其涉及一种热塑性聚酰亚胺微孔材料及其制备工艺。其制备原料的组成为：70％-95％的热塑性聚酰亚胺和5％-30％的造孔剂。采用粉末烧结的方法将湿法混合的聚酰亚胺和固体造孔剂制备成微孔材料，工艺流程简单，成本低。经多阶段恒温烧结使得造孔剂完全分解并与聚酰亚胺粒子良好粘结，有效提高了材料的强度和孔隙率；控制造孔剂用量可以调节微孔材料的性能，易于调节孔径和孔隙率。     

Advanced structures in electrodeposited tin base anodes for lithium ion batteries

A novel composite anode material consisted of electrodeposited Sn dispersing in a conductive micro-porous carbon membrane, which was directly coated on Cu current collector, was investigated. The composite material was prepared by: (1) casting a polyacrylonitrile (PAN)/dimethylformamide (DMF) solution that contained silica particles on a copper foil, (2) removing the solvent by evaporation, (3) dissolving the silica particles by immersing the copper foil into an alkaline solution, (4) drying the copper foil coated by micro-porous membrane, (5) electrodepositing Sn onto the copper foil through the micro-pores in the micro-porous membrane, and (6) annealing as-obtained composite material. This method provided the composite material with high decentralization of Sn and supporting medium purpose of conductive carbon membrane deriving from pyrolysis of PAN. SEM, XRD and EDS analysis confirmed this structure. The characteristic structure was beneficial to inhibit the aggregation between Sn micro-particles, to relax the volume expansion during cycling, and to improve the cycleability of electrode. Galvanostatic tests indicated the discharge capacity of the composite material remained over 550 mAh g⁻¹ and 71.4% of charge retention after 30 cycles, while that of the electrode prepared by electrodepositing Sn on a bare Cu foil decreased seriously to 82.5 mAh g⁻¹ and 13%. These results show that the composite material is a promising anode material with larger specific capacity and long cycle life for lithium ion batteries.     

Comparison of the effects of different retention appliances on the oxidant–antioxidant system

The aim was to compare oxidative stress (OS) levels with different types of retention appliance. Thirty orthodontic patients were divided into three groups: Group 1 (Essix retainer), Group 2 (lingual retainer with stainless steel retainer wire), and Group 3 (lingual retainer with fiber-reinforced material). OS was assessed in the subjects’ saliva. Saliva samples were taken from the patients at T₀ (before using the retention appliance), T₁ (first month of retention), and T₂ (third month of retention). The specimens were investigated to detect changes in total antioxidant status (TAS), total oxidant status (TOS), and oxidative stress index (OSI). TAS values in Group 2 were significantly higher than in Group 3. TOS values in Group 3 were significantly lower than in the other groups. TOS values in Group 2 were lower than in Group 1. OSI values of Group 1 were higher than those in Group 2 or 3. There was no statistically significant difference among the time periods. The type of retention appliance affected OS values. A fiber-reinforced material may have a lower OSI. OS or products can affect some systemic disease; therefore, the selection of the retainer will be important on these patients.     

水过滤净化用微孔陶瓷材料的制备

对水处理过程中用作过滤材料的微孔陶瓷制备方法进行了评述,指出成孔技术和成型方法是制备工艺的关键,提出了比较有前途的制备微孔陶瓷的新原料及相应的制备方法。     

微孔陶瓷材料在饮用水净化处理中的应用

从微孔陶瓷的结构特性出发，分析了微孔陶瓷作为过滤介质在水处理除杂净化过程中的过滤机理，论述了微孔陶瓷在饮用水净化处理中的应用。     

微孔注气式旋流器实用性研究

为了解决我国大部分油田三次采油污水处理难的问题,开发了微孔注气式旋流器,它是旋流分离技术与气浮选技术的巧妙结合.通过试验研究,验证了采用注气的方式可大幅度提高旋流器的分离效率,提高幅度在10％～20％,效率最高值可达95.9％.且微孔注气式旋流器的分流比、气液体积比、入口流量等适用范围都较宽.这为微孔注气式旋流器的现场...     

碳分子筛吸附氯气的性能研究

采用P-C-T氯气吸附装置对碳分子筛的氯气吸附性能进行了研究.结果表明,碳分子筛可反复多次吸附氯气,并且结构骨架依然存在,稳定性较好.在273℃、0.332 MPa下,氯气吸附质量分数可达35.92％.     

悬浮载体对不同曝气器氧转移特性的影响研究

以中试装置为研究对象,对比曝气器形式、通气量和悬浮载体填充率对曝气设备氧转移特性的影响。结果表明,微孔曝气器标准氧总转移系数(KLas)高于大孔曝气器;微孔与大孔曝气器的KLas随通气量的增加而提高,悬浮载体的增加有助于提高微孔曝气器的KLas,也可显著提高大孔曝气器的KLas。随着通气量增加或载体填充率的增大,微孔曝气器比标准氧转移效率(SSOTE)增大,优化通气量和填充率分别为≤40 m^3/h和≤40%;大孔曝气器的SSOTE显著增加,优化填充率为40%。随着通气量增加,微孔曝气器理论动力效率(Ep)保持不变或降低,且其通气量应≤32 m^3/h;而大孔曝气器Ep显著增加;二者优化填充率均为<40%。     

Paclitaxel release from micro-porous PLGA disks

Micro-porous biodegradable polymeric foams have potential applications in tissue engineering and drug delivery systems. A two-stage fabrication process combining spray drying and supercritical gas foaming is presented for the encapsulation of paclitaxel in micro-porous PLGA (poly lactic glycolic acid) foams. Encapsulation of paclitaxel in the PLGA polymer matrix was achieved and these foams have potential application as a new type of surgical implant for controlled release of paclitaxel. This technique may also be applied to other hydrophobic drugs which face problems of slow release when encapsulated in a compact polymeric device. The micro-porous structure helps to increase drug release rate due to a shorter diffusion path of the drug in the polymer. The final residual organic solvent content in the polymer was low and well within safety limits due to the high miscibility of supercritical CO₂ with the organic solvent. The pore size distribution, the phase behavior, and the in vitro swelling behavior of the foams were characterized. In vitro release results showed a nearly constant release rate for up to 8 weeks. The release profiles from micro-porous foam and from compressed disks were compared to assess the performance of micro-porous foams as sustained release implants. The foams implanted intracranially in mice showed therapeutic concentrations of paclitaxel at distant regions of the brain even after 28 days of implantation.     

微孔陶瓷材料在水处理中的应用

本文从微孔陶瓷的结构特性出发，分析了微孔陶瓷作为过滤介质在水处理除杂净化过程中的过滤机理，论述了微孔陶瓷在饮用水净化处理和某些工业废水、生活污水处理中的应用。     

微孔膜法油水分离——表面性质及微观结构的研究进展

石油炼制和化工过程存在大量油水混合物体系,影响生产过程稳定性,也会造成环境污染,亟需高效低成本的油水分离技术。与气浮、离心、化学混凝等传统油水分离技术相比,微孔膜技术通过油或水的选择性渗透实现分离,具有操作简单、分离效率高、运行成本低等众多优点。然而,微孔膜处理油水混合物的分离效率和加工能力同时取决于膜材料的表面性质（表面浸润性能）和微孔结构（分离通道的尺寸效应）。本文首先基于表面润湿现象和尺寸筛分机制介绍了膜法油水分离的原理,然后从上述两个角度出发综述了近年来微孔膜法油水分离的相关研究进展,最后指出微孔膜法油水分离在迈向工业化应用的过程中还需解决的一些问题,并对未来膜材料表面性质和微孔结构的研究进行了展望。