化学镀镍PAN纤维复合材料及导电性研究

对聚丙烯腈纤维化学镀镍后与ＨＩＰＳ树脂共混制备出导电复合材料的镀层结构、电阻率和导电性进行了研究，并对材料导电性与导电性填普量、混炼时间及偶联剂的加入等进行了探讨。     

铜石墨复合材料改性研究进展

综述了铜石墨复合材料在改性方面进行的界面、添加剂和纤维增强等方面的研究.研究认为,界面改性、添加剂及纤维特别是纳米碳管等能显著提高铜石墨复合材料导电性能及摩擦磨损性能.     

PAN／Ni—P纤维和碳黑填充的HIPS复合材料的导电性

研究经化学镀镍的聚丙烯腈导电纤维填充的高抗冲聚苯乙烯复合材料的导电性与导电填料浓度的导电性与导电填料浓度的关系及加入有机钛酸酯偶联剂的影响，为了进一步提高复合材料的导电性，在ＰＡＮ／Ｎｉ－Ｐ纤维填充的复合材料中又加入不同量的碳黑，由于碳黑粒子的加入改善了纤维间的接触状态，更有利于导电网络的形成，从而大大提高了复合材料的导电能力。     

化学改性对PAN原丝及预氧纤维结构性能的影响

在各种温度和时间条件下，将本实验室纺的KPAN原丝进行连续化学改性处理，借助IR光谱、DSC、TG、X射线衍射等分析方法，选出了最佳的改性温度和改性时间，并对化学改性的原丝、预氧丝的性能进行了初步探讨。得出结论：化学改性能缩短预氧环化时间，缓解纤维的放热和吸热，优质原丝应具有高纯度、高强度、高取向度性质。本课题希望通过对原丝进行化学改性的方法，获取具有在商业上有广泛应用前景的预氧化纤维和炭纤维。     

PAN纳米纤维的改性及其应用于吸附金属离子

用盐酸羟胺溶液对静电纺聚丙烯腈(PAN)纳米纤维进行化学改性,制得偕胺肟PAN(AOPAN)纳米纤维,并用作吸附金属离子的基材。用SEM、FT-IR对化学改性前后PAN纳米纤维的表面形貌及分子结构进行表征。采用原子吸收分光光度计(AAS)测试溶液中金属离子的浓度,以此研究AOPAN纳米纤维对铜和铁金属离子的吸附性能。结果表明,AOPAN纳米纤维对Fe3+、Cu2+的饱和吸附量分别为206.36mg/g和118.38mg/g,且其吸附过程非常符合Langmuir吸附等温模型。此外,在1mol/L的硝酸溶液中反应60min后,Fe3+、Cu2+的洗脱率分别达到了90.6%和86%。     

改善导电性复合材料的物理性能与包装材料的选择

改善导电性复合材料的物理性能与包装材料的选择章湘平在商品的包装、运输、装卸与贮藏过程中，塑料（特别是薄膜制品）、合成纤维织品的包装和包装之间、包装与内容物之间，会因摩擦及叠合等因素产生静电，有可能引起数十伏甚至数万伏的电压，这将带来一系列的危害，如粉...     

聚丙烯酸酯/有机锂盐胶乳膜的离子导电性

合成了以十二烷在磺酸锂为乳化剂的聚丙烯酸乙酯乳液，对乳液聚合和溶液聚合所得的ＰＥＡ／ＤＳＬｉ膜的离子导电性能作了比较，考察了电解液含量，种类，浓度及温度对电导率的影响。     

超高导电性石墨烯铜复合材料研究进展

超高导电铜具体是指常温下电导率高于100％IACS的铜基复合材料.在铜基复合材料中增强体的选择会对复合材料的电导率产生重大影响.近年来,随着对碳纳米管和石墨烯的进一步研究,具有良好本征特性的碳纳米材料逐渐成为了当下研究的热门.对于铜基复合材料而言,纳米碳具有作为增强体的巨大潜力,成为主要研究开发的材料,近年来随着科技社...     

混合填料与改善导电性复合材料的物理性能

本文从对导电性复合材料的基本要求出发，以碳纤维镍粉组成混合填料加入低密度聚乙烯中为例，研究了复合材料物理性能的变化规律，提出了按不同比例填料材料特性来合理选择包装材料的看法。     

新型导电性苯胺共聚物及其与碳纳米管的复合材料的制备与表征

实验采用单体5-氨基邻苯二甲酸（AIA）与苯胺（aniline）单体通过氧化聚合法共聚合成新型的aniline／AIA共聚物及其与碳纳米管（CNT）组成的复合材料。红外光谱和拉曼尔光谱研究表明，共聚物具有与聚苯胺类似的化学结构，但AIA的加入可以提高共聚物中醌环的相对含量，有助于提高导电性。碳纳米管也能促进醌环的形成，可与AIA协同提高材料导电性。     

新型包装材料CFP的研制

论述新型包装材料ＣＦＰ的研制原理、生产工艺、技术性能及特点，介绍ＣＦＰ与其它复合材料的性能比较及其应用范围。     

The unusual electrical response in polyaniline-threonine composites

Polymer-amino acid composites are a new class of polymer materials with unusual electrical property. Novel polyaniline-threonine composites combining the synthesized polyaniline and proteinogenic amino acid threonine have been prepared. The samples were characterized by Fourier-transform infrared spectra, UV-vis absorption spectra and atomic force microscopy. The unusual electrical response was found from the d.c. conductivity measurement. The carboxyl group of the amino acid threonine played an important role in the electrical conductivity. Analysis of d.c. conductivity data revealed that in the temperature range of 300 K-200 K, the d.c. conductivity was governed by Mott's 3-dimensional variable range hopping.     

A model of composite laminated Reddy plate based on new modified couple stress theory

Based on new modified couple stress theory a model for composite laminated Reddy plate is developed in first time. In this theory a new curvature tensor is defined for establishing the constitutive relations of laminated plate. The characterization of anisotropy is incorporated into higher-order laminated plate theories based on the modified couple stress theory by Yang et al. in 2002. The form of new curvature tensor is asymmetric, however it can result in same as the symmetric curvature tensor in the isotropic elasticity. The present model of thick plate can be viewed as a simplified couple stress theory in engineering mechanics. Moreover, a more simplified model for cross-ply composite laminated Reddy plate of couple stress theory with one material’s length constant is used to demonstrate the scale effects. Numerical results show that the present plate model can capture the scale effects of microstructure. Additionally, the present model of thick plate model can be degenerated to the model of composite cross-ply laminated Kirchhoff plate and Mindlin plate of couple stress theory.     

子波变换在复合材料冲击损伤实时检测中的应用

鉴于传统信号处理对非平稳信号的局限，本文分析了子波变换下奇异信号和白噪声在多尺度空间中模极大值传播特性。对复合材料所受冲击信号进行处理，提出一种对相似信号进行归类的方法，该方法能实时有效地从冲击信号中提取冲击的大小及位置信息，并对复合材料冲击损伤准确定位。     

A modified couple stress model for bending analysis of composite laminated beams with first order shear deformation

Based on a modified couple stress theory, a model for composite laminated beam with first order shear deformation is developed. The characteristics of the theory are the use of rotation–displacement as dependent variable and the use of only one constant to describe the material’s micro-structural characteristics. The present model of beam can be viewed as a simplified couple stress theory in engineering mechanics. An example as a cross-ply simply supported beam subjected to cylindrical bending loads of f_w = q₀ sin (πx/L) is adopted and explicit expression of analysis solution is obtained. Numerical results show that the present beam model can capture the scale effects of microstructure, and the deflections and stresses of the present model of couple stress beam are smaller than that by the classical beam mode. Additionally, the present model can be reduced to the classical composite laminated Timoshenko beam model, Isotropic Timoshenko beam model of couple stress theory, classical isotropic Timoshenko beam, composite laminated Bernoulli–Euler beam model of couple stress theory and isotropic Bernoulli–Euler beam of couple stress theory.     

包装废PE改性沥青的研究

利用包装废弃物(PE)对沥青进行改性,提高沥青综合性能,同时解决了包装废PE回收利用和沥青性能达不到实际应用要求的问题,试验测得沥青的软化点提高;延伸度、降低针入度,并针对试验结果进行理论分析,研究聚合物(PE)改性机理,有极强的现实意义.     

材料能量学的结构

提出材料学中的两个基本关系式：Ｐ＝ｆ（ｅ,Ｓ）和Ｓ＝｛Ｅ,Ｒ｝,式中,Ｐ,ｅ,Ｓ,Ｅ及Ｒ分别是性能,环境,结构,组元的集合及关系的集合。微观材料学的功能（Ｐ）取决于它的结构（Ｓ）,第一节讨论它的五组元（性能,环境,结构,过程及能量）之间的关系（Ｒ）;第二节讨论材料能量学中九组元之间的关系（Ｒ）;第三节列出材料能量学九组元（Ｅ）的内涵和警句;第四节总结能量在材料学中的作用。     

开发果蔬保鲜包装材料

从自然气调包装（MAP）技术原理的介绍出发，分析了果蔬食品包装的技术关键。根据影响包装薄膜材料渗透系数的各种因素的讨论和某些数学模型的启示，可以看出提高和发展这种包装技术的最重要的关键在于能开发和研制出具有保鲜功能的包装材料。     

The Effect of Formulation on Radioiodide Thyroid Uptake in the Hyperthyroid Cat

This investigation was designed to compare in vitro dissolution profiles from sodium iodide capsules with radioiodide thyroid uptake in hyperthyroid cats using sodium iodide capsules prepared with a formulation exhibiting a complete release of radioiodide (I-123) in vitro and a formulation with an incomplete release of radioiodide. In vitro dissolution profiles for I-123 sodium iodide capsules with two different formulations were determined using the USP XXIII dissolution test. The two formulations studied in vitro were sodium phosphate dibasic powder with 1% magnesium stearate and calcium phosphate dibasic powder with 3% magnesium stearate. By 20 min after initiation of the dissolution test, over 95% of the I-123 was released from capsules of sodium phosphate dibasic powder. The capsules of calcium phosphate dibasic powder reached 75% at 65 min, with no further release occurring thereafter. There was a statistically significant difference in the dissolution profiles of the two formulations. The thyroid uptake of I-123 from capsules exhibiting complete release and incomplete release of radioiodide was determined in hyperthyroid cats. At 4 hr, the mean percentage thyroid uptake value for sodium phosphate dibasic powder with 1% magnesium stearate (complete release formulation) was 12.0% compared to 9.4% for calcium phosphate dibasic powder with 3% magnesium stearate (incomplete release formulation); at 24 hr, the values were 34.4% compared to 23.7%. The data suggest that the incomplete dissolution profile observed in vitro may correlate with a reduction in the bioavailability of the radioiodide in vivo. However, using the Wilcoxon signed rank test, statistically significant differences did not occur between the complete release formulation and incomplete release formulation at either 4 hr or 24 hr (p >. 05). The results of the in vivo study with five hyperthyroid cats were not conclusive due to the variability in response between individual cats.