【摘要】 利用二步法合成烷基多苷硫酸酯探讨反应条件对反应的影响,优化制备条件,并对合成产物的溶解性、表面张力、临界胶团浓度、亲水亲油平衡值、乳化力和泡沫性能等理化性质进行表征。结果显示,以紫菜多糖和C10~C18脂肪醇为原料时,最适反应条件为:温度118℃,催化剂量20 g/L,脂肪醇和糖的摩尔比6∶1,反应时间3 h。不同碳链长度的APGS的亲水性随碳链的增长而减小。APGS溶液的表面张力随烷基链的增长而增大。AC12APGS的cmc点浓度为0.004 5%,C14APGS的cmc点浓度为0.005%,C16APGS的cmc点浓度为0.008%,而C16APG在浓度为0.01%以下时则未表现出cmc点。在烷基链C10~C16范围内,随烷基碳链的增长,APGS的HLB值减小,其乳化力随烷基碳链的长度增加而增大;其起泡力随碳链长度的增加而增大。合成的产物APGS是一种良好的乳化剂,为坛紫菜资源利用开辟了一条新的途径更多还原

【Abstract】 The alkyl polyglycoside produced from carbohydrates and their hydrolysates is a new kind of surfactant.Besides the qualities of general surfactants,alkyl polyglycoside as a environment-friendly surfactant is biodegradable and thus benign to environment.The research of alkyl polyglycoside and its derivatives is becoming the focus of many international studies and researches.In this study,the polysaccharides of Porphyra haitanensis from Fujian Province were extracted.Alkyl polyglycoside sulfate（APGS）,a kind of alkyl polyglycoside derivative,was produced from polysaccharides of Porphyra haitanensis through two-step method.The process for preparation of APGS was studied in detail.Prime conditions of synthesis of APGS were fixed.The physical and chemical properties of APGS were also discussed.The process was as follows:1.Polysaccharides of Porphyra haitanensis were extracted in boiling water and removed from proteins by Sevag’s means.The contents of total galactose,3,6-anhydro-galactose（3,6-AG） and sulfate were measured by chemical methods.2.Polysaccharides of Porphyra haitanensis and aliphatic alcohol were used for the synthesis of APGS.The invert rate of polyglycosides was used as the guideline and reaction temperature,amount of catalyst,polysaccharides/aliphatic alcohol ratio and time of reaction were used as the restricted factors.The optimal reaction conditions were confirmed by L₉(3⁴).The optimal temperature was 118?℃;the content catalyst was 2%;the polysaccharides/aliphatic alcohol ratio was 6∶1 and the total time of reaction was 3?h.3.The solubility,surface tension,critical micelle concentration（CMC）,hydrophilic-lipophilic balance（HLB） value,emulsifying capacity and foam property of APGS were measured.A new approach to exploit Porphyra haitanensis and to produce polysaccharides sulfated is provided.It also provids the necessary scientific evidences and set up an experimental foundation for the further research of the application of polysaccharides sulfated.[Journal of Fishery Sciences of China,2006,13（6）:980-989]更多还原