Hierarchical porous 4A zeolites as a smoke suppressant for ammonium polyphosphate-treated wood composites: Role of mesopore diameter

2021 ◽  
pp. 111191
Author(s):  
Shaodi Zhang ◽  
Tiantian Yang ◽  
Li Li ◽  
Mingzhi Wang
Keyword(s):  
Treated Wood ◽  
Ammonium Polyphosphate ◽  
Wood Composites ◽  
Smoke Suppressant ◽  
Hierarchical Porous

Hierarchical porous composites derived from coal gasification fine slag for CO2 capture: Role of slag particles in the composites

Fuel ◽  
2021 ◽  
pp. 122334
Author(s):  
Zekai Miao ◽  
Jie Xu ◽  
Liqing Chen ◽  
Rumeng Wang ◽  
Yixin Zhang ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Coal Gasification ◽  
Hierarchical Porous ◽  
Porous Composites

Hierarchical Porous Aluminophosphate-Treated Wood for High-Efficiency Solar Steam Generation

2020 ◽  
Vol 12 (17) ◽  
pp. 19511-19518 ◽  
Author(s):  
Tingjie Chen ◽  
Zhenzeng Wu ◽  
Zhiyong Liu ◽  
John Tosin Aladejana ◽  
Xiaodong (Alice) Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Treated Wood ◽  
Steam Generation ◽  
Hierarchical Porous ◽  
Solar Steam Generation

scholarly journals Hierarchical Porous Polyamide 6 by Solution Foaming: Synthesis, Characterization and Properties

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1310 ◽  
Author(s):  
Liang Wang ◽  
Yu-Ke Wu ◽  
Fang-Fang Ai ◽  
Jie Fan ◽  
Zhao-Peng Xia ◽  
...  
Keyword(s):  
Large Scale ◽  
Polyamide 6 ◽  
Solution Concentration ◽  
The Novel ◽  
Foaming Agent ◽  
Hierarchical Porous ◽  
Wide Range ◽  
The Mean ◽  
Novel Strategy

Porous polym er materials have received great interest in both academic and industrial fields due to their wide range of applications. In this work, a porous polyamide 6 (PA6) material was prepared by a facile solution foaming strategy. In this approach, a sodium carbonate (SC) aqueous solution acted as the foaming agent that reacted with formic acid (FA), generating CO2 and causing phase separation of polyamide (PA). The influence of the PA/FA solution concentration and Na2CO3 concentration on the microstructures and physical properties of prepared PA foams were investigated, respectively. PA foams showed a hierarchical porous structure along the foaming direction. The mean pore dimension ranged from hundreds of nanometers to several microns. Low amounts of sodium salt generated from a neutralization reaction played an important role of heterogeneous nucleation, which increased the crystalline degree of PA foams. The porous PA materials exhibited low thermal conductivity, high crystallinity and good mechanical properties. The novel strategy in this work could produce PA foams on a large scale for potential engineering applications.

The role of soft colloidal templates in the shape evolution of flower-like MgAl-LDH hierarchical microstructures

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 29757-29765 ◽  
Author(s):  
Jie Zhang ◽  
Xiangli Xie ◽  
Cunjun Li ◽  
Hai Wang ◽  
Linjiang Wang
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Porous Structure ◽  
Anionic Surfactant ◽  
Self Assembly ◽  
Sodium Dodecyl ◽  
Soft Template ◽  
Shape Evolution ◽  
Hierarchical Porous Structure ◽  
Hierarchical Porous

Flower-like MgAl-SDS-LDH microstructures with a hierarchical porous structure with both large and small mesopores on their surface were synthesized by a self-assembly route, employing the anionic surfactant sodium dodecyl sulfate (SDS) as a soft template.

Water absorption behavior of heat-treated and untreated red balau saw dust/LDPE composites: Its kinetics and effects on mechanical properties

2018 ◽  
Vol 32 (10) ◽  
pp. 1408-1426 ◽  
Author(s):  
Ruth A Lafia-Araga ◽  
Aziz Hassan ◽  
R Yahya ◽  
N Abd Rahman ◽  
Fauzani Md Salleh
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Water Absorption ◽  
Water Immersion ◽  
Treated Wood ◽  
Untreated Wood ◽  
Thermoplastic Composites ◽  
Wood Composites ◽  
Saw Dust ◽  
Heat Treated

The hygroscopic nature of wood limits the use of wood thermoplastic composites (WTC) in outdoor industrial and domestic applications. To reduce this tendency, red balau saw dust was heat treated at 180 and 200°C for 1 h and compounded with Low Density Poly(ethylene) (LDPE) into 20 and 37 wt% and then molded into test specimens by injection molding. Samples were immersed in distilled water at room temperature for 4 months. Heat-treated wood composites showed remarkable water resistance relative to untreated ones. Wood composites made from wood treated at 180 and 200°C exhibited almost similar water absorption pattern. Reduced water absorption of heat-treated wood composites relative to untreated ones indicates that heat treatment has resulted in a degree of modification of the wood. Most of the composites displayed the Fickian mode of water absorption with n values close to 0.5. Also, the diffusion coefficient reduced with wood content in untreated wood composites due to interaction of water with the polar groups in wood through hydrogen bonding. Untreated wood composites exhibited poorer mechanical properties with water immersion as a result of degradation due to moisture. The mechanical properties of the heat-treated wood composites were not adversely affected with water absorption. Therefore, heat treatment can reduce the proneness to water absorption in WTCs and alleviate the detrimental effects on mechanical properties.

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