Page 52 - 精细化工2019年第9期
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第 36 卷第 9 期                             精   细   化   工                                  Vol.36, No.9
             201 9 年 9 月                             FINE CHEMICALS                                 Sept.    2019


              功能材料
                海藻酸辛酯衍生物载药微纳米胶束的合成及释药性



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                     冯美西      1,2 ,王艳芳 ,陈秀琼 ,窦文杰 ,颜慧琼                              1,2* ,林   强    1,2
                 (1.  海南师范大学  热带药用资源化学教育部重点实验室,海南  海口    571158;2.  海南师范大学  海南省
                 水环境污染治理与资源化重点实验室,海南  海口    571158)

                 摘要:为了拓宽海藻酸盐的应用范围,以 1-溴辛烷为疏水改性剂,采用双分子亲核取代反应(SN 2 )制备海藻酸
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                 辛酯衍生物(OAD),通过 FTIR、 HNMR 对其结构进行了鉴定,并采用 TGA、XRD、荧光光谱(FM)、表面
                 张力(SFT)、TEM、激光粒度和 Zeta 电位分析仪对其性能进行了表征。结果表明,辛基侧链的接枝使 OAD 的
                 分子内氢键断裂,热稳定性下降,失重率增大,同时伴随微晶结构的改变。并且海藻酸钠(SA)与 OAD 的临
                 界聚集质量浓度(CAC)分别为 1.09 和 0.34 g/L,其 SFT 也随浓度的增大而逐步降低。相比 SA,OAD 胶束的
                 水动力学粒径(d H )由 446.7 nm 变为 342.0 nm,Zeta 电位由-36.4 mV 降为-39.3 mV,说明 OAD 具有一定的
                 胶体界面活性。OAD 胶束对负载的布洛芬具有一定的缓释作用,药物的释放过程属于 Non-Fickian 扩散机制。
                 关键词:双分子亲核取代反应;海藻酸辛酯衍生物;临界聚集浓度;微纳米胶束;缓释性能;功能材料
                 中图分类号:O636.1;R943      文献标识码:A      文章编号:1003-5214 (2019) 09-1780-08


                  Synthesis and Release Properties of Drug-loaded Micro-/Nano-micelles
                                        Based on Octyl Alginate Derivative


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                                         1,2
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                             FENG Mei-xi , WANG Yan-fang , CHEN Xiu-qiong , DOU Wen-jie ,
                                                                         1,2
                                              YAN Hui-qiong 1,2* , LIN Qiang
                 (1. Key Laboratory of Tropical Medicinal Resource Chemistry of Ministry of Education, Hainan Normal University,
                 Haikou  571158,  Hainan, China;  2.  Key Laboratory of Water  Pollution Treatment and Resource Reuse of Hainan
                 Province, Hainan Normal University, Haikou 571158, Hainan, China)
                 Abstract:  In  order  to  broaden  the  application  range  of  alginate,  an  octylalginate  derivative  (OAD)  was
                 prepared  by  bimolecular  nucleophilic  substitution  reaction  (SN2)  using  1-bromooctane  as  hydrophobic
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                 modifier.  Its  structure  and  properties  were  characterized  by  means  of  FTIR,  HNMR,  TGA,  XRD,
                 fluorescence spectrum (FM), surface tension (SFT), TEM, laser particle and zeta potential analyzers. The
                 results showed that the graft of octyl side chains led to the fracture of the intramolecular hydrogen bond of
                 OAD,  the  decrease  of  its  thermal  stability,  the  increase  of  its  weight  loss  rate  and  the  change  of  its
                 microcrystalline  structure.  In  addition,  the  critical  aggregation  mass  concentration  (CAC)  of  sodium
                 alginate (SA) and OAD were 1.09 and 0.34 g/L, respectively. Meanwhile, the SFT gradually decreased as
                 the  concentration  increased.  Compared  with  those  of  SA,  the  hydrodynamic  particle  size  (d H)  of  OAD
                 decreased  from  446.7  nm  to  342.0  nm  and  the  zeta  potential  decreased  from  36.4  mV  to  39.3  mV,
                 indicating that OAD possessed certain colloidal interfacial activity. The ibuprofen-loaded OAD micelles had
                 certain  sustained-release  properties,  and  the  drug  release  process  was  fitted  well  with  the  Non-Fickian
                 diffusion model.
                 Key words: bimolecular nucleophilic substitution reaction; octyl alginate derivative; critical aggregation
                 concentration; micro-/nano-capsules; sustained-release property; functional materials



                 收稿日期:2018-12-19;  定用日期:2019-03-15; DOI: 10.13550/j.jxhg.20180926
                 基金项目:海南省高等学校科学研究项目(Hnky2019-36);海南省自然科学基金项目(218QN233);海南省研究生创新科研课题资助
                 项目(Hys2018-207)
                 作者简介:冯美西(1991—),女,硕士生。联系人:颜慧琼(1986—),男,讲师,博士,E-mail:yanhqedu@163.com。
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