将 N-羟甲基-3-(二甲氧基膦酰基)丙酰胺、氢氧化钠、碘丁基硅油(IBu-PDMS)为原料,合成了反应型的具有拒水阻燃双重功能的碘丁基-co-N-甲氧基-3-(二甲氧基膦酰基)丙酰胺聚硅氧烷〔(I B-c o-N-MD-PA)PDMS〕,其与棉织物能以共价键结合,利用 FT-IR、1 H NMR表征了其结构。利用 TGA、氧指数仪分析了拒水阻燃多功能棉织物的热性能及其阻燃性与阻燃机理,通过测定其接触角表征其拒水性。结果表明,制备的(IB-co-N-MDPA)PDMS 与棉纤维反应,使棉织物有拒水性能,它实际上控制了棉纤维的热裂解,使纤维发生脱水炭化,促进了炭化层的形成,最后的残炭量由10.5%提高至42.4%,棉织物的极限氧指数从18提高到28,拒水等级为90,接触角从88.37°提高到119.73°。
Reactive iodine butyl-co-N-methoxy-3-(dimethoxy dibenzyloxyphosphoiyl)propionamide polysiloxane [(IB-co-N-MDPA)PDMS)]with double functions of water repellency and flame retardancy was synthesized using N-methylol-3-(dimethoxy dibenzyloxyphosphoiyl)acrylic amide,sodium hydroxide and poly (4-iodo-n-butoxy)methylsiloxane as raw materials.The structure of (IB-co-N-MDPA)PDMS was characterized by the FT-IR and 1 H NMR.It could be combined with cotton by covalent bonds.The morphology,thermal proper-ties,flame retardency and flame retardent mechanism of the multifunctional cotton fabric were analyzed using TGA and limit oxygen index (LOI)instruments.The contact angle and water repellency of it were tested.The results showed that(IB-co-N-MDPA)PDMS reacted with cotton fiber to form crosslinked membrane on the sur-face,which had water repellency function.And also the coexistence of silicon,nitrogen and phosphorus could produce synergistic flame-retardant effect.On one hand,the melting siloxane polymer formed a covering layer on the surface of fiber when the retardants were heated.The covering layer became a protective screen between the condensed phase and flame.On the other hand,the addition of (IB-co-N-MDPA)PDMS controlled the py-rolysis of cotton fiber to make the fiber dehydrated and carbonized,which promoted the formation of carboniza-tion layer.The final amount of residual carbon increased from 10.5% to 42.4%.The LOI of cotton fabric in-creased from 18 to 28 and the contact angle increased from 88.37°to 119.73°.The water repellent level was 90.
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