chapter9detergencyofsurfactants-閱讀頁(yè)
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【正文】 3O10 STPP) (a) Chelation power of Ca++ Water –102 CaCO3 mg/g STPP – 468 CaCO3 mg/g Polyacrylate (PAA) – 466 CaCO3 mg/g (b) Alkaline buffering power – pH adjusting Water – neutralizing ml NaOH aq. STPP – neutralizing ml NaOH aq. PAA – neutralizing ml NaOH aq. (c) Dispersing power – dispersion of particles Water – dispersing ppm Mn STPP – dispersing ppm Mn PAA – dispersing ppm Mn Disadvantage : – pollute environment (2) Zeolite molecular sieve (4A型沸石分子篩 ) – NaOAl2O3 nSiO2H2O A type : Al2O3: SiO2(mole) = (a) Mechanism ? Ion exchange – power of Ca++exchange 300mg CaCO3/g ? Coprecipitation with soil (與污垢共沉淀 ) ? Safety (安全 ) (b) Disadvantage ? Low rate of exchange ? No dispersibility (3) Other builders ? Polyacrylate ? Polymaleate (聚馬來(lái)酸 ) 4. Other auxiliary agents (1) Bleacher (漂白劑 ) – peroxide , sodium perborate (過(guò)硼酸鈉 ), sodium percarbonate(過(guò)碳酸鈉 ), etc (2) Fluorescent bleachng agent (熒光劑 ) – adsorption 300400nm ultraviolet radiation radiation 400500nm visible light (3) Enzyme – protease (蛋白酶 ), amylase(淀粉酶 ), lipase (脂肪酶 ), cellulase (纖維素酶 ) (4) Finishing agents antistatic agents (抗靜電劑 ), antibacterial agents (抗菌劑 ), softening agents (柔軟劑 ) 5. Standard washing powder Surfactants 15% Builder (STPP) 17% Sodium silicate(硅酸鈉 ) 10% Sodium carbonate(碳酸鈉 ) 3% Sodium sulfate(硫酸鈉 ) 18% CMC 1%
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