Results 41 to 50 of about 5,771 (195)

Dual‐Functional Sulfonated Nanocellulose for Proton Exchange Membranes With High Proton Conductivity at Low Humidity

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A scalable dual‐functional strategy yields simultaneously sulfonated and nanosized cellulose for proton exchange membranes with continuous hydrogen‐bond networks. These sustainable membranes exhibit low‐humidity proton conductivity twofold higher than Nafion 212, providing a robust solution for next‐generation fuel cells.
Nan Li, Sufeng Zhang, Yali Liu, Jinrui Li, Ning Wei, Chaoyang Li, Tanyanyu Wang   +6 more
wiley   +1 more source

Sustainable Process for the Depolymerization/Oxidation of Softwood and Hardwood Kraft Lignins Using Hydrogen Peroxide under Ambient Conditions

Molecules, 2020
The present study demonstrated a sustainable and cost-effective approach to depolymerize/oxidize softwood (SW) and hardwood (HW) kraft lignins using concentrated hydrogen peroxide at temperatures ranging from 25 to 35 °C, in the absence of catalysts or ...
Zaid Ahmad, Waleed Wafa Al Dajani, Michael Paleologou, Chunbao (Charles) Xu   +3 more
doaj   +1 more source

Biomass‐derived hydrochars as eco‐friendly adsorbents for wastewater treatment applications

Environmental Progress &Sustainable Energy, EarlyView.
Abstract Emerging organic pollutants (EOPs), such as diethyl phthalate (DEP), bisphenol A (BPA), and methylene blue (MB), are only partially removed in conventional wastewater treatment plants. This study assesses hydrochars produced by hydrothermal carbonization (HTC) of spruce bark (SB), vine shoots (VSs), and wheat straw (WSs) for removing three ...
Emanuel Gheorghita Armanu, Sara Ribeirinho‐Soares, Christian Eberlein, Hermann J. Heipieper, Irina Volf, Olga C. Nunes, Olívia Salomé G. P. Soares   +6 more
wiley   +1 more source

Effect of Physical Properties of Softwoods on Embedment Strength Performance of Self-tapping Screws

BioResources, 2023
The embedment strength performance of the self-tapping screw (STS) connector, used as a cross-laminated timber fastener, was evaluated considering tree species’ density and load direction as parameters.
In-Hwan Lee, Keon-Ho Kim
doaj   +2 more sources

Evaluation of degradation in chemical compounds of wood in historical buildings using ft-ir and ft-raman vibrational spectroscopy

Maderas: Ciencia y Tecnología, 2019
Vibrational spectroscopy approaches like FT-IR and FT-Raman, as analytical method, can be used to assess chemical changes in historical wood structures.
Seyed Mahdi Moosavi Nejad, Mehrab Madhoushi, Mohammad Vakili, Davood Rasouli   +3 more
doaj  

Char Layer Thickness Evolution During Structural Timber Fire Experiment and Final Density Profile

Fire and Materials, EarlyView.
ABSTRACT This paper evaluates several non‐destructive experimental methods for determining the char layer thickness and its density profile in structural timber samples exposed to standard ISO 834 fire curve experiments. Microwave echo pulse, ultrasonic echo pulse, X‐ray computed tomography, and resistance drilling were evaluated.
Fernando Pérez Pérez, Kiarash Tajbakhsh, Joachim Schmid, Robert Zboray, Andrea Frangi   +4 more
wiley   +1 more source

The Relationship between Different Proofs of Load-Bearing Capacity, Fire Resistance of the Cross-Section and the Price of Solid Softwood

Buildings
The impact of ultimate limit state checks on the fire resistance of the cross-section (element) of softwood structural timber is analyzed in this study, which was found to depend on the cross-sectional area, strength class or material quality expressed ...
Jurko Zovkić, Zlata Dolaček-Alduk
doaj   +1 more source

When governments act as strategists: Geopolitical turmoil and global strategy theory

Global Strategy Journal, EarlyView.
Abstract Research Summary The resurgence of geopolitical rivalry is challenging core assumptions of global strategy theory. Long‐standing views that economic interdependence is inherently beneficial, governments act as rule setters, multinational enterprises operate autonomously, and market and political strategy are separate no longer capture today's ...
Ari Van Assche, Thomas Lindner
wiley   +1 more source

Low‐Hysteresis Cellulose‐Based Hydrogels for Strain Detecting

Macromolecular Rapid Communications, EarlyView.
Low‐hysteresis hydrogel with high cellulose content is prepared. The modified cellulose is prepared through a sequential periodate oxidation and borohydride reduction process. The hydrogel can be used as a strain sensor with a gauge factor of 1.1 in the 0%–300% sensing range.
Xia Sun, Fanghan Luo, Feng Jiang
wiley   +1 more source

Covalently Immobilized Lignin–Xanthene Conjugates for Persistent Surface Photochemistry and Self‐Sterilizing Interfaces Under Ambient Visible Light

Macromolecular Rapid Communications, EarlyView.
Bio‐derived lignin–Eosin Y macromolecular networks are developed as visible‐light‐responsive self‐sterilizing coatings that generate reactive oxygen species without leaching. The spray‐coated photopolymerized surfaces exhibit durable antibacterial and antiviral activity under ambient light for extended periods, demonstrating a scalable and sustainable ...
Euna Oh, Surjith Kumaran, Sumin Han, Kiseok Lee, Hyerin Shin, Seokmin Oh, Dae‐Hong Ko, Hyo‐Jick Choi   +7 more
wiley   +1 more source