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284篇 您的检索式:作者名="Siddiq"
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1A Review Featuring Fabrication, Properties and Applications of Carbon Nanotubes(CNTs) Reinforced Polymer and Epoxy Nanocomposites显示文摘Carbon nanotubes(CNTs) have long been recognized as the stiffest and strongest man-made material known to date. In addition, their high electrical conductivity has roused interest in the areas of electrical appliances and communication related applications. However, due to their miniature size, the excellent properties of these nanostructures can only be exploited if they are homogeneously embedded into light-weight matrices as those offered by a whole series of engineering polymers. In order to enhance their chemical affinity to engineering polymer matrices, chemical modification of the graphitic sidewalls and tips is necessary. The mechanical and electrical properties to date of a whole range of nanocomposites of various carbon nanotube contents are also reviewed in this attempt to facilitate progress in this emerging area. Recently, carbonaceous nano-fillers such as graphene and carbon nanotubes(CNTs) play a promising role due to their better structural and functional properties and broad range of applications in every field. Since CNTs usually form stabilized bundles due to van der Waals interactions, they are extremely difficult to disperse and align in a polymer matrix. The biggest issues in the preparation of CNTs reinforced composites reside in efficient dispersion of CNTs into a polymer matrix, the assessment of the dispersion, and the alignment and control of the CNTs in the matrix. An overview of various CNT functionalization methods is given. In particular, CNT functionalization using click chemistry and the preparation of CNT composites employing hyperbranched polymers are stressed as potential techniques to achieve good CNT dispersion. In addition, discussions on mechanical, thermal, electrical, electrochemical and applications of polymer/CNT composites are also included.Sobia Imtiaz Muhammad Siddiq Ayesha Kausar Sedra Tul Muntha Jaweria Ambreen Iram Bibi 2018Chinese Journal of Polymer Science2018,36,4:11
2Thermal, Mechanical and Electrical Studies of Novel Shape Memory Polyurethane/Polyaniline Blends显示文摘Shape memory polymer(SMP) blends based on polyurethane(PU) and polyaniline(PANI) were prepared via chemical in situ polymerization process. The thermal, mechanical, electrical and shape memory properties were investigated. The structural characterization and morphology of the polymer blends were inspected by Fourier transform infrared(FTIR) and scanning electron microscopy(SEM), respectively. The 1 wt% of PANI loading enhanced the thermal stability of the system up to 339 °C. According to differential scanning calorimetry(DSC), the glass transition temperature(Tg) and melting temperature(Tm) of PU/PANI blends increased with the polyaniline loading(0.1 wt%-1 wt%). Improved mechanical properties such as tensile strength and Young's modulus of PU matrix were also observed with PANI. Moreover, the electrical conductivity of PU/PANI blends was also found to be a function of PANI loading. Remarkable recoverability of thermally triggered shape memory(SM) behavior to the extent of 96% was achieved for 1 wt% PANI blend.Rabia Sattar Ayesha Kausar Muhammad Siddiq 2015Chinese Journal of Polymer Science2015,33,9:5
3Temperature Dependence of Chain Conformation and Local Rigidity of Isomerized Polyimides in Dimethyl Formamide显示文摘LIU Gui-hua QIU Xue-peng SIDDIQ Mohammad BO Shu-qin JI Xiang-ling 2013Chemical Research in Chinese Universities2013,29,5:4
4Cobalt and sulfur co-doped nano-size TiO_2 for photodegradation of various dyes and phenol显示文摘Various compositions of cobalt and sulfur co-doped titania nano-photocatalyst are synthesized via sol–gel method. A number of techniques including X-ray diffraction(XRD), ultraviolet–visible(UV–Vis), Rutherford backscattering spectrometry(RBS), thermal gravimetric analysis(TGA)Raman, N2 sorption, electron microscopy are used to examine composition, crystalline phase, morphology, distribution of dopants, surface area and optical properties o synthesized materials. The synthesized materials consisted of quasispherical nanoparticles of anatase phase exhibiting a high surface area and homogeneous distribution o dopants. Cobalt and sulfur co-doped titania demonstrated remarkable structural and optical properties leading to an efficient photocatalytic activity for degradation of dyes and phenol under visible light irradiations. Moreover, the effect of dye concentration catalyst dose and p H on photodegradation behavior of environmental pollutants and recyclability of the catalyst is also examined to optimize the activity of nano-photocatalys and gain a better understanding of the process.Asima Siddiqa Dilshad Masih Dalaver Anjum Muhammad Siddiq 2015Journal of Environmental Sciences2015,27,11:3
5Microstructural Analysis of Ultrasonic Welded AA6061 by Electron Backscattered Diffraction显示文摘Ultrasonic welding can be used to join plastic and metal through high-frequency (more than 20 kHz) acoustic vibrations. Aluminium alloy is widely used in electronics, automotive and aerospace. The mechanical vibrations used during ultrasonic metal welding are introduced horizontally. During ultrasonic metal welding, a complex process is triggered involving static forces, oscillating shearing forces and a moderate temperature increase in the welding area. As the energy is introduced to the weld zone, there are three important phenomena occurring which are surface effect, volume effect and thermal effect. As it is known, microstructure is directly linked to the mechanical properties including fatigue resistance, fatigue life and fracture strength. So the microstructure analysis is important to evaluate the ultrasonically welded aluminium alloy’s properties. Also, mechanical properties of metal sheets, such as plastic anisotropy and formability, can be improved by a proper crystallographic texture control. That means the texture has great influence on the plastic anisotropy of the final recrystallized sheets. Optical microscopy (OM) can be used for showing the grain size and grain shape. However, to examine the relationship between mechanical behaviour and microstructure of the weldment, optical microscopy(OM) is not sufficient. OM cannot delineate a grain structure in the weld zone. The etched surface exhibited granularity at the micron level, but it was not clear if that reflected the grain structure. Electron backscatter diffraction (EBSD) in an SEM has become the most widely used technique for determination of microtexture. In this research, high-resolution electron backscatter diffraction is used to study the effects of the vibration on the evolution of microstructure in AA6061. The orientation image maps (OIM), polar figures (PF), and orientation distribution functions (ODF) of the samples are obtained. The characteristics of the crystallographic orientation, the grain structure and the grain boundary are analysed to find the effect of ultrasonic vibration on the microstructure and texture of the bond. The ultrasonic vibration will lead to exceptional refinement of grains to a micron level along the bond area and affect the crystallographic orientation. The grain size of upper foil is much smaller than that of the lower foil. And ultrasonic vibration results in a very weak texture with some characteristic intensity of a rotated cube-orientation and the Brass-orientation and S-orientation. In the lower foil, there is no much influence of the ultrasonic vibration. So there is very strong cube orientation in the lower foil.Zhu Z Wynne B P Ghassemieh E Siddiq A 2009稀有金属材料与工程2009,38,A03:2
6Characterizing associations and SNP-environment interactions for GWAS-identified prostate cancer risk markers-results from BPC3显示文摘LINDSTROM S SCHUMACHER F SIDDIQ A 2011PLoS One2011,6,17:1
7Adiponectin gene polymorphisms and adiponectin levels are independently associated with the development of hyperglycemia during a 3-year period: the epidemiologic data on the insulin resistance syndrome prospective study 显示文摘Fumeron F Aubert R Siddiq A 2004Diabetes2004,53,4:1
8Inter simple se- quence repeat (ISSR) polymorphism and its application in plant breeding显示文摘Pradeep Reddy M Sarla N Siddiq E A 2002Euphytica2002,128,:1
9Spinal and paraspinal pneumococcal infections-a review 显示文摘Siddiq DM Musher DM Daroniche RO 2014Eur J Clin Microbiol Infect Dis2014,33,4:1
10A synonymous coding polymorphism in the alpha2-Heremans-schmid glycoprotein gene is associated with type 2 diabetes in French Caucasians显示文摘Siddiq A Lepretre F Hercberg S 2005Diabetes2005,54,8:1
11Inter simple sequence repeat (ISSR) polymorphism and its application in plant breeding显示文摘Reddy M P Sarla N Siddiq E A 2002Euphytica2002,128,1:1
12The cytokine interleukin-6 is sufficient but not necessary to mimic the peripheral conditioning lesion effect on axonal growth显示文摘Cao Z Gao Y Bryson JB Hou J Chaudhry N Siddiq M 2006J Neurosci2006,26,20:1
13Poly(vinyl alcohol)/GO-MMT Nanocomposites: Preparation, Structure and Properties显示文摘A facile, efficient and environment friendly method is established to prepare poly(vinyl alcohol)(PVA) based graphene oxide-montmorillonite(GO-MMT) nanocomposites in aqueous media. GO-MMT nanohybrid is obtained by the combination of GO and MMT in water without any reducing or stabilizing agents. The formation of GO-MMT nanohybrid is due to the hydrogen bonding and crosslinking effects. The sodium ions within MMT sheets act as crosslinkers between GO sheets and MMT platelets. The resultant nanocomposites are characterized by means of X-ray diffraction(XRD), scanning electron microscopy(SEM), differential scanning calorimetry(DSC), thermogravimetric analysis(TGA) and mechanical testing. Compared to that of pure PVA, PVA nanocomposites show enhanced thermal stabilities and mechanical properties, which results from strong interfacial adhesion of the nanoadditives in PVA matrix. The further increase in the tensile strength and modulus results from strong interaction between PVA chains and layered GO-MMT as well as good mechanical properties of GO-MMT hybrid, compared to PVA/GO and PVA/MMT nanocompsoites.Muhammad Raheel Kun Yao Jiang Gong 陈学成 Dong-tao Liu Yi-chao Lin Dong-mei Cui Muhammad Siddiq 唐涛 2015Chinese Journal of Polymer Science2015,33,2:1
14Adiponectin genepoly- morphisms and adiponectin levels are independently associat- ed with the development of hyperglycemia durina 3-year peri- od:the epidemiologic data on the insulin resistance syndrome prospective study 显示文摘Fumeron F Aubert R Siddiq A 2004Diabetes2004,53,4:1
15Inter simple sequence repeat(ISSR) polymorphism and its application in plant breeding 显示文摘Reddy M P Sarla N Siddiq E A 2002Euphytica2002,128,1:1
16Comparative effects of metformin and pioglitazone on lipid profile of rabbits显示文摘Khan RA Baig SG Siddiq A 2015Pak J Pharm Sci2015,28,2:1
17Thermomechanical analyses of ultrasonic welding process using thermal and acoustic softening effects显示文摘Siddiq A Ghassemieh E 2008Mechanics of Materials2008,40,12:1
18Inter simple sequence repeat( IS- SR) polymorphism and its application in plant breeding显示文摘Reddy M P Sarla N Siddiq E A 2002Eu- phytica2002,128,1:1
19A rapid technique for scent determi nation in rice显示文摘Sood B G Siddiq E A 1978Plant Breed1978,38,:1
20A synonymous coding polymorphism in the alpha 2-Heremans-Schmid glycoprotein gene is associated with type 2 diabetes in French Caucasians显示文摘Siddiq A Lepretre F Hereberg S 0,,08:1
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