scholarly journals Influence of Hydrophobicity of Backbone Polymer in Thermo-Responsive Hydrogel with Immobilized Amine on Cycle Capacity for Absorption and Recovery of CO2

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1024
Author(s):  
Yuma Nagasawa ◽  
Yoshimi Seida ◽  
Takehiko Gotoh ◽  
Eiji Furuya
Keyword(s):  
Energy Consumption ◽  
Polymer Network ◽  
Polymer Networks ◽  
Recovery Process ◽  
Solution Temperature ◽  
Adsorption Model ◽  
Recovery Method ◽  
Desorption Temperature ◽  
Co2 Desorption ◽  
Recovery System

The chemisorption process with amines is the major separation and recovery method of CO2 because of its high processing capacity and simplicity. However, large energy consumption for the desorption of CO2 is also associated with the process. To develop a separation and recovery process that is capable of desorbing CO2 at low temperatures and with minimal energy consumption, polymer hydrogels with a lower critical solution temperature (LCST) polymer network and amine groups immobilized in the polymer network of the hydrogels were exploited. Thermo-responsive amine gels with a series of hydrophobicity of polymer networks were systematically synthesized, and the influence of the hydrophobicity of the gels on the CO2 desorption temperature and cycle capacity (CO2 amount that can be separated and recovered by 1 cycle of temperature swing operation) was investigated using slurries with the series of gels. A significant decrease in the CO2 desorption temperature and increase in the cycle capacity occurred simultaneously by lowering the LCST of the gels via hydrophobisation of the polymer network. Based on an equilibrium adsorption model representing the CO2 separation and a recovery system with the gel slurries, an analysis of the system dynamics was performed in order to understand the recovery mechanism in the process.

scholarly journals Parameter Research of UAV Vertical Rope-type Recovery System

2018 ◽  
Vol 179 ◽  
pp. 03001
Author(s):  
Chengjing Ma ◽  
Xing'an Liu ◽  
Caiwen Zhang
Keyword(s):  
Simulation Analysis ◽  
Initial Conditions ◽  
Recovery Process ◽  
Resistance Force ◽  
Recovery Method ◽  
Recovery System ◽  
Recovery Performance ◽  
Stiffness And Damping Coefficient ◽  
Stiffness And Damping ◽  
Type Recovery

Vertical rope-type recovery system is a new accurate recovery method for small fixed-wing unmanned aerial vehicles (UAV). This paper models the recovery system and finishes the simulation of recovery process. The recovery stand model of the recovery system is built by analyzing the physical essence, and the aircraft model is based on dynamics and kinematics equations as well as the mechanical characteristics of arresting rope. Finally the simulation analysis of the recovery process is completed. On the basis of the modeling simulation, the system parameters’ effect on recovery performance such as maximum resistance force, maximum overload and maximum radius has been discussed by varying each key parameter. Eventually, the pattern of how initial conditions when hitting the rope as well as the arresting rope’s stiffness and damping coefficient influence recovery performance has been researched, and the result could provide theoretical reference for the design of UAV using vertical rope-type recovery and the system in the future.

Triple-Shape Capability of Thermo-sensitive Nanocomposites from Multiphase Polymer Networks and Magnetic Nanoparticles

2009 ◽  
Vol 1190 ◽  
Author(s):  
Narendra Kumar Uttamchand ◽  
Karl Kratz ◽  
Marc Behl ◽  
Andreas Lendlein
Keyword(s):  
Polymer Network ◽  
Polymer Networks ◽  
Recovery Process ◽  
Tensile Tests ◽  
Monomethyl Ether ◽  
Shape Effect ◽  
Contact Activation ◽  
Thermal Transitions ◽  
Two Phase ◽  
Thermally Induced

AbstractThermo-sensitive multiphase polymer networks with triple-shape capability have been recently introduced as a new class of active polymers that can change on demand from a first shape A to a second shape B and from there to a permanent shape C. Such multiphase polymer networks consist of covalent cross-links that determine shape C and at least two phase-segregated domains with distinct thermal transitions Ttrans,A and Ttrans,B , that are associated to shape A and B. In general the application of a two step programming or a one step programming procedure is required for creation of triple-shape functionality. In this study we report about a series of CLEGC nanocomposites consisting of silica coated nanoparticles (SNP) incorporated in a multiphase graft polymer network matrix from crystallisable poly(ε-caprolactone) diisocyanatoethyl methacrylate (PCLDIMA) and poly(ethylene glycol) monomethyl ether monomethacrylate (PEGMA) forming crystallisable side chains. These CLEGC nanocomposites were designed to enabling non contact activation of triple-shape effect in alternating magnetic field. Composites with variable PCLDIMA content ranging from 30 wt-% and 70 wt-% and different SNP amounts (0 wt-%, 2.5 wt-%, 5 wt-% and 10 wt-%) were realized by thermally induced polymerization. The thermal and mechanical properties of the CLEG nanocomposites were explored by means of DSC, DMTA and tensile tests. The triple-shape properties were quantified in cyclic, thermomechanical experiments, which consisted of a two step programming procedure and a recovery module under stress-free conditions for recovery of shapes B and C. While the thermal properties and the Young’s modulus of the investigated polymer networks were found to be independent from the incorporated amount of SNP, the elongation at break (εB) decreases with increasing nanoparticle content. All investigated composites exhibit excellent triple-shape properties showing a well separated two step shape recovery process.

Direct characterization of a polymer network through its retainable units

2019 ◽  
Vol 10 (35) ◽  
pp. 4837-4843
Author(s):  
Xiaoyan Xu ◽  
Qi Wang
Keyword(s):  
Polymer Network ◽  
Polymer Networks ◽  
Quantitative Characterization

A partially decrosslinkable network provides a general protocol for full, direct and quantitative characterization of polymer networks through its retainable units.

Error Recovery System Encoder/Decoder Method and VHDL Design for Saving Memory of Embedded System

2011 ◽  
Vol 110-116 ◽  
pp. 4985-4991
Author(s):  
Byung Joon Kim ◽  
Rae Cho Sung ◽  
Sung Ho Jin
Keyword(s):  
Embedded System ◽  
Error Correction ◽  
Recovery Process ◽  
Error Recovery ◽  
Correction Method ◽  
Memory Space ◽  
Rs Code ◽  
Error Correction Method ◽  
Recovery System ◽  
System Errors

Unexpected errors may occur in any embedded systems. An error correction circuitry is used to prevent system errors. Parity bits generated from an encoder are needed to perform an error recovery process. Therefore, to be stored in the memory space should be added. In this paper, Parity bits to be stored without a memory space that can be used to error correction circuitry are proposed. The proposed method was designed in VHDL. The proposed design used the Reed-Solomon (RS) code of an error correction method. Then, 8 bits of information symbols and a symbol error correcting RS code were designed based on the design.

Reducing energy consumption of CO2 desorption in CO2-loaded aqueous amine solution using Al2O3/HZSM-5 bifunctional catalysts

2018 ◽  
Vol 229 ◽  
pp. 562-576 ◽  
Author(s):  
Xiaowen Zhang ◽  
Helei Liu ◽  
Zhiwu Liang ◽  
Raphael Idem ◽  
Paitoon Tontiwachwuthikul ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Bifunctional Catalysts ◽  
Amine Solution ◽  
Co2 Desorption ◽  
Reducing Energy

scholarly journals Polymer network-derived nitrogen/sulphur co-doped three-dimensionally interconnected hierarchically porous carbon for oxygen reduction, lithium-ion battery, and supercapacitor

RSC Advances ◽  
2019 ◽  
Vol 9 (63) ◽  
pp. 36570-36577 ◽  
Author(s):  
Zili Xu ◽  
Fangfang Zhang ◽  
Weiran Lin ◽  
Haining Zhang
Keyword(s):  
Porous Carbon ◽  
Large Scale ◽  
Polymer Network ◽  
Polymer Networks ◽  
Lithium Ion ◽  
Scale Production ◽  
Hierarchical Porous Carbon ◽  
Large Scale Production ◽  
Hierarchical Porous ◽  
Co Doped

Polymer networks are efficient precursors for large scale production of hierarchical porous carbon.

Eosin Y functionalized tertiary amine-bearing interpenetrating polymer networks for heterogeneous catalysis of logic-controlled oxygen-tolerant radical polymerization

2020 ◽  
Vol 8 (47) ◽  
pp. 25363-25370
Author(s):  
Xue Li ◽  
Yu Chi Zhang ◽  
Sunjie Ye ◽  
Xi Rong Zhang ◽  
Tao Cai
Keyword(s):  
Heterogeneous Catalysis ◽  
Radical Polymerization ◽  
Tertiary Amine ◽  
Heterogeneous Catalysts ◽  
Polymer Network ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Interpenetrating Polymer Network ◽  
Eosin Y

Given the scalability and vast applicability of the heterogeneous catalysts and the burgeoning interests in biorelated applications, the interpenetrating polymer network catalysts will facilitate the realization of green, precise and efficient polymerization.

scholarly journals A Guide through the Dental Dimethacrylate Polymer Network Structural Characterization and Interpretation of Physico-Mechanical Properties

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4057 ◽  
Author(s):  
Izabela Maria Barszczewska-Rybarek
Keyword(s):  
Mechanical Properties ◽  
Chemical Structure ◽  
Structural Parameters ◽  
Polymer Network ◽  
Polymer Networks ◽  
Impact Resistance ◽  
Organic Matrices ◽  
Dental Restorative

Material characterization by the determination of relationships between structure and properties at different scales is essential for contemporary material engineering. This review article provides a summary of such studies on dimethacrylate polymer networks. These polymers serve as photocuring organic matrices in the composite dental restorative materials. The polymer network structure was discussed from the perspective of the following three aspects: the chemical structure, molecular structure (characterized by the degree of conversion and crosslink density (chemical as well as physical)), and supramolecular structure (characterized by the microgel agglomerate dimensions). Instrumental techniques and methodologies currently used for the determination of particular structural parameters were summarized. The influence of those parameters as well as the role of hydrogen bonding on basic mechanical properties of dimethacrylate polymer networks were finally demonstrated. Mechanical strength, modulus of elasticity, hardness, and impact resistance were discussed. The issue of the relationship between chemical structure and water sorption was also addressed.

Crosslinking, Filler, or Transition Constraint of Polymer Networks. I

1971 ◽  
Vol 44 (5) ◽  
pp. 1208-1226
Author(s):  
A. F. Blanchard
Keyword(s):  
Molecular Weight ◽  
Polymer Network ◽  
Polymer Networks ◽  
Physical Measurements ◽  
Polymer Fraction

Abstract For a polymer network at equilibrium in solvent, Flory and Rehner related the polymer fraction νr of the swollen volume to the molecular weight Mc of the chains between crosslinks. Their equation is represented below by the function F(νr) with [Mc] denoting the effective mesh weight, i.e., that obtained by physical measurements. Hence the effective crosslinking 1/[Mc]g from swelling measurements νr is given by 1/F(νr).

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