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Current Issue
2011 Vol.28 Issue.2,
Published 2011-03-15
Article
Article
1
Synthesis and Properties of UVCuring Organosilicone Acrylate
ZHANG Lin-Lin, TU Jiang-Lei, DENG Yang-Quan, ZENG Xian-Shi, CHENG Li-Ping, ZHANG Zhi-Bin, CHEN Shi-Long
UV curing organosilicone acrylate was synthesized with DMC and acrylic acid as raw materials.The effects of polymerization inhibitor and watercarrying agent on the synthesis were studied.The mechanical properties,surface energy,curing time and solubility of the UVcuring membrane were determined,and the UVcuring membrane was characterized by infrared spectroscopy(FTIR).The mechanical properties of the UVcuring membrane are good and surface energy is low while it is adjusted by adding different monomers.The UVcuring membrane is insoluble in water and acid solution,but soluble in organic solvents and alkaline solution.
2011 Vol. 28 (2): 1-5 [
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2205
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6
Effects of Chloride Fluxes on the Luminescence Properties of Y3Al5O12∶Ce3+ Phosphors
ZHANG Bao-Chang, Zhou-Rui-Ting, Zhang-De-Wen, Sun-Shu-Qing
In this paper,LiCl,NaCl,KCl or SrCl2 were selected as fluxes and the effect of the chlorides fluxes on crystallite,morphology and luminescence properties of the YAG∶Ce phosphor powders were investigated.It was found that the YAG∶Ce phosphors obtained from initiative materials containing chlorides fluxes exhibited typical garnet structure and no impurity phase.The YAG∶Ce particles are regular spherical or elliptical morphology,with small size and narrow granular distribution.The emission intensities of the YAG∶Ce phosphors increased with adding appropriate amounts of chlorides fluxes to initiative materials.The optimum amounts of chloride fluxes were 10% for LiCl,7% for NaCl,7% for KCl or 4% for SrCl2,respectively.
2011 Vol. 28 (2): 6-10 [
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2675
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271KB] (
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11
Characterization of Coal Tar Pitch and Paving Pitch by UV,EA and NMR
XIAO Yanhua, FENG Ruijie, CAO Sumei, LIU Xiangyong, GAO Ting, PAN Zhiquan
In order to enlarge the use of coal tar pitch(CTP) in paving road,CTP and 60th paving pitch(PP) were extracted by nheptane,toluene and ethanol step by step in a Soxhlet apparatus.The three fractions of CTP and PP were detected using UVabsorption(UVA),elemental analyses(EA) and nuclear magnetic resonance(NMR) firstly as a whole unit after quality characterization of physical nature of CTP and PP were finished.The CTP had more saturate aliphatic and residue compounds dissolved in ethanol.On the other hand there were more continental type structures of aromatic ring than that of PP.There was almost no residue in PP after extracted by ethanol.The results explained why CTP was crisp in cold winter and was soften in summer.The following research will focus on how to change the chemical construction of CTP into the relative similar structures with those of PP through adding polymer.
2011 Vol. 28 (2): 11-17 [
Abstract
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4384
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216KB] (
4057
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18
Preparation of Pigment Electrophoretic Particles and Its Application in EInk
WANG Jing, FENG Ya-Qing, LI Xiang-Gao
Pigment electrophoretic particles were prepared with Hansa yellow 10G as materials,hyperdispersant and assistantdispersant as modifier.Dispersibility,particle size distribution and electrophoretic mobility of modified Hansa yellow 10G in the electrophoretic medium were studied.The Hansa yellow 10G particles modified with hyperdispersant were characterized by FTIR and SEM.EInk containing dispersion liquids of modified Hansa yellow 10G was prepared by coacervation.Experiments revealed that Hansa yellow 10G particles modified with hyperdispersant had reversible electric response in the microcapsules.
2011 Vol. 28 (2): 18-23 [
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3176
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393KB] (
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24
Evaluation of CO Tolerant Ability of PtRu/C Catalysts for Fuel Cells
ZHAO Li-Hua, LIANG Bao-Chen, JIA Xiao-Chuan, ZHANG Jiang-Ping, CAO Li-Jing, ZHANG Yin-Bao, Li-Xiang
PtRu/C elecrtrocataylsts for PEMFC was prepared using reverse micelles method.The reverse micelles system was composed of water,cyclohexane,surfactant SBS and noctanol， the molar ratio of H2O to SBS and the mass ratio of SBS to cyclohexane were chosen as 7 and 0.115,respectively,and KBH4 solution was used as reductant.The performance of PtRu/C catalysts were investigated under a continue runing condition of a single PTMFC.The electrocatalytic activity,stability and CO tolerant ability of catalysts were evaluated by Vt curves and IV chariticristics of PEMFC.The results were compared with the commercial PtRu/C catalyst(JM Corporation).
2011 Vol. 28 (2): 24-28 [
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2133
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29
Synthesis of p-Methylsulfonylphenylserine Copper
HAN Yu-Ying, SONG Jian, FENG Rong-Xiu, ZHAO Jun-Yan
The synthesis process of pmethylsulfonylphenylserine copper was studied in this paper.Methylsulfonylbenzaldehyde,glycine and copper sulfate were used as raw materials,and ammonia as catalyst.The results demonstrated the optimal conditions of the preparation process were as follows∶p-methylsulfonylbenzaldehyde∶glycine∶copper sulfate∶H2O=1∶11∶055∶170(molar ratio),reaction tempreture was 50 ℃,pH=9,reaction time was 30 hours.The yield of pmethylsulfonylphenylserine copper was approximately 80% under the optimal conditions.And they were characterized by TCL,LCMS and IR.The mechanism of the reaction was identified and the possible side reaction was speculated.
2011 Vol. 28 (2): 29-34 [
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35
Preparation of Basic Magnesium Sulfate Whisker
GUO Shu-Yuan, ZHANG Yu-Shan, HUANG Xi-Ping, DONG Ze-Liang
The leached type Mg(OH)2 was prepared with brine and ammonia water as raw material. The leached type Mg(OH)2 and magnesium sulfate solution were put into the autoclave to prepare basic magnesium sulfate whiskers by hydrothermal reaction. The effects of concentration of magnesium sulfate heptahydrate, the temperature of the reaction, the rate of electric mixer, the raw material ratio, and the time of reaction on the preparation were discussed. The optimal experimental condition have been attained: The concentration of magnesium sulfate heptahydrate was 08 mol/L,the temperature of reaction was 160 ℃, the rate of electric mixer was 300 r/min, the raw material ratio of MgSO4.7H2O:Mg(OH)2 was 2:1, the time of reaction was 8 h. And SEM,XRD,TG-DTG were performed for analysis of basic magnesium sulfate whiskers.
2011 Vol. 28 (2): 35-39 [
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2252
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40
Biosorption of Pb2+ in Seawater by Chlorella Pyrenoidosa
KOU Xi-Yuan, ZHANG Xiao-Qing, ZHANG Ai-Jun, ZHANG Yu-Shan, WANG Jing
The process of biosorption of Pb2+ by chlorella pyrenoidosa, its adsorption thermodynamics and adsorption kinetics were investigated in this paper.The effects of biomass concentration,pH value,temperature,initial Pb2+ concentration and adsorption time on biosorption were studied respectively. Result showed that the adsorption rate did not fluctuate remarkably when the biomass concentration varied at the range of 05 g/L to 4 g/L.The biosorption was significantly affected by initial solution pH and the optimal pH value of biosorption of Pb2+ by chlorella pyrenoidosa was 4—6. On the other hand,the adsorption quantity of Pb2+ by chlorella pyrenoidosa was positively correlated with the initial concentration of Pb2+. Kinetic studies revealed that the biosorption was rapid,the absorption reached its equilibrium within 60 min at 25 ℃.These experimental results could be accurately described by second order kinetic model.The Freundlich model fitted the experimental data quite well.This can give references to purification process of seawater contained lead.
2011 Vol. 28 (2): 40-44 [
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3330
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45
Extractive Technique of Flavonoids from Platycladus Orientalis by Microwave Extraction Method
MA Cui, LIAO Ke-Jian, ZHAO Zhi-Tian, YUAN Bao-Long
The extraction of flavonoids Platycladus orientalis by microwave was plimized. Taking the yield of flavonoids as index, the best extraction process was investigated by orthogonal experiment. The optimal condition is: ethanol concentration 60%(V), solidliquid mass ratio 1∶20, microwave time 4 min, microwave power 385 W.Certification experiment was done under these conditions, the extraction yield of flavonoids in Platycladus orientalis was 5905%.Compared with the direct heating extraction, microwave extraction can greatly shorten the extraction time, decrease the extraction dosage, and improve the yield of the extractants. Quality analysis was investigated for the extracted active ingredients and results showed that the extractants were determined to be from Platycladus orientalis.
2011 Vol. 28 (2): 45-48 [
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4098
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144KB] (
2973
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49
Optimization of Fermentation Conditions for Raw Starch Residue of Potatoes
YUE Chang-Hai, ZHU Xu-Hui, HOU Wen-Gui, LI Ping-Li
The influencing factors of fermentation process using the uncooked starch residue of sweet potatoes were investigatel through orthogonal experiments. The magnitude of factors were in an order of pH, fermentation temperature, time, the ratio of water to material, and the amount of Koji. And the best fermentation condition is: fermentation pH is the natural pH of the raw material, temperature is 33 ℃, fermentation time is 180 h, ratio of water to stuff is 24 and the amount of Koji is 09%. Under these conditions, alcohol yield can reach 88.2%。
2011 Vol. 28 (2): 49-54 [
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2226
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223KB] (
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55
Regeneration Method of Used Combustion Engine Oil
REN Ya-Lin, GUO Da-Guang, WANG Li-Fang
In this experiment, regeneration of the used engine oil was obtained by the reaction of the deteriorated part in the lubricating oil with the sodium liquid ammonia solution as chemical reagent. The experimental results show that the optimal conditions are: the addition of the sodium liquid ammonia solution proportion is 32 mL(based on 100 g used oil ), refining temperature 40 ℃,viscosity index 100 And after the clay adsorption to improve the color degree of the regeneration oil, the various index of the recovered oil can meet the requirement of HVI standard.
2011 Vol. 28 (2): 55-58 [
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2244
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59
Optimization of Hydrodearomatization to Naphthalene with MoP/SiO
2
-TiO
2
-ZrO
2
Catalyst
YANG Xin-Jia, DING Bao-Hong, LU Meng-Meng, ZANG Shu-Liang
In this paper, SiO
2
-TiO
2
-ZrO
2
composite carrier was prepared by coprecipitation method and was used as supports for preparing MoP/SiO
2
-TiO
2
-ZrO
2
catalyst. In a fixedbed microreactor, with the naphthalene and dodecane solution as model compound, the effects of the four factors of reaction temperature, reaction pressure, liquid hourly space velocity and volume ratio of hydrogen to oil on the dearomatization were investigated by orthogonal test. The optimized process conditions of hydrodearomatization were obtained as: reaction temperature of 360 ℃，reaction pressure of 5 MPa, LHSV(liquid hourly space velocity) of 3 h
-1
and volume ratio of hydrogen to oil 400∶1, the conversion rate of naphthalene was 91.23%. Under this reaction condition, the cetane number of FCC diesel oil can increase more than 15 unites, and the yield reaches 96.28%.
2011 Vol. 28 (2): 59-62 [
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1924
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63
Synthesis of β-methylnaphthoquinone by Catalytic Oxidation of β-methylnaphthalene with WO3/HMS Catalyst
LI Dong-Jun, YUE Li, LAI Shi-Quan, LI Wen-Jun, ZHANG Jia-Da, WANG Rong-Rong
β-methylnaphthoquinone (β-MNQ) was synthesized by heterogeneous catalytic oxidation of β-methylnaphthalene (β-MN) with WO3/HMS as catalyst and hydrogen peroxide as oxidant in acetic acid (HAc). The catalyst of molecular sieve WO3/HMS was prepared with (NH4)2WO4 as tungsten source. The effect of process conditions such as reaction temperature, reaction time, loading content of WO3, catalyst usage and mass fraction of oxidant on the reaction were investigated. The experimental results showed that the optimum conditions of β-MNQ synthesized with βMN over WO3/HMS catalyst were as follows: the reaction temperature was 353 K, the reaction time was 6 h, n(H2O2)/n(β-MN)=18:1, the amount of catalyst with n(Si)/n(W)=30 was 0.3 g/mL(based on HAc). Under these conditions, the selectivity and the yield of β-MNQ were up to 51.7% and 46.9%, respectively.
2011 Vol. 28 (2): 63-67 [
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2241
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212KB] (
3406
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68
Esterification Catalyzed by Mesoporous Sieve K2O/SBA-15
CUI Xiao-Yan, Shen-Jian, LIU Cheng, SHEN Si-Wei
Solid base catalyst K2O/SBA15 was prepared by loading potassium nitrate on mesoporous sieve SBA15 and then was calcined. The samples were characterized by XRD and BET and used as catalyst in the synthesis of methyl oleate. The experimental results showed that when the loaded amount of K2O was 2%, molar ratio of methanol／oleic acid was 2∶1，reaction temperature was 180 ℃，reaction time was 4 h and the ratio of catalyst to raw material was 5%(weight ratio), the esterification rate was 8361%. The results also showed that K2O/SBA15 had a good catalytic effect after resued.
2011 Vol. 28 (2): 68-72 [
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73
Progress in Purification and Resource Utilization of Rural Biogas
LI Fen-Rong, YI Hong-Hong, TANG Xiao-Long, NING Ping, YU Qiong-Fen
Purification of biogas is an important process in the utilization of biogas resources. This paper introduces the composition of biogas in rural areas, and the existing primary metheds and characteristics of the purification of biogas are summarized. At present the purification technology of biogas mainly is to remove carbon dioxide, hydrogen sulphide and water vapor (H2O). Desulphurization technology mainly includes dry desulfurization, wet desulfurization and biological desulfurization, etc., the removal of carbon dioxide mainly have three kinds of method, such as liquid absorption, solid adsorption and membrane separation, and the removal of water vapor in biogas mainly have condensation method, liquid absorption and solid adsorption and so on. In addition, some methods of the removal of siloxane, halogenated hydrocarbons, and nitrogen and other impurities were introduced. With the actual situation, a direction of resource utilization of biogas in rural areas is put forward: According to the different methods of using biogas, a different technology of purification and utilization should be choosen so that biogas can be used efficiently.
2011 Vol. 28 (2): 73-78 [
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4692
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134KB] (
4256
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