Preparation and Performance Study of Fluorosilicone Oligomer Anti-Sticking Coatings

2020 ◽  
Vol 841 ◽  
pp. 209-213
Author(s):  
Dong Bo Guan ◽  
Xiao Jie Zhai ◽  
Ying Nan Biansai ◽  
Bo Jun Cao ◽  
Yong Fu Zhu ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Contact Angle ◽  
Infrared Spectroscopy ◽  
Contact Time ◽  
Curing Agent ◽  
Performance Study ◽  
Film Forming ◽  
Increasing Trend ◽  
Before And After ◽  
And Performance

In this paper, fluorosilicone oligomer and its curing agent are used as the main film-forming materials, and fluorosilicone POSS is added to reduce the surface energy of the composites to prepare a coating with certain anti-sticking effect. The changes of molecular structure before and after the reaction were obtained by infrared spectroscopy. The contact angle and anti-sticking property of the coating surface were studied by changing the content of POSS containing fluorine. It was found that the contact angle of fluorine-containing POSS reached 98.7° when the content of fluorine-containing POSS was 3 Wt.%. With the increase of POSS content, the anti-sticking force of composites changed little, but with the increase of the contact time of tape, the anti-sticking force showed an increasing trend.

Structural Design and Performance Study of Parallel Metamorphic Mechanism Based on Screw System Theory

2014 ◽  
Vol 527 ◽  
pp. 162-166
Author(s):  
Sheng Hai Hu ◽  
Hong Guang Wang ◽  
Ting Ting Xie ◽  
Tian Shi Sun
Keyword(s):  
System Theory ◽  
Degrees Of Freedom ◽  
Kinematic Pair ◽  
Performance Study ◽  
Cutting Mechanism ◽  
Metamorphic Mechanism ◽  
Before And After ◽  
New Type ◽  
Branched Chain ◽  
And Performance

A new type of metamorphic kinematic pair is designed according to the traditional kinematic pair, and further a novel parallel metamorphic cutting mechanism is designed. Based on screw system theory the constraints of structure branched chain on the end of the moving platform are analyzed before and after transformation, and then the degrees of freedom of the novel parallel metamorphic cutting mechanism is calculated, and the exact axis that the mechanism rotates across can also be obtained.

Preparation and Performance Study of Reflection Heat Preservation Insulation Coating

2010 ◽  
Vol 150-151 ◽  
pp. 620-625 ◽  
Author(s):  
Su Zhao ◽  
Li Yuan Qiu ◽  
Shuang Liu
Keyword(s):  
Titanium Dioxide ◽  
Orthogonal Experimental Design ◽  
Hollow Glass Microsphere ◽  
Performance Study ◽  
Acrylic Emulsion ◽  
Film Forming ◽  
Insulation Coating ◽  
And Performance ◽  
Heat Preservation ◽  
Rutile Titanium Dioxide

The influence of film forming matter to heat preservation insulation coating reflectivity was studied. Organosilicon modified styrene-acrylic emulsion was selected as film forming matter through the infrared spectrum test. The influence of several kinds of pigment and filler to reflectivity was studied by orthogonal experimental design . Importance of factors from large to small in turn is: Rutile titanium dioxide> Kaolin> expanded perlite、hollow glass microsphere> iron oxide red, and the formula of pigment and filler was determined .The influence of rutile titanium dioxide to reflectivity was studied, the reflectivity of coating is superior when rutile titanium dioxide grain size is in the range between 0.130 m and 0.136 m. Film thickness has certain influence to reflectivity ,when the thickness is 0.062cm, the reflectivity of coating reaches the highest,is 73.28%.

scholarly journals Membrane module autopsy used in the reverse osmosis process

2020 ◽  
pp. 9-19
Author(s):  
Jesús Álvarez-Sánchez ◽  
Alma Delia Santacruz-Mungarro ◽  
Germán Eduardo Dévora-Isiordia ◽  
Maria del Rosario Martínez-Macias
Keyword(s):  
Contact Angle ◽  
Atomic Force Microscopy ◽  
Infrared Spectroscopy ◽  
Cross Flow ◽  
Membrane Module ◽  
Attenuated Total Reflectance ◽  
Total Reflectance ◽  
Force Microscopy ◽  
Atomic Force ◽  
And Performance

This research was done to get acquainted with the characteristic of the membrane module in spiral, used in the osmosis reverse process. The goal to know its measure, components, hydrophilic, topography, materials and performance. The membranes of the module were characterized by the next techniques: atomic force microscopy (AFM), infrared spectroscopy by ATR (Attenuated Total Reflectance), contact angle and cross- flow equipment. Agree with the autopsy, the infrared spectrums indicate that the membrane is constituted by support of polyester paper, a polysulfone layer, a cellulose acetate layer and polyamide layer. The feed spacer is polypropylene and the permeate spacer is polyethylene terephthalate. All the measures did the membrane module were the same as the technical sheet from the manufacturer. The contact angle was 22.4±3.55° and roughness of 182.43±42 nm. The performance of the membrane was 70% to reject salts of feed 1000 ppm Na2SO4.

Replication of the Superstition and Performance Study by

2014 ◽  
Vol 45 (3) ◽  
pp. 239-245 ◽  
Author(s):  
Robert J. Calin-Jageman ◽  
Tracy L. Caldwell
Keyword(s):  
Task Difficulty ◽  
Statistical Power ◽  
Meta Analysis ◽  
A Priori ◽  
Significant Heterogeneity ◽  
Performance Study ◽  
Improve Performance ◽  
Research Designs ◽  
Series Of Experiments ◽  
And Performance

A recent series of experiments suggests that fostering superstitions can substantially improve performance on a variety of motor and cognitive tasks ( Damisch, Stoberock, & Mussweiler, 2010 ). We conducted two high-powered and precise replications of one of these experiments, examining if telling participants they had a lucky golf ball could improve their performance on a 10-shot golf task relative to controls. We found that the effect of superstition on performance is elusive: Participants told they had a lucky ball performed almost identically to controls. Our failure to replicate the target study was not due to lack of impact, lack of statistical power, differences in task difficulty, nor differences in participant belief in luck. A meta-analysis indicates significant heterogeneity in the effect of superstition on performance. This could be due to an unknown moderator, but no effect was observed among the studies with the strongest research designs (e.g., high power, a priori sampling plan).

Pilot-scale neutralisation of underground mine water

1996 ◽  
Vol 34 (10) ◽  
pp. 141-149 ◽  
Author(s):  
J. P. Maree ◽  
G. J. van Tonder ◽  
P. Millard ◽  
T. C. Erasmus
Keyword(s):  
Mine Water ◽  
Contact Time ◽  
Pilot Scale ◽  
Underground Water ◽  
Underground Mine ◽  
Economic Feasibility ◽  
Fluidised Bed ◽  
Chemical Composition Of Water ◽  
Before And After ◽  
Time Required

Traditionally acid mine water is neutralised with lime (Ca(OH)2). Limestone (CaCO3) is a cheaper alternative for such applications. This paper describes an investigation aimed at demonstrating that underground mine water can be neutralised with limestone in a fluidised-bed. The contact time required between the limestone and the acid water, chemical composition of water before and after treatment, and economic feasibility of the fluidised bed neutralisation process are determined. A pilot plant with a capacity of 10k1/h was operated continuously underground in a gold mine. The underground water could be neutralised effectively using the limestone process. The pH of the water was increased from less than 3 to more than 7, the alkalinity of the treated water was greater than 120 mg/l (as CaCO3) and the contact time required between mine water and limestone was less than 10 min (the exact contact time depends on the limestone surface area). Chemical savings of 56.4% can be achieved compared to neutralisation with lime.

ELIXIR TO EXAMINATION STRESS AMONG STUDENT - STUDY SKILLS TRAINING AND SYSTEMATIC DESENSITIZATION

2018 ◽  
Vol 6 (26) ◽  
Author(s):  
Jyoti Baijal
Keyword(s):  
Study Skills ◽  
Knowledge Society ◽  
Skills Training ◽  
Well Being ◽  
Systematic Desensitization ◽  
Performance Study ◽  
High Stakes ◽  
Deficit Model ◽  
Examination Stress ◽  
And Performance

Examination stress is a ubiquitous phenomenon that has, in the present times, adversely affected the learning outcomes and performance of the students at all levels- primary, secondary or higher education. It’s increasing intensity specifically among students appearing for high stakes board examination evokes a response from the teaching fraternity at the earliest. The reason being that a prolonged experience of stress with respect to evaluative situations is bound to prove detrimental to the mental, physical and emotional well-being of the students. For the nation to develop and progress towards a knowledge society, it is imperative that the students are taught to cope with stressful stimuli and improve performance. Study-Skills Training is an intervention intended to improve their study and test- taking habits and skills. It is based on a cognitive-deficit model which is directed towards improving a variety of cognitive activities that affect the organization, processing and retrieval of information and thereby help in reducing the experience of examination stress. Systematic desensitization as a process can be used to unlearn anxiety reactions by replacing the anxiety response with a calm, relaxed state. Thus, a combination of study-skills training and systematic desensitization has been shown to be effective and superior in alleviating test anxiety

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