A superhydrophobic and porous polymer adsorbent with large surface area

2021 ◽  
Vol 9 (1) ◽  
pp. 254-258
Author(s):  
Li Gong ◽  
Wenhao Wu ◽  
Daohui Lin ◽  
Kun Yang
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Porous Polymer ◽  
Large Surface Area ◽  
Cross Linking ◽  
Microporous Polymer ◽  
Polymer Adsorbent

A superhydrophobic hypercrosslinked microporous polymer adsorbent, SHMP-1 was synthesized from 1,3,5-trinaphthylbenzene by cross-linking of methylene. SHMP-1 has the largest specific surface area of 2100 m2 g−1 among superhydrophobic materials.

scholarly journals Activated Carbons from Thermoplastic Precursors and Their Energy Storage Applications

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 896 ◽  
Author(s):  
Hye-Min Lee ◽  
Kwan-Woo Kim ◽  
Young-Kwon Park ◽  
Kay-Hyeok An ◽  
Soo-Jin Park ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Specific Surface ◽  
Surface Area ◽  
Field Emission ◽  
Specific Surface Area ◽  
Pore Volume ◽  
Activated Carbons ◽  
Total Pore Volume ◽  
Cross Linking ◽  
Mesopore Volume

In this study, low-density polyethylene (LDPE)-derived activated carbons (PE-AC) were prepared as electrode materials for an electric double-layer capacitor (EDLC) by techniques of cross-linking, carbonization, and subsequent activation under various conditions. The surface morphologies and structural characteristics of the PE-AC were observed by field-emission scanning electron microscope, Cs-corrected field-emission transmission electron microscope, and X-ray diffraction analysis, respectively. The nitrogen adsorption isotherm-desorption characteristics were confirmed by Brunauer–Emmett–Teller, nonlocal density functional theory, and Barrett–Joyner–Halenda equations at 77 K. The results showed that the specific surface area and total pore volume of the activated samples increased with increasing the activation time. The specific surface area, the total pore volume, and mesopore volume of the PE-AC were found to be increased finally to 1600 m2/g, 0.86 cm3/g, and 0.3 cm3/g, respectively. The PE-AC also exhibited a high mesopore volume ratio of 35%. This mesopore-rich characteristic of the activated carbon from the LDPE is considered to be originated from the cross-linking density and crystallinity of precursor polymer. The high specific surface area and mesopore volume of the PE-AC led to their excellent performance as EDLC electrodes, including a specific capacitance of 112 F/g.

Dual-porous cellulose nanofibril aerogels via modular drying and cross-linking

Nanoscale ◽  
2020 ◽  
Vol 12 (13) ◽  
pp. 7383-7394 ◽  
Author(s):  
Tingting Wu ◽  
Zhihui Zeng ◽  
Gilberto Siqueira ◽  
Kevin De France ◽  
Deeptanshu Sivaraman ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Supercritical Drying ◽  
Cross Linking ◽  
Cellulose Nanofibril ◽  
Bet Specific Surface Area

Cellulose nanofibril (CNF) dual-porous aerogel with BET specific surface area up to 430 m2 g−1 was prepared via a modular process combining directional freeze-thawing (macro-pores, ca. 50–200 μm) and supercritical drying (meso-pores, ca. 2–50 nm).

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