Results 181 to 190 of about 136,626 (254)

Migration of melamine and formaldehyde from tableware made of melamine resin

Food Additives and Contaminants, 1986
Migration of melamine and formaldehyde into food-simulating solvents from cups made of melamine resin was studied under various conditions. Little migration of melamine was observed in any unused cups kept at 60 degrees C for 30 min, room temperature (26 degrees C) for 1 h or cooled at -20 degrees C for several days.
H, Ishiwata, T, Inoue, A, Tanimura
openaire   +2 more sources

Development of a High-Efficient and Environmentally Friendly Melamine-Formaldehyde Resin-Based Solid Phase Microextraction Fiber for Enhanced Extraction of Polycyclic Aromatic Hydrocarbons from Environmental Water

Green Chemistry
An innovative solid-phase microextraction (SPME) fiber coating, melamine-formaldehyde resin (MFR), was synthesized with a green cross-linker, paraformaldehyde, and exhibited high heat resistance (up to 350 °C).
Pengfei Li, Yehong Han, Dandan Han, Hongyuan Yan   +3 more
semanticscholar   +1 more source

Facile synthesis of microencapsulated 1-dodecanol/melamine-formaldehyde phase change material using in-situ polymerization for thermal energy storage

, 2020
In this study, a new microencapsulated organic PCM (MicroPCM) was developed and its thermal energy storage (TES) properties were experimentally investigated.
G. Kumar, Bader Al-Aifan, R. Parameshwaran, V. V. Ram   +3 more
semanticscholar   +1 more source

Efficient removal of Congo red dye from aqueous solution by adsorbent films of polyvinyl alcohol/melamine-formaldehyde composite and bactericidal effects

, 2020
Removal of harmful dyes and inhabitation of bacterial growth is one of the outstanding priorities in both environmental and industrial applications. The recognition of the alarming industrial discharge and insufficiency of fresh water has prompted us to ...
Shahnawaz Ahmad Bhat, F. Zafar, A. H. Mondal, Azar Ullah Mirza, Q. Haq., N. Nishat   +5 more
semanticscholar   +1 more source

Urea–Formaldehyde and Melamine–Formaldehyde Polymers

1989
According to Meyer1 the history of urea–formaldehyde (UF) resins can be divided into five different periods: (i) Synthesis of the raw materials urea and formaldehyde. This period started with the synthesis of urea by Wohler in 1824. Formaldehyde was first recognized by Butlerov in 1859 when attempting to synthesize methanediol.
Dietrich Braun, Hans-Josef Ritzert
openaire   +1 more source

Study of melamine and formaldehyde migration from melamine tableware

European Food Research and Technology, 2016
Two HPLC–UV rapid methods have been developed to quantify and identify melamine, ammeline, ammelide and formaldehyde in samples of melamine plastic kitchenware. Eighteen samples of melamine articles purchased at various markets in Galicia (Spain) and Quito (Ecuador) were analyzed. Melamine analysis was carried out using a HILIC column (150 × 3 mm, 3 µm
V. García Ibarra, A. Rodríguez Bernaldo de Quirós, R. Sendón   +2 more
openaire   +1 more source

Synthesis and characterization of microencapsulated paraffin with melamine-urea-formaldehyde shell modified with lignin.

International Journal of Biological Macromolecules
The study aims to fabricate MUF/paraffin microcapsules with lignin nanoparticles (LNPs)/ melamine-urea-formaldehyde (MUF) resin as hybrid shell material with different LNPs addition were synthesized in oil-in-water emulsion stabilized synergistically by ...
Shenjie Han, Jingpeng Li, Yulian Lu, Jian Zang, Qingyun Ding, Jinyu Su, Xing Wang, Jiangang Song, Yun Lu   +8 more
semanticscholar   +1 more source

Enhanced mechanical properties and thermal conductivity of paraffin microcapsules shelled by hydrophobic-silicon carbide modified melamine-formaldehyde resin

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2020
A new microencapsulated phase change material was prepared by in-situ polymerization using paraffin as core and hydrophobic-silicon carbide (H-SiC) modified melamine-formaldehyde (MF) resin as shell material. The effects of H-SiC dosage on the mechanical
Baoliang Zhang, S. Li, X. Fei, Hongbin Zhao, X. Lou   +4 more
semanticscholar   +1 more source

Pyrolysis of melamine–formaldehyde and urea–formaldehyde resins

Journal of Applied Polymer Science, 1991
AbstractPyrolysis of melamine–formaldehyde and urea–formaldehyde resins in helium and air was investigated by means of TG and gravimetry with isothermal heating, as well as elemental and HCN analyses. Weight loss curves suggest three kinds of reactions involved in the pyrolysis, namely, initiation reactions, reactions splitting off volatile fragments ...
Toshimi Hirata, Sumire Kawamoto, Akio Okuro   +2 more
openaire   +1 more source

Amplified fluorescence detection and adsorption of Au3+ by the fluorescent melamine formaldehyde microspheres incorporated with N and S co-doped carbon dots.

Journal of Hazardous Materials, 2020
Gold is one of the potential toxic heavy metals. In the present study, Au3+ was detected and removed by newly-designed fluorescent microspheres (MF-CDs), i.e. melamine formaldehyde microspheres incorporated with N and S co-doped carbon dots (N,S-CDs).
Sikai Qin, Xu Yu, Li Xu
semanticscholar   +1 more source