Results 81 to 90 of about 7,954 (270)

Safety assessment of the substance α‐tocopherol acetate for use in food contact materials

EFSA Journal, 2016
This scientific opinion of the EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF) deals with the safety assessment of α‐tocopherol acetate, CAS Nos 7695‐91‐2 and 58‐95‐7, and FCM No 1055, as an antioxidant for its use in
EFSA Panel on Food Contact Materials, Enzymes, Flavourings and Processing Aids (CEF)
doaj   +1 more source

One century of teaching, research, and innovation in chemical engineering in Mexico: The role of chemical engineering in the background and future of polymer science and industrial production in Mexico

The Canadian Journal of Chemical Engineering, EarlyView.
Timeline of key academic milestones and individuals that shaped chemical engineering at FQ‐UNAM and in Mexico. Abstract One hundred years after the beginning of the teaching of Chemical Engineering in Mexico, which started in 1925 in the former National School of Chemical Sciences, currently Faculty of Chemistry (FQ) at National Autonomous University ...
Patricia Pérez‐Salinas, Alberto Rosas‐Aburto, Eduardo Vivaldo‐Lima   +2 more
wiley   +1 more source

Study on the onset mechanism of bio-blister degradation of polyolefin by diatom attachment in seawater

Scientific Reports
It is essential to develop a mechanism for lowering the molecular weight of polyolefins to achieve biodegradation in seawater. In this study, a polypropylene/polylactic acid blend sample was first subjected to photodegradation pretreatment, and it was ...
Hisayuki Nakatani, Shun Narizumi, Seiya Okubo, Suguru Motokucho, Anh Thi Ngoc Dao, Hee-Jin Kim, Mitsuharu Yagi, Yusaku Kyozuka, Shigenobu Miura, Kanth V. Josyula   +9 more
doaj   +1 more source

Circular and Bio‐Sourced Polymers for Energy Applications: Natural Feedstocks, Recycling, and Upcycling Routes

EcoEnergy, EarlyView.
This review provides a critical comparative analysis of circular and bio‐sourced polymers for energy storage, systematically evaluating natural feedstocks alongside recycling and upcycling strategies for battery components. Key structure–property–performance relationships and inherent trade‐offs between sustainability metrics and electrochemical ...
Priyank Sinha, Amul Jain, Koushik Mahata, Sanjib Banerjee   +3 more
wiley   +1 more source

Synthesis of Degradable Polyolefins Bearing Disulfide Units via Metathesis Copolymerization

, 2023
Disulfide bonds are dynamic covalent bonds, which are easy to cleave and reform upon chemical stimulus. Various methods including the oxidative coupling of thiols and polymerization of disulfide-containing monomers have been developed for the synthesis ...
Wenyan Hao, Shan Tang, Yu Xia, Fulin Zhou   +3 more
core   +1 more source

Dynamic Covalent Chemistry Enables Self‐Healing and Compatibilization in Polypropylene Composites

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A high‐performance polypropylene insulation material is created through dynamic covalent crosslinking. It achieves exceptional dielectric properties, autonomous self‐healing, and easy recycling, offering a sustainable solution for future HVDC transmission systems.
Hongzhe Zhang, Wenye Zhang, Wenjie Huang, Jun‐Wei Zha   +3 more
wiley   +1 more source

Virgin-like High-Density Polyethylene from Recycled Mixed Polyolefins

, 2023
Reported herein is the compatibilization of mixed polyolefins containing a rheology modifier (M-PORM) derived from municipal solid waste (MSW) by using different types of compatibilizers.
Tanyaradzwa S. Muzata (17310093), Laurent M. Matuana (14075920), Muhammad Rabnawaz (1707136)   +2 more
core   +1 more source

Adhesion and sliding tribological properties of polyolefins treated by diffuse coplanar surface barrier discharges

eXPRESS Polymer Letters, 2018
A study is presented on the plasma treatment of two different ultra-high molecular weight polyethylene (UHMWPE) and polypropylene (PP) surfaces by using diffuse coplanar surface barrier discharges under atmospheric air conditions.
A. Saranko, Z. Szakal, G. Kalacska, P. Samyn, J. Sukumaran, S. Klebert, Z. Karoly   +6 more
doaj   +1 more source

Interfacial Solvent Molecular Engineering via High‐Safety Dense Separators for High‐Rate Lithium‐Ion Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The dense PPS‐separator prevents thermal runaway by allowing electron transfer through the steel needle during penetration, while the residual electrolyte enables brief ion migration and Joule heating, causing rapid electrolyte vaporization, collapse of the ion transport network, and a sharp drop in ionic conductivity.
Haitao Zhou, Jie Gu, Haiyun Zhou, Yihong Deng, Yafei Shi, Yang Yang, Chen Wang, Hongquan Gao, Jianchun Wu, Libo Wang, Xiangdong Huo   +10 more
wiley   +1 more source

Dominant Lithium‐Ion Conduction and Desolvation Regulation Enabled by Lithiated Monodisperse Nanospheres Composite Separator for High‐Nickel Lithium Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
To match high‐nickel lithium batteries, a composite separator is designed using a sulfonation‐lithiation nanosphere coating modification strategy. The composite separator can enhance the selectivity of lithium‐ion transport, accelerate Li+‐desolvation, and capture Ni, Co, and Mn ions.
Jin Gong, Guigang Wang, Xiaoyan Feng, Tingfeng Xiao, Lishun Dai, Qingfu Zhang, Shuyu Gao, Jingchao Chai, Yun Zheng, Li Yang, Ming Xie, Wei Zhang, Zhihong Liu   +12 more
wiley   +1 more source