Results 41 to 50 of about 6,042 (233)

Toward pulping process for enhancing the RS-black liquors as precursor of activated carbons for aqueous adsorbent purposes

Scientific Reports, 2023
This work deals with providing a green pulping process of rice straw with zero waste discharged, via valorization of its by-product as a promising precursor for production of carbon nanostructures.
Vivian F. Lotfy, Zhichao Bao, Xuesong Zhou, Altaf H. Basta, Shiyu Fu   +4 more
doaj   +1 more source

Sulfuric acid bleaching of kraft pulp 1: Bleaching of hardwood and softwood kraft pulps

Journal of Wood Science, 1999
To develop a new nonchlorine bleaching technology, hardwood and softwood kraft pulps, before and after oxygen-alkali predelignification, were treated with dilute sulfuric acid solutions (pH 1.0-1.8) at 100°C for 1 h and then extracted with aqueous sodium hydroxide at 70°C for l h. Hardwood kraft pulp was successfully bleached.
Tsutomu Ikeda, Shuji Hosoya, Yoichi Tomimura, Kengo Magara, Isao Takano   +4 more
openaire   +1 more source

Stabilized Cellulase in Chitosan–Polyvinyl Alcohol Biopolymer Beads for Sustainable Enzymatic Deinking of Recycled Paper

ChemistryOpen, EarlyView.
A stable and reusable biocatalyst, cellulase@Cs/PVA/Ga, is engineered by immobilizing cellulase onto glutaraldehyde‐activated chitosan (Cs) and coating it with polyvinyl alcohol. This composite system enhances enzymatic stability and efficiency for the sustainable deinking of recycled newspaper, offering a green alternative to harsh chemical treatments.
Parisa Chakeri, Ghasem Mohammadi‐Nejad, Ghasem Hosseini Salekdeh, Shohreh Ariaeenejad, Azadeh Lohrasbi‐Nejad   +4 more
wiley   +1 more source

Enhancing the Functional Properties of Polylactic Acid by Incorporation of Esterified Lignin

Journal of Polymer Science, EarlyView.
Esterified lignin from agro‐industrial wastes enhances the hydrophobicity, UV‐shielding efficiency, and antioxidant capacity of polylactic acid composites. ABSTRACT Incorporating lignin as an additive is a promising strategy to overcome the limitations of PLA‐based composites.
Rogerio Martins Vieira, Emilie Gauthier, Syamak Farajikhah, Hernán Dário Zamora Zamora, Fariba Dehghani, Peter Halley, Michel Brienzo   +6 more
wiley   +1 more source

Evaluation and Optimization of Kraft Delignification and Single Stage Hydrogen Peroxide Bleaching for Ethiopian Sugarcane Bagasse

Journal of Natural Fibers, 2022
The current study investigated the Ethiopian sugarcane bagasse during its delignification using the Kraft pulping process and bleaching by single stage hydrogen peroxide process.
Medhanit Mamaye, Zebene Kiflie, Sisay Feleke, Abubeker Yimam   +3 more
doaj   +1 more source

Bio‐Based Polyurethanes: Mechanical Performance, Structure–Property Relationships, and Future Directions

Journal of Polymer Science, EarlyView.
This review examines bio‐based polyurethanes from renewable feedstocks, focusing on structure‐property relationships governing mechanical performance. It analyzes reinforcement strategies, benchmarks against petrochemical counterparts, and explores future directions, including non‐isocyanate routes and circular economy integration for sustainable high ...
Khaled Chawraba, Hussein Medlej, Mohamad Sakr, Akram Hijazi, Abrar Hussain   +4 more
wiley   +1 more source

EFFECTS OF ALKALINE PRE-IMPREGNATION AND PULPING ON MALAYSIA CULTIVATED KENAF (HIBISCUS CANNABINUS

BioResources, 2010
This study was carried out to identify an appropriate alkaline pulping condition for Malaysia cultivated kenaf (Hibiscus cannabinus L.). The chemical composition of the kenaf bast and core fibers, and also whole stalk with different growing time were ...
Lin Suan Ang, Cheu Peng Leh, Chong Chat Lee   +2 more
doaj  

Thermal Characteristics of Lignin Residue from Industrial Processes

BioResources, 2013
Many pulp mills and biorefineries today are focusing on the utilization of their residual lignin for economic return. Although lignin can be burned to produce energy, it also has the potential for the production of value-added products. Technical lignins
Sally Krigstin, Derval dos Santos Rosa, Alcides Leao, Mohini Sain   +3 more
doaj   +1 more source

On the Origins of Out‐of‐Plane Auxetic Response in Paper

physica status solidi (b), EarlyView.
Paper can be auxetic! Paper can exhibit a range of out‐of‐plane Poisson's ratio (PR) values. Examining handsheets made from hardwood (HW) and softwood (SW) fibers, of a variety of weights (1, 3, or 5 g) and refining degrees (none, R, or R+), showed that the sign and magnitude of PR can be finely controlled by modifying network parameters.
Prateek Verma, Anselm C. Griffin, Meisha L. Shofner   +2 more
wiley   +1 more source

Papermaking fibers from giant reed (Arundo donax L.) by advanced ecologically friendly pulping and bleaching technologies

BioResources, 2006
The anatomical structure and chemical composition of the stem-wall material of giant reed is considered from the viewpoint of raw material characterization for industrial fiber production.
Pereira, H., Shatalov, A. A.
doaj