聚酮酸和聚醌的合成与表征

以均苯四甲酸酐、二苯醚为原料，以１，２－二氯乙烷为溶剂，无水三氯化铝为催化剂，在吡啶存在下，通过低温傅－克亲电反应合成了具有梯形结构的聚酮酸和聚醌，考察了溶剂体系对反应的影响 不同温度下聚酮酸的热关环，用ＩＲ、ＴＧ等方法对其进行了表征，研究表明它们具有优良和耐热性和耐溶剂性。

聚异氰氨酸酯唑烷酮的高应变动态响应研究

通过基本力学性能测试和Kolsky杆(SHPB)方法,测试聚异氰氨酸脂唑烷酮(POZD)在高应变率下的非线性力学行为。结果表明,防爆新材料POZD应力应变关系能够较好地用Mooney-Rivlin模型来表示,该模型采用左柯西张量不变量表示的应变能函数来描述POZD材料的力学响应特性,以便对其防爆性能进行进一步设计和优化。

Convenient synthesis of silver nanoplates with adjustable size through seed mediated growth approach

Silver nanoplates,with average thickness about 5 nm and average tunable size from 40 to 500 nm,were synthesized via a simple room-temperature solution-phase chemical reduction method in the presence of appropriate concentration of trisodium citrate and silver seeds.The optical in-plane dipole plasmon resonance bands of these silver plates could be tuned from 520 to 1100 nm.Control experiments were explored for understanding of the growth mechanism.It is found that both the amount of citrate ions and the small silver seeds added to the growth solution are the key to controlling the silver nanoplates without changing their thickness and crystal structure.Small silver seeds are found to play an important role in the formation of large thin silver nanoplates when poly（vinylpyrrolidone）（PVP） are used as capping agent.

Sorption of Pyruvic Acid with Weakly Basic Polymer Sorbents

Uptakes of pyruvic acid for two types of commercially available weakly basic polymer sorbents, D301G and D301R, have been measured over a wide pH range and at various salinities of MgSO4. The results show that the overloading adsorption of pyruvic acid occurs on both weakly basic polymer sorbents, and the overloading models can predict the experimental data of uptake very well. The overloading value for D301G is larger than that for D301R. The adsorption isotherm of pyruvic acid for both polymeric sorbents is greatly affected by the solution pH and MgSO4 concentration in the aqueous phase, and a high recovery efficiency of pyruvic acid from aqueous solution can be obtained at the solution pH around 2.

Preparation and Properties of Tung Oil-Based Polyurethane

Tung oil-based polyols were synthesized by the esterification and transesterification between Tung oilbased anhydride and butanediol. The hydroxyl values of the polyols prepared were tested and discussed. Polyurethane was prepared by using Tung oil-based polyols and/or poly(propylene glycol) as polyols and by using isophorone diisocyanate as isocyanate. The effect of the ratio of Tung oil-based polyols to poly(propylene glycol) on the properties of polyurethane prepared was investigated by the water resistance, alcohol resistance and hardness tests. The results show that Tung oil-based polyols are effective to improve the hardness, water resistance and alcohol resistance of polyurethane.

PREPARATION AND CHARACTERIZATION OF DOXORUBICIN-LOADED MAGNETIC ANTICANCER NANOPARTICLES

Doxorubicin（ADM）-loaded magnetic anticancer nanoparticles, using Fe3O4 as core, doxorubicin as model drug and polyvinylpyrrolidone （PVP） as matrix, were prepared by inverse emulsion polymerization. The experimental results showed that the average diameter of Fe3O4 particles was 19.8nm. The X-ray diffraction itzdicated that the prepared Fe3O4 particle was pure cubic Fe3O4, The results obtained by SEM showed the magnetic nanoparticles under optimal operating condition had a smooth spherical surface, LLS showed an average size of 78. 7nm. And IR results demonstrated that they consisted of ADM, PVP and Fe3O4.

Synthesis of Silver Nanoparticle and Its Morphological Control

Silver nanoparticles with different morphologies were prepared in AgNO3 aqueous solution using nanocarbon as template medium and polymer surfactant as protecting agent in an ultrasonic field.The polymer surfactant polyvinylpyrrolidone(PVP)was self-prepared and used directly in aqueous solution form.The molecular weight of PVP was measured by viscosimeter.The crystalline phase,component,size,and morphology of the as-synthesized silver naoparticles were characterized by XRD,TEM,FTIR,and Laser Granularity Instrument.The results indicated that ultrasonic was the key factor to deoxidize Ag+ to be Ago,nanocarbon and polymer surfactants accelerated the deoxidization reaction course and controlled the agglomeration of freshly formed silver nanoparticles,the category of polymer surfactant had decisive effect on the morphology of as-synthesized nanoparticle.Well-defined dendrites silver nanoparticle could be attained when choosing PVP as surfactant in AgNO3 aqueous solution,while regular sphere silver nanoparticle could be synthesized in the presence of polyvinyl alcohol(PVA)surfactant.Moreover,the concentration of AgNO3 and ultrasonic action time also had obvious effect on the morphology of silver nanoparticle,low concentration of AgNO3 and long time of ultrasonic were not in favor of forming dendrite silver.

Influence of surfactants on the morphology and photocatalytic activity of Bi_2WO_6 by hydrothermal synthesis

The flower-like microsphere Bi2WO6 with an average diameter of 2.5 μm is synthesized by a simple hydrothermal method in the presence of surfactant sodium dodecyl sulfate （SDS） or polyvinylpyrrolidone （PVP）. The crystalline phase, compositions, morphology, microstructure, surface area and band gap energy of the Bi2WO6 are characterized by X-ray diffraction, X-ray energy-dispersive spectrum, scanning electron microscopy, transmission electron microscopy and absorption spectra. It is found that surfactant has a significant influence on the microstructure and properties of the samples. The surfaetant SDS en- hances the surface area and photocatalytic activity of Bi2WO6, while the surfactant PVP has an opposite effect. Under Xe lamp irradiation, the Bi2WO6 sample prepared in the presence of SDS can degrade dye Rhodamine B （RhB） effectively.