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Developing Formaldehyde Free Flame Retardant for Cellulose
University of Borås, Swedish School of Textiles.
2011 (English)Independent thesis Advanced level (degree of Master (One Year))Student thesis
Abstract [en]

Two organophosphorus compounds, namely diethyloxymethyl-9-oxa-10- phosphaphenanthrene-10-oxide (DOPAC) and diethyl (2,2-diethoxyethyl) phosphonate (DPAC) were applied on cotton cellulose to impart non-carcinogenic and durable (in alkaline washing) flame retardant property to it. Some acidic catalysts, sodium dihydrogen phosphate (NaH2PO4), ammonium dihydrogen phosphate (NH4H2PO4) and phosphoric acid (H3PO4), were successfully used to settle acetal linkage between cellulose and flame retardant (FR) compound. Appreciable limiting oxygen index (LOI) values of 24% and 23.9% were achieved in case of the samples treated with FR compound DPAC along with the combined acidic catalyzing effect of NaH2PO4+H3PO4 and NaH2PO4+NH4H2PO4. A distinguishing outcome of total heat of combustion (THC) 3.27 KJ/g was revealed during pyrolysis combustion flow calorimetry (PCFC) test of the treated sample. In respect of thermal degradation, low temperature dehydration in conjugation with sufficient amount of char residue (30.5%) was obtained in case of DOPAC treated sample. Consistently, the temperature of peak heat release rate (TPHRR) (325°C) of DPAC treated sample supported the expected low temperature pyrolysis in condensed phase mechanism. Subsequent thermogravimetric analysis (TGA) also reported inspiring weight retention% of the treated samples. Furthermore, for both of the flame retardant compounds, effect of different catalysts, considering both individual and combined, effect of solvents, and overall the optimization of the process parameters were studied in detail.

Place, publisher, year, edition, pages
University of Borås/Swedish School of Textiles , 2011.
Series
Magisteruppsats ; 2011.7.4
Keywords [en]
cotton cellulose, organophosphorus flame retardant, acetal linkage, low temperature pyrolysis, THC, HRR, char residue, LOI
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hb:diva-20854Local ID: 2320/9246OAI: oai:DiVA.org:hb-20854DiVA, id: diva2:1312788
Note
Program: Magisterutbildning i textilteknologiAvailable from: 2019-04-30 Created: 2019-04-30

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Citation style
  • apa
  • harvard1
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Output format
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