scholarly journals Short-Branched Fluorinated Polyurethane Coating Exhibiting Good Comprehensive Performance and Potential UV Degradation in Leather Waterproofing Modification

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 395
Author(s):  
Shouhua Su ◽  
Juan Wang ◽  
Chao Li ◽  
Jinfeng Yuan ◽  
Zhicheng Pan ◽  
...  
Keyword(s):  
Wear Resistance ◽  
High Performance ◽  
High Wear Resistance ◽  
Polyurethane Coating ◽  
Uv Degradation ◽  
Broad Application ◽  
Fluorinated Polyurethane ◽  
Comprehensive Performance ◽  
Novel Strategy ◽  
Application Prospects

In the current leather market, waterproof leather occupies a large proportion, where waterproofness has become one of the important standards for leather selection. However, the most advanced fluorine-containing waterproofing agents on the market always have long chains of over eight carbons (C8), whose use has been restricted due to their bioaccumulation and recalcitrance in natural environment. Consequently, creating waterproof materials characterized by their environmentally friendly qualities and high performance is of great significance. Herein, we report a novel strategy for preparation of the fluorinated polyurethanes containing short branched fluorocarbon chains, and apply it in leather waterproofing. Because the fluorine-containing chain segments are enriched on the coating surface, the waterproof agent coating shows good hydrophobicity, low water absorption, high wear resistance and potential photodegradation of performances. Additionally, the water and oil proof performances of the coating are comparable to that of the marketed C8 waterproofing agent. Its solvent-resistant and antifouling performances are also outstanding. Therefore, the coating can meet the property requirements for daily use and has broad application prospects.

Study on Full-Slag Concrete Feasibility

2012 ◽  
Vol 535-537 ◽  
pp. 1682-1685
Author(s):  
Tie Jun Chen
Keyword(s):  
Wear Resistance ◽  
Slag Composition ◽  
High Performance ◽  
Water Resistance ◽  
Steel Slag ◽  
High Wear Resistance ◽  
Cement Concrete ◽  
Slag Cement ◽  
Slag Powder ◽  
Steel Slag Powder

In this paper, of the slag composition, stability and slag particles indicators of concrete performance, demonstrated use of steel slag to do the Complete Works of material, steel slag powder admixture with high wear resistance, water resistance slag cement preparationthe feasibility of high-performance cement concrete.

scholarly journals Correlation between Wear Resistance and Lifetime of Electrical Contacts

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Jian Song ◽  
Christian Koch ◽  
Liangliang Wang
Keyword(s):  
Electrical Conductivity ◽  
Wear Resistance ◽  
High Performance ◽  
Electrical Contacts ◽  
Electrical Performance ◽  
High Wear Resistance ◽  
High Electrical Conductivity ◽  
Fretting Corrosion ◽  
Long Lifetime

Electrical contacts are usually plated in order to prevent corrosion. Platings of detachable electrical contacts experience wear because of the motion between contacts. Once the protecting platings have been worn out, electrical contacts will fail rapidly due to corrosion or fretting corrosion. Therefore the wear resistance of the platings is a very important parameter for the long lifetime of electrical contacts. Many measures which improve the wear resistance can diminish the conductivity of the platings. Due to the fact that platings of electrical contacts must have both a high wear resistance and a high electrical conductivity, the manufacturing of high performance platings of electrical contacts poses a great challenge. Our study shows firstly the correlation between the wear resistance of platings and lifetime of electrical contacts and then the measures, which improve the wear resistance without impairing the electrical performance of the contacts.

Preparation of Carbon Nanotube / Polymer Composites

2012 ◽  
Vol 557-559 ◽  
pp. 478-482
Author(s):  
Yong Peng Yu
Keyword(s):  
Composite Materials ◽  
Polymer Composite ◽  
High Performance ◽  
Raw Materials ◽  
High Tech ◽  
Broad Application ◽  
Great Progress ◽  
Actual Operation ◽  
Information Materials ◽  
Application Prospects

Due to the unique properties of CNTs its own scientists called a "super fiber" has an attractive prospect in the high-tech fields. In recent years, the research center of gravity of the CNTs composites have been transferred to the polymer / CNTs composite materials, and has made great progress. CNTs and polymer composite, CNTs from nanometer to the actual operation of an effective and efficient use of the unique properties of CNTs can be achieved with the advantage of raw materials to complement or strengthen. Polymer composite materials have broad application prospects in information materials, biomedical materials, high-performance structural materials, multifunctional materials.

scholarly journals Isolation, Optimization of Fermentation Conditions, and Characterization of an Exopolysaccharide from Pseudoalteromonas agarivorans Hao 2018

Marine Drugs ◽  
2019 ◽  
Vol 17 (12) ◽  
pp. 703
Author(s):  
Lujiang Hao ◽  
Wenlin Liu ◽  
Kai Liu ◽  
Kai Shan ◽  
Chunlei Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Sodium Hyaluronate ◽  
Oh Radical ◽  
Biological Functions ◽  
Fermentation Conditions ◽  
Broad Application ◽  
Adsorption Rates ◽  
Optimization Of Fermentation ◽  
Application Prospects

In recent years, the wide application of exopolysaccharides (EPSs) in food, cosmetics, medicine, and other fields has drawn tremendous attention. In this study, an EPS produced by Pseudoalteromonas agarivorans Hao 2018 was isolated and purified, and its fermentation conditions were optimized. Its structure and biological functions were also studied. The purity and molecular weight of EPS were determined by high performance liquid chromatography (HPLC), and the EPS exhibited a number average of 2.26 × 105 and a weight average of 2.84 × 105. EPS has good adsorption for Cu2+ and Pb2+. The adsorption rates can reach up to 69.79% and 82.46%, respectively. The hygroscopic property of EPS was higher than that of chitosan, but slightly lower than that of sodium hyaluronate. However, the water-retaining activity of EPS was similar to that of chitosan and sodium hyaluronate. EPS has strong ability to scavenge free radicals, including OH radical and O2− radical. Further, its activity on O2− radicals has similarities with that of vitamin C. EPS has broad application prospects in many fields, such as cosmetics, environmental protection.

BÖHLER S590 MICROCLEAN

Alloy Digest ◽  
2018 ◽  
Vol 67 (8) ◽  
Keyword(s):  
Wear Resistance ◽  
Compressive Strength ◽  
Physical Properties ◽  
Dimensional Stability ◽  
High Speed ◽  
High Performance ◽  
High Speed Steel ◽  
Heat Treating ◽  
High Wear Resistance ◽  
Powder Metal

Abstract Böhler (or Boehler) S590 is a high-speed steel with high-wear resistance, high-compressive strength, very good through-hardening properties, good toughness, good dimensional stability on heat treat, and very good temper resistance. This datasheet provides information on composition, physical properties, and hardness. It also includes information on wear resistance as well as forming, heat treating, machining, and powder metal forms. Filing Code: TS-752. Producer or source: Voestalpine High Performance Metals Corporation.

OLIN C197

Alloy Digest ◽  
1999 ◽  
Vol 48 (1) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Wear Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Performance ◽  
Corrosion And Wear ◽  
Contact Forces ◽  
High Current ◽  
Lower Strength ◽  
Current Carrying Capability

Abstract Olin C197 is a second-generation high performance alloy developed by Olin Brass. It has a strength and bend formability similar to C194 (see Alloy Digest Cu-360, September 1978), but with 25% higher electrical and thermal conductivity. High conductivity allows C197 to replace brasses and bronzes in applications where high current-carrying capability is required. Also, the strength of C197 provides higher contact forces when substituted for many lower strength coppers. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion and wear resistance as well as forming and joining. Filing Code: CU-627. Producer or source: Olin Brass.

LUCEFIN GROUP 16MnCr5 (1.7131), 16MnCrS5 (1.7139)

Alloy Digest ◽  
2020 ◽  
Vol 69 (8) ◽  
Keyword(s):  
Wear Resistance ◽  
Fatigue Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
High Wear Resistance ◽  
Medium Size ◽  
Case Hardening ◽  
Low Carbon

Abstract Lucefin Group 16MnCr5 and 16MnCrS5 are low-carbon, 1.2Mn-1Cr, alloy case-hardening steels that are used in the carburized or carbonitrided, and subsequently quench hardened and tempered condition. In general, these steels are used for small and medium size parts requiring high wear resistance and fatigue strength. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-864. Producer or Source: Lucefin S.p.A.

AIR-4

Alloy Digest ◽  
1963 ◽  
Vol 12 (2) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Tool Steel ◽  
Heat Treating ◽  
High Wear Resistance ◽  
Bethlehem Steel Corporation ◽  
Steel Corporation ◽  
Machining Characteristics

Abstract BETHLEHEM AIR-4 is a medium alloy air-hardening tool steel having low deformation, high wear resistance and hardness, deep hardening properties and adequate toughness for severe service. It has excellent free-machining characteristics. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-129. Producer or source: Bethlehem Steel Corporation.

BÖHLER M261 EXTRA

Alloy Digest ◽  
2015 ◽  
Vol 64 (12) ◽  
Keyword(s):  
Wear Resistance ◽  
Physical Properties ◽  
Compressive Stress ◽  
Precipitation Hardening ◽  
Heat Treating ◽  
Steel Grade ◽  
High Wear Resistance ◽  
Hardened Condition

Abstract Böhler (or Boehler) M261 Extra is a precipitation hardening steel grade for plastic molds with good machinability in the precipitation hardened condition. It is used in the processing of plastics by offering high compressive stress and high wear resistance. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on heat treating and machining. Filing Code: TS-732. Producer or source: Böhler Edelstahl GmbH & Company KG. See also Alloy Digest TS-736, September 2016.

YSS HAP72

Alloy Digest ◽  
2019 ◽  
Vol 68 (10) ◽  
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Tool Steel ◽  
High Speed ◽  
High Wear Resistance ◽  
Bend Strength ◽  
Temperature Performance ◽  
Very High

Abstract YSS HAP72 is a powder metallurgy high-speed tool steel with a very high wear resistance. This datasheet provides information on composition, hardness, and bend strength. It also includes information on high temperature performance. Filing Code: TS-779. Producer or source: Hitachi Metals America Ltd.

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