摘要
以微晶纤维素、没食子酸为原料,在催化剂的作用下,采用直接酯化法合成没食子酸微晶纤维素酯。在单因素试验的基础上,对合成时间、温度、催化剂用量、没食子酸和微晶纤维素用量比等因素进行正交试验,确定最佳合成条件为:没食子酸和微晶纤维素的反应物配比(GA:MCC)为4:1(m/m)时,以磷钨酸为催化剂,催化剂用量为相对于没食子酸质量的10%,在温度120℃条件下反应10h。产物具有清除烷基自由基、羟自由基、超氧阴离子自由基的能力,其DPPH自由基清除率达到80%以上。
Galloylmicrocrystalline cellulose gallate was synthesized using microcrystalline cellulose（MCC） and gallic acid（GA） as materials at the aid of catalyst.The optimal condition for synthesis was obtained through orthogonal experiments to be 4：1 of GA and MCC,phosphotungstic acid as the catalyst,10% catalyst based on the amount of gallic acid,reaction at 120 ℃ for 10 h.Products had strong scavenging capability for alkyl free radicals,hydroxyl free radicals and superoxide anion free radicals.The scavenging rate of DPPH free radicals was more than 80%.These investigations will provide fundamental supports for developing anti-oxidative functional materials.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2009年第22期149-152,共4页
Food Science
基金
教育部高等学校博士学科点专项科研基金项目(200602258)
黑龙江省教育厅科学技术面上研究项目(11541078)
关键词
没食子酸微晶纤维素酯
抗氧化剂
制备
性能
galloylmicrocrystalline cellulose gallate
antioxidant
synthesis
propertie
