本文選題：木質(zhì)素磺酸鹽　切入點：分子量分級　出處：《高�；瘜W(xué)工程學(xué)報》2016年05期

【摘要】：為提升低品質(zhì)木質(zhì)素磺酸鹽的分散研磨性能,以高品質(zhì)的Reax 85A為基礎(chǔ)性研究的對象,通過不同截留分子量的超濾膜對它進行分子量分級,獲得了三個不同特性黏度([η])的木質(zhì)素磺酸鹽組分。將它們作為分散劑對C.I.分散藍354的原染料進行研磨以考察其分散研磨效率。結(jié)果表明,木質(zhì)素磺酸鹽的分散研磨性能與其特性黏度大小正相關(guān)。為驗證這一結(jié)論,在苯酚和甲醛的存在下,對特性黏度較小的木質(zhì)素磺酸鹽進行了分子量嫁接的改性反應(yīng),并考察了各改性產(chǎn)物作為分散劑在相同實驗條件下對同一染料的分散研磨效率。結(jié)果表明,改性產(chǎn)物的特性黏度隨苯酚和甲醛投料質(zhì)量比的增加而增大,但是苯酚和甲醛的投料質(zhì)量比不宜過大,否則會有酚醛縮合物生成;特性黏度較大的改性產(chǎn)物其分散研磨性能也較好,組分R-00([η]=2.25)與Vyborg([η]=3.74)經(jīng)嫁接反應(yīng)后獲得的改性產(chǎn)物([η]=4.28)使同一染料分散體的擴散度達到5級只需要16 h,其分散研磨效率高于Reax 85A。
[Abstract]:In order to improve the dispersive grinding performance of low quality lignosulfonate, high quality Reax 85A was used as the basic research object, and the molecular weight was classified by ultrafiltration membrane with different molecular weight interception.Three lignosulfonate components with different intrinsic viscosity ([畏]) were obtained.They were used as dispersants for C. I.The raw dye of disperse blue 354 was ground to investigate its dispersion grinding efficiency.The results show that the dispersive grinding performance of lignosulfonate is positively related to its intrinsic viscosity.In order to verify this conclusion, in the presence of phenol and formaldehyde, lignosulfonate with low intrinsic viscosity was grafted with molecular weight.The dispersing efficiency of the modified products for the same dye was investigated under the same experimental conditions.The results show that the intrinsic viscosity of the modified product increases with the increase of the mass ratio of phenol to formaldehyde, but the mass ratio of phenol to formaldehyde should not be too large, otherwise there will be phenolic condensation.
【作者單位】： 華東理工大學(xué)精細化工研究所;南通恒盛精細化工有限公司;
【分類號】：X793;TQ610.499

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本文編號：1719591