Synthetic and Performance Research on the New Type Hydrogel with Acrylic Acid and Acrylamide Unit

2013 ◽  
Vol 864-867 ◽  
pp. 690-693
Author(s):  
Wu Zhang ◽  
Lina Hou ◽  
Ling Li ◽  
Yun Dong Fang ◽  
Chun Zheng Song ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Sodium Sulfite ◽  
Orthogonal Experiment ◽  
Gel Strength ◽  
Molar Ratio ◽  
Water Absorbency ◽  
New Type ◽  
And Performance ◽  
Optimized Conditions ◽  
Performance Research

High acrylamide content hydrogel was synthesized under mild condition through a copolymerization reaction between acrylic acid (AA) and acrylamide (AM) using N, N-methylenebis-acrylamide as crosslinker and potassium persulfate combination with sodium sulfite as initiator in aqueous solution. The factors with influence on water absorbency performance including molar ratio of AM to AA, neutralization degree, content of crosslinker and initiator were investigated. Further orthogonal experiment with four factors and three levels were employed to determine the optimized conditions, in which not only water absorbency but also gel strength was taken into account.

Synthesis and Water Absorbency of Poly(acrylic acid-co-acrylamide)

2011 ◽  
Vol 250-253 ◽  
pp. 695-698 ◽  
Author(s):  
Ting Xi Li ◽  
Na Kong ◽  
Su Su Gao ◽  
Peng Sui ◽  
Yu Hua Zhao ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Water Absorption ◽  
Aluminum Hydroxide ◽  
Potassium Persulfate ◽  
Molar Ratio ◽  
Water Absorbency ◽  
Mass Ratio ◽  
New Type ◽  
Poly Acrylic Acid

A new type of poly (acrylic acid-co-acrylamide) was synthesized by copolymerization method using acrylic acid (AA) and acrylamide (AM) as monomer. Synthesis technology was as follow: the acrylamide and acrylic acid molar ratio was 0.3-0.4, the temperature was 55-60°C, the degree of neutralization of AA was 70%, the potassium persulfate and monomer mass ratio was 0.2%-0.3%, the aluminum hydroxide and monomer mass radio was 0.03%-0.05%. The water absorption was more than thousands of times.

Synthesis, Characterization and Performance of Superplasticizer with a Multi-Arm Structure

2015 ◽  
Vol 815 ◽  
pp. 594-600 ◽  
Author(s):  
Xiao Liu ◽  
Zi Ming Wang ◽  
Jie Zhu ◽  
Ming Zhao ◽  
Yun Sheng Zheng
Keyword(s):  
Acrylic Acid ◽  
The Self ◽  
Molar Ratio ◽  
Esterification Reaction ◽  
Reaction Products ◽  
Reaction Conditions ◽  
H Nmr ◽  
Polyhydric Alcohols ◽  
Esterification Rate ◽  
And Performance

A novel superplasticizer with a multi-arm structure, i.e., a “core” connected with multiple copolymer “arms”, was synthesized through two steps including an esterification reaction between polyhydric alcohols and acrylic acid and a copolymerization reaction in an aqueous solution among the esterification product, isobutenyl polyethylene glycol and acrylic acid. The reaction conditions were determined, and the results showed that the esterification rate can reach above 95% with a water-carrying agent of 70g, a catalyst/alcohol molar ratio of 0.07, an inhibitor/monomer molar ratio of 0.03, and a reaction time of 7 hrs. The reaction products were characterized by 1H Nuclear Magnetic Resonance (1H NMR) and Fourier Transform infrared spectroscopy (FTIR). It is confirmed to be the multi-arm structure, and the self-synthesized superplasticizer with a multi-arm structure exhibited higher energy efficiency, which was in accordance with its excellent paste fluidity performances and adsorption behavior in cement paste

Synthetic Technology and Performance of a Novel Fatty Alcohol Polyoxyethylene Carboxylate Surfactants

2011 ◽  
Vol 298 ◽  
pp. 163-168 ◽  
Author(s):  
Yuan Yuan Lei ◽  
Guo Zheng ◽  
Yu Sun ◽  
Yong Zhou
Keyword(s):  
Reaction Time ◽  
Optimum Condition ◽  
Sodium Hydroxide ◽  
Fatty Alcohol ◽  
Succinic Anhydride ◽  
Foam Stability ◽  
Raw Materials ◽  
Molar Ratio ◽  
New Type ◽  
And Performance

In this paper, with fatty alcohol polyoxyethylene (AEO9), succinic anhydride (SA) and sodium hydroxide as raw materials, a new type of fatty alcohol polyoxyethylene carboxylate surfactants (SAE9C-Na) was obtained by esterification and neutralizing effect. The influencing factors were researched and its surface properties were studied. The optimum condition of synthesis was determined: molar ratio of alcohol to acid was 1:1.1, reaction temperature was 85°C, reaction time was 60 min, under this condition, the yield could reach up to 95.8%. The results received from this experiment showed that SAE9C-Na had excellent surface activity and foaming and foam stability, whose emulsification and solubility enhancement were improved greatly.

Effects of Complex Enzymes Modification on Functional Properties of Soybean Protein Isolate Based on Orthogonal Experiment

2020 ◽  
Vol 980 ◽  
pp. 144-153
Author(s):  
Lei Yu ◽  
Guang Yu Yan ◽  
John Beattie
Keyword(s):  
Soybean Protein ◽  
Orthogonal Experiment ◽  
Protein Isolate ◽  
Gel Strength ◽  
Neutral Protease ◽  
Soybean Protein Isolate ◽  
Optimized Conditions ◽  
Alkaline Enzyme ◽  
Single Factor Experiment ◽  
Complex Enzymes

Soybean protein isolate (SPI) is widely used in food industry because of its high protein nutritional function and good functional characteristics. However, due to the effect of amino acid composition and spatial structure on natural protein, its practical application is greatly limited. So it needs to be properly modified to meet the needs of production. In this study, SPI was used as substrate to explore the most suitable modification conditions by using complex enzymes (flavor protease, neutral protease, alkaline enzyme and transglutaminase) enzymolysis and then TG enzyme cross linking, in order to obtain SPI products with both solubility and gel as a special protein isolate for surimi products. The results show that: through the single factor experiment and orthogonal experiment, the optimized conditions of gel strength were determined: flavor protease: neutral protease: alkaline enzyme 1:1:2, pH 7, enzymolysis temperature 45°C, enzymolysis time 30 min. The optimized conditions of solubility: flavor protease: neutral protease: alkaline enzyme 1:2:2, pH 7, enzymolysis temperature 55°C, enzymolysis time 60 min. The result of orthogonal experiment: the optimized conditions was that flavor protease: neutral protease: alkaline enzyme 1:1:2, pH 7, enzymolysis temperature 55°C, enzymolysis time 60 min. The gel strength of products was 35.45 g, decreased 5.33% with control; Solubility was 36.24%, increased 54.01% with control. The modified SPI has excellent gel and solubility, and can be further applied to surimi products industry. And the results of this study provide a theoretical basis for its further application in surimi products.

Effect of the Adjuvants on the Properties of Superfine SnO2 Powders

2018 ◽  
Vol 281 ◽  
pp. 705-709
Author(s):  
Jie Guang Song ◽  
Lin Chen ◽  
Xian Jie Zhou ◽  
Xue Yang ◽  
Xin Peng Lou ◽  
...  
Keyword(s):  
Particle Size ◽  
Grain Size ◽  
Solar Cells ◽  
Reaction Time ◽  
Powder Material ◽  
Tin Oxide ◽  
Molar Ratio ◽  
New Type ◽  
And Performance ◽  
Holding Temperature

Ultrafine SnO2 is a new type of material, in the field of solar cells and semiconductors have a lot of use. To get different morphology and different properties of tin oxide powder material, making more applications in the field, the effect of the adjuvants on the properties of superfine SnO2 powders were distigated. Through the analysis of experimental results, the conclusions are shown the stronger the alkalinity of the auxiliary agent, the larger the grain size of the obtained particles and the more uniform the particles. When the molar ratio of salt to alkali is more than 1: 4, the amount of alkali is gradually reduced, the particle size is small, the morphology is not uniform and easy to agglomerate. When the molar ratio of salt to alkali is 1: 4, the smaller particle size is shown, the appearance morphology is uneven. The longer the reaction time, the more complete the grain, the more uniform the morphology. Under the condition of SnCl4 concentration of 0.05mol/L, reaction time is 4 days, salt and alkali molar ratio is 1: 4, holding temperature is 200°C, the auxiliary agent is NaOH, the size, shape and performance of synthesized SnO2 are the better.

scholarly journals Synthesis and Performance ofN-(Benzoyl) Stearic Acid Hydrazide

2012 ◽  
Vol 9 (2) ◽  
pp. 545-552 ◽  
Author(s):  
Yan-Hua Cai ◽  
Shun-Jiang Li
Keyword(s):  
Reaction Time ◽  
Stearic Acid ◽  
Reaction Temperature ◽  
Orthogonal Experiment ◽  
Acid Hydrazide ◽  
Semiempirical Method ◽  
Molar Ratio ◽  
H Nmr ◽  
And Performance ◽  
Benzoyl Hydrazine

N-(benzoyl) stearic acid hydrazide was synthesized from benzoyl hydrazine and stearyl chloride which was deprived from stearic acid via acylation. The structure of the compound had been characterized by FT-IR,1H NMR, at the same time, the structure of N-(benzoyl) stearic acid hydrazide was optimized by the semiempirical method PM3. The influence of the reaction ratio, reaction time and reaction temperature to the yield ofN-(benzoyl) stearic acid hydrazide was investigated by orthogonal experiment, and the optimized reaction condition was molar ratio of benzoyl hydrazine: stearyl chloride 1:1, reaction time 6 h, reaction temperature 70°C, and the yield was 92.9%. The TGA thermal analysis of N-(benzoyl) stearic acid hydrazide showed that thermal stability ofN-(benzoyl) stearic acid hydrazide was affected by heating rate, and theN-(benzoyl) stearic acid hydrazide enhanced the tensile strength, modulus and elongation at break of Poly(L-lactic acid)(PLLA).

Ultrasonic Synthesis and Properties of Sodium Lignosulfonate-grafted Poly(Acrylic Acid-co-Vinyl Alcohol) Composite Superabsorbent Polymer

2016 ◽  
Vol 69 (10) ◽  
pp. 1155 ◽  
Author(s):  
Chen Hao ◽  
Jun Li ◽  
Qiang He ◽  
Zilong Zhou ◽  
Xiaowei Guo ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Vinyl Alcohol ◽  
High Efficiency ◽  
Orthogonal Experiment ◽  
Physiological Saline ◽  
Water Absorbency ◽  
Superabsorbent Polymer ◽  
Sodium Lignosulfonate ◽  
Scanning Calorimetry ◽  
Poly Acrylic Acid

In this paper, a green and high-efficiency method (ultrasound synthesis) has been applied in the preparation of a sodium lignosulfonate-grafted poly(acrylic acid-co-vinyl alcohol) superabsorbent polymer (SL-P(AA-co-VA)). By Fourier-transform infrared spectroscopy, scanning electron microscopy, and thermogravimetry–differential scanning calorimetry, the successful preparation was confirmed. An L16(4)5 orthogonal experiment was carried out to optimize synthetic conditions for SL-P(AA-co-VA). Under the optimized synthetic conditions, maximum water absorbency (949 g g–1) and physiological saline absorbency (62 g g–1) were achieved. Adjusting pH reduces the water absorbency of SL-P(AA-co-VA), as does the presence of metal ions. However, a rise in temperature does not have a significant influence on it. In general, both the water absorbency and physiological saline absorbency of SL-P(AA-co-VA) were significantly improved versus P(AA-co-VA) superabsorbent.

Mix Ratio Design and Performance Optimization of Vitrified Microsphere Insulating Mortar

2012 ◽  
Vol 476-478 ◽  
pp. 1639-1642
Author(s):  
Jin Ping Chen
Keyword(s):  
Performance Optimization ◽  
Raw Materials ◽  
Orthogonal Experiment ◽  
Polypropylene Fiber ◽  
Physical And Mechanical Properties ◽  
Dry Density ◽  
Building Insulation ◽  
Composition Materials ◽  
New Type ◽  
And Performance

Vitrified microsphere insulation mortar is a new type building insulation mortar which developed in recent years, with having the advantages of well workability, high intensity and fire prevention. But because the vitrified microsphere we use of which much exists on the defects of high dry density and bad insulation effect, it analyzed deeply kinds of factors which influence on the physical and mechanical properties of vitrified microsphere insulation mortar, making use of orthogonal experiment to optimize the composition materials of insulation mortar. The orthogonal test results show that the most influential raw materials factors to mortar insulation properties and 28d compressive strength followed by aggregate, polypropylene fiber, fly ash and latex powder.

Research on Multifunctional Characteristics and Application of Ultralight Porous Metal Materials Based on Structured

2020 ◽  
Vol 1001 ◽  
pp. 67-72
Author(s):  
Qi Fei Du ◽  
Xu Guo Huai
Keyword(s):  
Porous Metal ◽  
Porous Metals ◽  
Excellent Performance ◽  
Engineering Material ◽  
Functional Characteristics ◽  
New Type ◽  
Metal Materials ◽  
Increasing Demand ◽  
And Performance ◽  
Performance Research

With the continuous development of Chinese science and technology, structured ultra-light porous metal materials are a new type of multifunctional materials that have emerged with the increasing demand for diverse materials preparation and machining technologies in recent years. New topics in feature and performance research. In the field of material manufacturing and machining, ultra-light porous metal materials have appeared. Ultralight porous metal materials have many functional characteristics. As a new type of material that is different from dense materials, porous metal materials are the first to explain the concept of ultralight porous metal materials and the functional characteristics of ultralight porous metal materials. Analysis, and finally the specific application of ultralight porous metal materials is studied. Structured ultralight porous metals are a multifunctional engineering material with excellent performance, have good application prospects, and have become the focus of attention and research.

scholarly journals Preparation and Performance Research of Magnetic Polymer Microspheres

2021 ◽  
Vol 2085 (1) ◽  
pp. 012029
Author(s):  
Yibing Peng ◽  
Qiurong Li
Keyword(s):  
Acrylic Acid ◽  
Magnetic Core ◽  
Polymer Microspheres ◽  
Composite Microspheres ◽  
Acid Copolymer ◽  
Acrylic Acid Copolymer ◽  
And Performance ◽  
Performance Research ◽  
Polymerization Method ◽  
Shell Composite

Abstract In this thesis, polystyrene magnetic polymer microspheres with good monodispersity and carboxyl functional groups were prepared. The adsorption properties of styrene-acrylic acid magnetic polymer microspheres to bovine serum albumin have been studied.. Using Fe3O4 magnetic fluid as the magnetic core and styrene-acrylic acid copolymer as the polymer shell, composite microspheres with very small particle diameters were prepared by the dispersion polymerization method.

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