Composition of Two Types of Cellulose Phosphates

Reid, J. David; Mazzeno, Laurence W.; Buras, Edmund M.

doi:10.1021/ie50480a040

Cited by 35 publications

(14 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After impregnation with the phosphorylating reagents, the fabric is dried (and-or pressed) and the chemical reaction is allowed by heating in a curing step. In 1949, Reid et al 54,88 synthesized phosphorylated cellulose derivatives according to a previously described method by Coppick et al 89 : cellulose was soaked in an aqueous solution of phosphoric acid and urea, was then pressed, and successively cured at 100 and 150°C. The Pad-Dry-Cure process was also used with inorganic phosphate salts, for example for the phosphorylation of cellulose with NaH 2 PO 4 -urea.…”

Section: Methodsmentioning

confidence: 99%

Phosphorylation of bio-based compounds: the state of the art

et al. 2015

View full text Add to dashboard Cite

International audienceOver the last few years, more and more papers have been devoted to phosphorus-containing polymers, mainly due to their fire resistance, excellent chelating and metal-adhesion properties. Nevertheless, sustainability, reduction of environmental impacts and green chemistry are increasingly guiding the development of the next generation of materials. The use of bio-based polymer matrices might allow the reduction of environmental impacts by using renewable carbon and by achieving more easily biodegradable or reusable materials. The aim of this review is to present both fundamental and applied research on the phosphorylation of renewable resources, through reactions on naturally occurring functions, and their use in biobased polymer chemistry and applications. In the first section, different strategies for the introduction of phosphorus-containing functions on organic backbones are described. In the following sections, the main families of chemicals based on renewable resources are covered: namely polysaccharides (cellulose, chitosan, starch, dextran etc.), biophenols (lignins, biobased phenolic compounds, cardanol etc.), triglycerides (oils, glycerol) and hydroxy acid compounds

show abstract

Section: Methodsmentioning

confidence: 99%

Phosphorylation of bio-based compounds: the state of the art

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The curves plotting weight loss vs. heating temperature about ammonium cellulose phosphate (1) were very different from the case of cellulose linter (2). The decomposition of (1) began at lower temperature than (2), but the continued decomposition curve of (1) increased more slowly than (2).…”

mentioning

confidence: 80%

“…The decomposition of (1) began at lower temperature than (2), but the continued decomposition curve of (1) increased more slowly than (2). It was almost impossible to prevent charring of cellulose fibre when it was directly exposed to flame, but the presence of phosphate radicals could prevent further burning after the fibre was withdrawn from the flame.…”

mentioning

confidence: 99%

Studies on the Cellulose Phosphate

Katsuura

Nonaka

1957

Sen-i Gakkaishi

View full text Add to dashboard Cite

The brief procedure for preparation of cellulose phosphate by the urea-phosphoric acid had been described by S. Coppick, but no detailed report had been published. The influence of the molar ratio of urea and phosphoric acid, the degree of compression, temperature and duration of prelimi nary drying on the phosphorylation of cellulose were studied. There were optimum molar ratio between them for obtaining highly phosphorylated cellulose. When the molar ratio is constant, the sample prepared under the condition of higher temperature and shorter duration of reaction showed less degradation and higher reactivity. As a whole, the rate of main reaction occured was very small, and by repeating the reaction 3 times the sample containing only 9.03 % phosphorous could be obtained. All samples obtained were insoluble in water and dil. NaOH aq., and were fibrous. As a result of high frequency titration, all phosphate radicals were known to be in the form of two basic ester and the existence of bridge linkage could not he recognized.(PART II) THERMAL STABILITY OF CELLULOSE PHOSPHATE.By Kakuji Katsuura (Faculty of Technology, Shizuoka University, Hamamatsu, Japan)The flameproofing phenomena of cellulose phosphate were analyzed by the thermal balance and the results obtained were as follows :The curves plotting weight loss vs. heating temperature about ammonium cellulose phosphate (1) were very different from the case of cellulose linter (2). The decomposition of (1) began at lower temperature than (2), but the continued decomposition curve of (1) increased more slowly than (2). It was almost impossible to prevent charring of cellulose fibre when it was directly exposed to flame, but the presence of phosphate radicals could prevent further burning after the fibre was withdrawn from the flame. It was recognized that the larger the degree of esterification, the larger the thermal stability.(II) The thermal stability of cellulose phosphates depends upon their polymerization degree. When the degree of esterification is nearly equal, the sample possesed higher molecular weight is superior in thermal stability, and this state is obtainable at higher temperature and shorter duration of reaction.(III) The ammonium salt and natrium salt of cellulose phosphates were very different from each other in weight loss curve, and it could be concluded that the former is better flameproofing than the latter. (Received 23. 4. 1956)

show abstract

“…A similar technique has been used by Klein and Snowden [35] to replace the mesyloxy or tosyloxy groups with halogen, amines [33, 34, 76 ~ , phthalimide, thiophenols, saccharine, substituted phosphoric acids, and nitropropane. In earlier work, Reid and his coworkers ( 47,48] J reported that replacement of hydroxyl groups with chlorine accompanied phosphorylation with phosphorus oxychloride. Iodine has been introduced also by treating fibrous cellulose phosphate with sodium iodide (48J.…”

Section: Modified Cottonsmentioning

confidence: 99%