Abstract:A series of monodispersed polyaminopropylmethylsilsesquioxane (PAMSQ) nanospheres were fabricated via emulsion polymerization of Methyl triethoxysilane (MTES) in aqueous solution and sodium hydroxyl was used as catalyst, γ-aminopropyl triethoxysilane (KH550) as a modifier, sodium dodecyl sulfonate/fatty alcohol-polyoxyethylene ether (SDS/AEO-9) as mixed emulsifiers. Structure, thermal stability, particl size distribution, microscopic morphology of PAMSQ were investigated by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Thermogravimetric analyzer (TGA), Dynamic Light Scattering (DLS), Field emission scanning electron microscopy (FESEM) and Atomic force microscopy (AFM). Results indicate that a series of PAMSQ nanospheres with an average particle size of about 30~150 nm could be prepared while the doses of NaOH were controlled as 0.018~0.08 wt%. Meanwhile the average particle size of the monodispersely and regularly spherical PAMSQ increased with augment of the NaOH dose. PAMSQ possessed the favorable thermal stability.

Abstract:In this article, a bifunctional polymer (PEG-NHCH2COOH) with amino group and carboxyl group was synthesized by nucleophilic substitution of methoxy polyethylene glycol tosylate (PEG-OTs) and methyl N-acetylglycinate, and hydrolysis reaction. Next, the hydrophobic fluorescent dye borondipyrromethene (BODIPY) was conjugated with the bifunctional polymer (PEG-NHCH2COOH) by C-N covalent bonds resulting a new fluorescent polyethylene glycol amino acid derivative (B-BODIPY). After, B-BODIPY was coordinated with the Mn(II) ion, multifunctional borondipyrromethene polyethylene glycol manganese(II) nano-particles (G2MnNPs) was formed through microemulsion self-assembly method. The nano-particles (G2MnNPs) were characterized by infrared spectroscopy (FT-IR), UV-vis and TEM testing methods. Cell imaging and mitochondria imaging experiments showed that the G2MnNPs was a low toxic multifunctional tumor imaging agent including mitochondrial targeting, fluorescence imaging and magnetic resonance imaging in cancer cells.

Abstract:First, anodic aluminum oxide (AAO) membranes with a 150 nm diameter and a 230 nm interpore distance and superparamagnetism γ-Fe2O3 nanoparticles with 8 nm average diameter were prepared using hard anodization process and coprecipitation method, respectively. Then, the anionic γ-Fe2O3 nanoparticles by polyacrylic acid modification and cationic polymers were co-assembled into γ-Fe2O3 nanowire arrays in the pores of AAO membranes through a bottom-up assembly process. At last, the morphology of γ-Fe2O3 nanowire arrays was characterized by SEM. The remanence and coercivity of the nanowire arrays were nearly zero by means of a vibrating sample magnetometer (VSM), which showed that the γ-Fe2O3 nanowire arrays inherited the superparamagnetism behavior of single nanoparticles.

Abstract:Novel gum arabic （GA）graft 2-acrylamido-2-methylpropanesulfonicacid (AMPS) and attapulgite (APT) biomass resin (GA-g-PAMPS /APT) was synthesized by grafting polymerization using microwave irradiation. The structure and thermal stability of superabsorbent resin were characterized by FTIR, XRD and TG , respectively. The effects of various saline and pH solutions on swelling properties were investigated，and the swelling rate and reswelling capacity were also evaluated. The results showed that GA, APT and AMPS produced the grafting copolymerization reaction. The resin containing w(GA)=7.5% and w(APT)=10% showed the highest water absorbency of 783 g/g and 91 g/g in the deionized water and in normal saline, respectively. The resin showed excellent responsive properties and reversible characteristics in pH and salt solutions. The introduction of APT into simultaneously the polymeric network obviously improved the thermal stability, the swelling rate, reswelling capability and pH resistant property.

Abstract:A novel polyamine-type polystyrene resin with triethylenetetramine functional group was synthesized from polystyrene resin through the acetylation followed by the condensation of triethylenetetramine. Effects of reaction solvent, catalyst, mole ratio of raw materials, time and temperature were discussed. The stability and the adsorption property of the polyamine-type polystyrene resin toward 4-nitrophenol were also studied. The results showed that the complete exchange capacity of the synthesized resin is 4.35 mmol•g-1 when the synthetic reactions take place in 1,2,4-trimethylbenzene by toluenesulfonic acid as catalyst at 160℃ for 20 hours. The equilibrium adsorption capacity of the synthesized resin toward 4-nitrophenol is 192.43 mg•g-1.

Abstract:The conductive composites were prepared from pyrrole (Py) and 4-sulfonic diphenylamine (SD) by chemico-oxidative method using graphene (RGO) as the dopant. Through orthogonal test and dispersive test, we found the best conditions of synthesizing the composites were as follows: the oxidant is FeCl3･6H2O, the mole ratio of oxidant and monomer is 1:1, the mole ratio of Py and SD is 7:3(total amount is 0.01 mol), the doping amount of graphene is 0.05 g; Under the above conditions, the conductivity of the composite was 12.05 S/cm, and it had better dispersion in water. The composites were characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The thermal stability of the composites was tested by Thermal Gravimetric Analyzer (TGA). Results showed that the structure unit of SD was successfully embedded in the molecular chain of the polypyrrole (PPy), conductivity and thermal stability of the composites were significantly improved by the doping of RGO. Meanwhile, the composite was added as conductive filler to the waterborne polyurethane to study antistatic performance and mechanical properties of the coating, the comprehensive performance of the coating is better and the surface resistivity of the film can reach 8.65×107 Ω when the added amount is 4%.

Abstract:Novel organic dyes 4 and 5 containing 2-(10-oxophenanthren-9(10H)-ylidene)malononitrile and triphenylamine (or N,N-bis(4-butylphenyl)aniline) moieties as an electron acceptor and an electron donor, respectively, were designed and synthesized. The photophysical and electrochemical properties of these dyes and their precursors were investigated by UV-VIS spectroscopy, fluorescence emission spectroscopy, cyclic voltammetry, and DFT calculation. The dyes 4 and 5 exhibited good absorption bands and emission bands in the UV-VIS region. The maximum absorption wavelengths were 581 and 605 nm, and the maximum emission wavelengths were 442 nm and 472 nm, respectively. Compared with the effect of malononitrile on HOMO energy levels, the introduction of malononitrile group had more impact on LUMO energy levels.

Abstract:The production and application of fluorinated surfactants containing long fluorocarbon chains have been restricted due to their environmental persistence and bioaccumulation. Thus seeking replacement products is in urgent needs. In this work, the oil-water interfacial tension of a perfluorobutyl-based cationic fluorinated surfactant, C4F9SO2NH(CH2)3NH(CH3)2+Cl- (PFB-MC), was investigated. PFB-MC was highly surface active in acidic aqueous environment. The effects of different kinds of additives, such as NaCl, hydrochloric acid, n-butanol, iso-butanol, n-pentanol, n-hexanol, and alkyltrimethylammonium chlorides (CnH2n+1N(CH3)3Cl, n = 12, 16, 18), on the interfacial tension of PFB-MC at n-heptane-water interface were studied. The surface tension of the aqueous mixtures of PFB-MC and CnH2n+1SO3Na (n = 4, 6, 8) were measured, as well as their interfacial tension against n-heptane. The interfacial tension of the mixture of PFB-MC and sodium dodecylbenzene sulfonate (SDBS) was also measured for comparison. The results showed that, the addition of relatively high concentration of NaCl, hydrochloric acid, or fatty alcohols could all reduced the oil-water interfacial tension of the system, however, the reduction of interfacial tension was only 1~3 mN/m; In contrast, the addition of CnH2n+1SO3Na brought the best synergism and could remarkably reduce the oil-water interfacial tension of PFB-MC by a reduction of 4~9 mN/m, and the interfacial tension decreased with the chain length of sodium alkane sulfonates; However, the interfacial tension of the mixture of PFB-MC and SDBS was rather high (18.6 mN/m for the clear phase ) because of the poor solubility.

Abstract:To investigate the influence of different surfactants, alcohols, salts and their contents and the mass ratio of alcohols to surfactants on the isotropic microemulsion zone of the (AEO-9/SAS60)/petroleum ether/Alcohol/water system, pseudo ternary phase diagrams of (AEO-9/SAS60)/petroleum ether/Alcohol/water systems under different conditions were constructed. AEO-9 and SAS60 were used in surfactants. Alcohols used were C2H5OH, n-C4H9OH, n-C5H11OH, n-C8H17OH. Phase diagrams showed that the synergism was the best when the mass ratio of AEO-9 to SAS60 was 7:3. The single-phase region of the n-pentanol-containing system was the largest among the systems studied. The amount of the solubilizing petroleum ether was maximum when the mass ratio of n-butyl alcohol to surfactants was 0.8；Surface tension reached 24.49mN/m when the concentration of microemulsion was 1.824g/L. The oil-water interfacial tension can reached 9.25?0-4mN/m, when the concentration of microemulsion was 0.3%.

Abstract:The traditional Schotten-Baumann reaction uses non eco-friendly fatty acyl chloride and VOC and produces by-product of sodium chloride. A novel synthesis method based on the improved Schotten-Baumann reaction is developed to synthesize sodium N-lauroylglycinate (SLG) from methyl laurate (ML) and sodium glycinate (SG) catalyzed by sodium methoxide (SM) in glycerol, and the final product is confirmed by FT-IR and 1H-NMR as the target molecule of SLG. Some affecting factors on the condensation reaction are investigated such as reaction solvent type, catalyst type, molar ratio of ML to SG, the catalyst dosage of SM, reaction time and temperature, and it is showed that the yield of SLG reached 78.7% under the molar ratios of ML/SG/SM being 1.0 : 2.5 : 0.02 and catalyzed by SM for 3.5 h at 135 oC in glycerol. Compared with the traditional Schotten-Baumann reaction, the improved method is eco-friendly, free from the bothersome by-product of sodium chloride and getting rid of VOC.

Abstract:Bicyclohexyl-4,4’-dione was successfully synthesized by Salen Mn(III) catalyzed oxidation of bicyclohexyl-4,4'-diol using sodium hypochlorite as an oxidant and NBS as bromine source. The parameters including the Salen Mn(III) dosage, NBS dosage and sodium hypochlorite dosage were investigated. It was found that bicyclohexyl-4,4'-diol achieved a conversion of 96.1% and the selectivity of bicyclohexyl-4,4'-dione reached up to 93.0% under the optimum conditions: bicyclohexyl-4,4'-diol dosage 0.5 mmol, Salen-Mn(III) dosage 0.04 mmol, NBS dosage 0.26 mmol , sodium hypochlorite dosage 18 mmol, reaction temperature 25 ℃, and reaction time 0.5 h.

Abstract:2-(2-Oxo-2H-1-benzopyran -3-yl)benzoxazole-5-carboxylic acid was synthesized from salicylaldehyde, ethyl cyanoacetate and 3-amino-4-hydroxybenzoic acid. Then eight new amide-containing coumarin derivatives were synthesized via acylcholorination and N-acylation for the first time. The yields were between 41 % and 65 %. Their structures were identified by nuclear magnetic resonance spectroscopy, mass spectroscopy and infrared spectroscopy and treated with UV-Vis and fluorescence spectroscopy to investigate their optical physical properties. The results: the π-π* transition peaks were between 250 nm and 255 nm, the maximum absorption wavelengths were between 345 nm and 360 nm, the emission maximum λem was about 440 nm , the Stokes shift was about 90 nm and the fluorescence quantum yield was about 0.05. Their molar absorption coefficients were about 105 M-1•cm-1, showed that they are a kind of potential fluorescent materials.

Abstract:In an attempt to search for natural product-based antifungal agents, twenty novel dehydroabietic acid-based B ring-fused-thiazole-amide compounds (Ⅵa~t) were designed and synthesized by using dehydroabietic acid as a starting material. The synthetic conditions were investigated preliminarily, and the target products were characterized by FTIR, 1HNMR, 13CNMR, and ESI-MS. The antifungal activity was also evaluated against the following 5 plant pathogens: Fusarium oxysporum f. cucumerinum, Cercospora arachidicola, Physalospora piricola, Alternaria solani, and Gibberella zeae. The preliminary bioassay showed that, at the concentration of 50 mg/L, the target product dehydroabietic acid-based B ring-fused-thiazole-benzamide (Ⅵj) and the intermediate dehydroabietic acid-based B ring-fused-thiazole-amine (Ⅴ) had inhibition rates of 90.0% and 92.4% against Physalospora piricola(A-class activity level), respectively.

Abstract:In this paper, nano-α-Fe2O3 was synthesized by a facile hydrothermal method, and further utilized as heterogeneous Fenton catalysts for the degradation of acid orange 7. The mechanism of nano-α-Fe2O3/H2O2 system was investigated. The structural properties of α-Fe2O3 was characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). SEM showed that α-Fe2O3 exhibited a rod-like morphology with a width of 20 nm and a length of 70 nm. To optimize the operating parameters, the effects of initial pH, substrate concentration, H2O2 concentration, catalyst loading, and reaction temperature in the degradation of acid orange 7 were studied. With the optimized experimental conditions (initial pH = 3.0, substrate concentration = 200 mg/L, H2O2 concentration = 1.5%, catalyst loading = 50 mg/L, and reaction temperature = 30 篊), the degradation rate of acid orange 7 and COD were up to 98.74% and 73%, respectively, after 120 min. The cyclic stability of α-Fe2O3 was evaluated. It was confirmed that the α-Fe2O3 exhibited excellent stability. No significant catalyst deactivation was noted in the five successive runs. The concentration of the dissolved iron ions was lower than 0.8 mg/L. The free radicals generated in the system was characterized. Mechanistic studies showed that HO? plays a critical role in this system.

Abstract:A series of Cr-Ce/H-MOR catalysts with different molar ratio of chromium to cerium were prepared by incipient wetness impregnation. The obtained catalysts were characterized by XRD, H2-TPR and NH3-TPD. The characterization results indicated that the chromium oxides and cerium oxides were introduced on the surface of H-MOR and the synthesized catalysts definitely possess proper acidity and redox property. The catalytic performance of obtained catalysts on degradation of trichloroethylene(TCE) were investigated on a continuous fixed bed reactor with GHSV of 15,000h-1. And 1Cr-1Ce/H-MOR sample showed best catalytic performance with the conversion of TCE of 90% at the reaction temperature of 279.4℃ and considerable stability of decreased activity of 9.2% after 400 min. The 1Cr-1Ce/H-MOR catalyst before and after reaction were further characterized by XRD, TG and XPS individually, the results showed that no carbon deposition and structural change were found. The decrease of the molar ratios of Cr6 and Ce3 and the adsorption of Cl species on the surface might be the main reasons for the decreased activity of the catalyst.

Abstract:The molybdenum complex of pyridine Schiff-base, [MoO2(L)(EtOH)] [L=2-(pyridin-2-ylmethylidene)aminophenol] was synthesized using one-pot reaction. The complex was characterized the methods of by FTIR, TG, XPS, elemental analysis and ICP. The catalytic activity for the epoxidation of soybean oil by tert-butyl hydroperoxide was studied. The influencing factors of reaction were studied such as the reaction temperature, reaction time, mass of catalyst, soybean oil and oxidant molar ratio. Under the conditions of molar ratio of soybean oil to tert-butyl hydroperoxide = 1:1.5, dosage of catalyst = 30 mg, reaction temperature at 80℃ and reaction time = 10 h, the conversion of soybean oil is 69.7% and the selectivity of epoxidized soybean oil is 62.9%.

Abstract:Pt-Ni/MWCNTs composite catalyst was successfully synthesized with platinum and nickel supported on multi-walled carbon nanotubes (MWCNTs) by impregnation-reduction method. The Pt-Ni/MWCNTs catalyst was characterized by transmission electron microscopy (TEM) and X–ray powder diffraction (XRD). The results show that Pt and Ni were uniformly loaded onto the carbon nanotubes. The Pt-Ni composite catalyst has a approximate particle size of 2 nm. XRD demonstrate that the composite catalyst is a solid solution structure based on Pt crystal lattice. The electrochemical performance of the modified electrode was evaluated by cyclic voltammetry and chronoamperometry in alkaline media. Electrochemical measurements indicate Pt-Ni/MWCNTs could directly catalyze the oxidation of glucose and a selectivity of 571.68 μA•mmol/(L•cm2) towards glucose oxidation was obtained. The composite catalyst displayed a wide linear range from 10 μmol/L to 8.2 mmol/L (R=0.9994) with the limit of detection of 0.5 μmol/L (S/N=3). The sensor exhibits excellent selectivity, stability and repeatability. The interferences from the oxidation of ascorbic acid, uric acid and dopamine could be effectively avoided.

Abstract:Two novel long chain multi SO3H-functionlized heteropolyanion-based ionic liquids S4ILs 、S3ILs were synthesized by using aliphatic polyamines, 1,3-propane sultone and Keggin type heteropolyacid as the sources chemicals via quaternarization and acidification two step reaction. Their structures were confirmed by FT-IR, 1H NMP. Two ionic liquids acted as homogeneous catalysts for selective oxidation of benzyl alcohol using 35% H2O2 as oxidant under solvent-free conditions was studied. When the mole ratio of ionic liquids/alcohol/H2O2 =0.05:30:45,the reaction could completed at 70℃ within 4 hour, for S4ILs the corresponding benzaldehydes were obtained in the yields of 81% to 100%. But for S3ILs the corresponding benzoic acids were obtained with yields of 64% to 94%. Two ionic liquids could be easily recovered after removal of water, washed with diethyl ether and drying under vacuum and reused five times without loss in their catalytic activity.

Abstract:In order to optimize the thermal reaction recipe of the pork ribs soup flavoring much accurately, reduce subjective errors and improve the accuracy of the sensory evaluation,the sequential orthogonal optimization method was used, which was a method optimized by the part to the whole，to optimize the preparation process of the pork ribs soup flavoring. In order to optimize the thermal reaction recipe of the pork ribs soup flavoring much more accurately, on the basis of previous studies, the sequential orthogonal optimization method was summarized, which was a method optimized by the part to the whole. All thermal reaction materials were divided into three systems, including carbon, nitrogen and flavor system through the single-factor analysis and the different contributions in the thermal reaction. At last, the thermal reaction flavoring was figured out : the condition tempreture is 121～123 ℃, time 15 min and the pressure 0.11～0.12 Mpa. The optimal recipe of the flavoring was carbon system 6.00g (glucose 5.000g, D-xylose 1.000g), nitrogen system 41.770g 〔enzymatic hydrolysate of porcine bone 18.750g, pork enzymatic hydrolysate 18.750g, hydrolyzeed vegetable protein 1.350g, amino acids packet 2.920g (cysteine 0.730g, glutamic 0.730g, arginine 0.730g, proline 0.730g)〕, flavouring system 8.532g (Vitamin B1 0.270g, Disodium5’-ribonucleotide 0.162g, yeast extract 0.900 g, porcine bone oil 7.200g).

Abstract:Novel dinuclear Cu(II) and Ni(II) complexes of thiophene-containing bissalicylaldehyde Schiff base were synthesized with 5′-methylene-bis(salicylaldehyde)-5-methyl-2-[(2-aminophenyl)amino]thiophene-3-carbonitrile (L) and copper acetate or nickel acetate as raw materials. The complexes were characterized by titrimetric analyses, elemental analyses, UV-Vis, FT-IR spectra and thermal analysis (TG-DSC). The composition of the symmetrical binuclear Schiff base complexes was [M2L(H2O)2] (M = Cu2+, Ni2+). The central Cu2+ or Ni2+ ions were coordinated by imino nitrogen atoms, phenolic oxygen atoms and amino nitrogen atoms from the Schiff base ligand, and oxygen atoms from the coordinated water molecules, respectively. The pyrolysis reactions in the thermal decomposition processes of the complexes included dehydration and the oxidative decomposition of the ligand, at last only CuO or NiO was obtained.