Fabrication of superhydrophilic PVDF membranes by one-step modification with eco-friendly phytic acid and polyethyleneimine complex for oil-in-water emulsions separation

Flame retardancy efficacy of phytic acid: An overview

“…PA carries about 80%–85% of total phosphorus in plants, hence considered as major storage of phosphorus. It has ~28 wt% phosphorus and thus has great potential as suitable alternative phosphorus source 13–15 . PA has been employed as a suitable P‐FR due to its decomposition at temperatures around 200°C, thereby promoting the dehydration of the carbon source to form a stable protective layer that acts as a barrier between the flame and the combustible material 16 .…”

“…It has ~28 wt% phosphorus and thus has great potential as suitable alternative phosphorus source. [13][14][15] PA has been employed as a suitable P-FR due to its decomposition at temperatures around 200 C, thereby promoting the dehydration of the carbon source to form a stable protective layer that acts as a barrier between the flame and the combustible material. 16 PA, also known as myoinositolhexaphosphoric, myo-inositol (1,2,3,4,5,6)hexakishosphoric acid, or inositol hexaphophoric acid, is formed during the ripening of seeds and grains and contains a 6-C ring with 1 H and 1 phosphate.…”

Evaluating the Flame Retardancy of Shaving Super Bamboo Layer by Layer Self-Assembly With Phytic Acid-Polyethyleneimine

“…The phosphorus element makes it a potential green biomass flame retardant. Negative charges were found in the PA solution due to the existence of the special structure that 12 acidic groups were symmetrically connected to a cyclohexanol ring (Jo et al, 2008;Ye et al, 2012;Zeng et al, 2021). The thermal stability and mechanical property of the matrix were declined once combined with PA.…”

“…Therefore, PA is more often combined with some nitrogencontaining compounds such as chitosan, melamine, and polyethyleneimine because the combination results in a synergistic fire-retarding effect once they are used as a flame retardant (Zhang et al, 2014a;Zhang et al, 2014b;Jin et al, 2017;Wang et al, 2019;Zmz et al, 2019). It has been proved that the combination of PA with nitrogen-containing compound will be made into an intumescent flame retardant (IFR) system with PA as an acid source and phosphorus source (Dusková et al, 2001;Zhang et al, 2014a;Jin et al, 2017;Zeng et al, 2021). In addition, a gas source in the IFR system is provided by nitrogen-containing compounds with releasing incombustible gases of N 2 and NO 2 in the combustion process of composites (Nguyen et al, 2013;Zhang et al, 2014b;Xiong et al, 2019).…”

Effect of Polymer Dissolution Temperature and Conditioning Time on the Morphological and Physicochemical Characteristics of Poly(Vinylidene Fluoride) Membranes Prepared by Non-Solvent Induced Phase Separation

“…PVDF is a polymer of growing interest for membrane fabrication, based on its low surface energy, relatively high hydrophobicity, high mechanical strength, chemical resistance and thermal stability compared to other commercial polymer materials [ 2 , 24 , 25 ]. It also shows a very good processability as film [ 26 , 27 ], membranes [ 28 , 29 , 30 ], electrospun membranes [ 31 , 32 ], hollow fibres [ 33 , 34 ] or tubular membranes [ 35 ]. The non-solvent induced phase separation (NIPS) process is widely used to produce the membranes; in this process a polymeric solution contacts with a non-solvent inducing a phase separation into two different phases, one with high concentration of polymer and another with low concentration, enabling the formation of polymeric porous structures [ 2 , 36 , 37 , 38 ].…”