HRP酶促HEMA接枝蚕丝织物的制备及结构性能测试

Preparation, Structure and Property Testing of Hydroxyethyl Methacrylate Grafted Silk Fabric Catalyzed by Horseradish Peroxidase

利用生物酶催化织物的接枝改性具有环保的特点。采用辣根过氧化物酶(HRP)/H2O2/乙酰丙酮(Acac)催化引发体系,将甲基丙烯酸羟乙酯(HEMA)与蚕丝织物接枝共聚,改善蚕丝织物的抗皱性能。以接枝率为考核指标,通过单因素试验获得较佳的接枝工艺条件为:单体质量分数120%(o.w.f),反应温度50℃,HRP浓度0.8×10-5mol/L,0.3%H2O2用量0.1m L,反应时间12 h,反应体系p H 7。采用傅里叶红外光谱(FTIR)表征HEMA已接枝到蚕丝织物表面,扫描电子显微镜(SEM)观察接枝后蚕丝织物的表面变粗糙。测试接枝蚕丝织物的抗皱性能有较大提高,其中湿态折皱回复角提高了1.5倍,但织物的白度和断裂强力有所下降。HRP/H2O2/Acac酶促体系可成功将HEMA接枝到蚕丝织物表面,改善其抗皱性能。

Grafting modification of fabrics through bioenzyme catalysis is environmental friendly, Silk fabric was grafted with hydroxyethyl methacrylate （HEMA） to improve its crease resistance using the catalytic system of horseradish peroxidase （HRP）/H2O2/acetylacetone （Acac）. Taking grafting rate as the evaluation index, single factor tests revealed that the optimum grafting reaction condition was as follows, monomer mass fraction 120% （o.w.f）, reaction temperature 50 ℃, HRP concentration 0. 8×10^-5 mol/L, 0. 3% H202 dosage 0. 1 mL, reaction time 12 h, and pH of reaction liquid 7. Fourier trans- form infrared spectroscopy （FTIR） characterization proved that HEMA was grafted onto the surface of silk fabric, and scanning electron microscope （SEM） observation showed that the surface of grafted silk fabric became rough. The crease resistance of grafted silk fabric was improved, and the wet wrinkle recovery angle increased by 1.5 times, whereas the whiteness and breaking strength of grafted silk fabric decreased to some extent. The results showed that HEMA can be successfully grafted onto silk fabric using HRP/H2O2/Acac catalytic system and the crease resistance of grafted silk fabric can be improved.