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为了发展一个新的生物活性物质利用纤维素资源,采用高碘酸钠(NalO4)对微晶纤维素(MCC)进行选择性氧化,又与亚硫酸氢钠(NaHSO3)进行磺化反应,得到了双醛纤维素硫酸酯(OSC)。通过红外光谱(FTIR)分析手段对产品结构进行了表征。并考察了工艺参数对DAC醛基含量和OSC取代度的影响,得出了各合成阶段的关键工艺参数——时间、温度、pH值和反应物配比的最佳控制值。结果表明:当反应物配比为n(NaHSO3)∶n(DAC)=2∶1,产品合成温度为22℃,合成时间为2 h时,所得产品磺酸基取代度最高,并具有明显的表面活性。
In order to develop a new bioactive material using cellulose resources, selective oxidation of microcrystalline cellulose (MCC) with sodium periodate (NalO4) and sulfonation reaction with sodium bisulfite (NaHSO3) Dialdehyde Cellulose Sulfate (OSC). The structure of the product was characterized by infrared spectroscopy (FTIR) analysis. The effects of process parameters on the content of aldehyde groups and the degree of substitution of OSC were investigated. The key control parameters such as time, temperature, pH and reactant ratio were obtained. The results showed that when the molar ratio of n (NaHSO3): n (DAC) was 2:1, the synthesis temperature of the product was 22 ℃ and the synthesis time was 2 h, the degree of substitution of the sulfonate group was the highest Surface activity.