摘要
采用PAN(聚丙烯腈)、季胺化的PAN-CO-DMAEMA、DMF等混合溶液制备荷电耐污染超滤膜。在改进消化条件的基础上,对酸凝—酸化法提取海藻酸钠的工艺做了进一步优化。得到的较佳工艺条件为:先用1%甲醛溶液浸泡海带4h,用4%Na2CO3溶液常温消化3h后,用盐酸溶液沉淀出海藻酸,用1%Na2CO3中和海藻酸胶块,再用90mL浓度为10%的次氯酸钠溶液脱色1h,采用膜分离技术超滤后加入无水乙醇析出絮凝状海藻酸钠,最后烘干至恒重,粉碎得海藻酸钠成品。分析结果表明,海藻酸钠性征和得率均有明显改善。
Based on the improved digestion conditions, the ultra filtration technology was used to optimize the traditional acid condensate - acidification in extraction of the sodium alginate from the kelp. Membrane prepared from the mixed solution of PAN, PAN-CO-DMAEMA, DMF could be resistant to higher pollution than the conventional PAN membrane. The optimum conditions combined with the UF technology could be described as： firstly, soak kelp four hours with 1% formaldehyde solution; secondly, digest the sample with 4% Na2CO3 solution at room temperature for 3 hours; thirdly, precipitate to get the alginate with hydrochloric acid; fourthly, antacid the alginate blocks by using 1% Na2CO3; fifthly, decolorize with 10% sodium hypochlorite for one hour; sixthly, ultra filtration membrane separation technology was included before adding ethanol to get the flocculation-alginate; lastly, the final alginate products was got by drying and smashing. The results showed that the alginate product＇s performance coincided with the commercial food-grade, and the extraction rate was improved greatly than the conventional technology.
出处
《海洋通报》
CAS
CSCD
北大核心
2010年第1期96-100,共5页
Marine Science Bulletin
基金
浙江省农业财政项目"以海定陆
海陆联动"海洋污染监控机制研究
卫星海洋环境动力学国家重点实验室开放课题(SOED0608)
化材学院教改项目"海洋技术专业培养体系的改革与实践"课题资助
关键词
荷电超滤
耐污染
海藻酸钠
Charged ultrafiltration
Pollution-resistant
Sodium alginate
作者简介
曾淦宁（1977-），男，江西省新干县人，博士，研究方向：海洋环境科学。电子邮箱：gnzeng@zjut．edu．cn
