本文主要研究内容
作者侯丹（2019）在《三种不同的多糖—海藻酸钠—茶多酚缓释微胶囊的制备与研究》一文中研究指出：茶叶具有抗氧化、抗肿瘤、抗辐射、抗菌、降血糖、降血脂和增强机体免疫力等生理功能,这与茶叶中富含茶多酚、咖啡碱、茶多糖、茶色素和茶氨酸等多种功效成分密不可分。其中,茶多酚具有多种功效也是使茶叶中的主要成分。由于茶多酚具备多种生物调节功效,是食品、医药、饲料及日用化工等领域研究和开发热点,具有广阔的应用前景。然而,茶多酚稳定性差,其结构中含有大量的活性酚羟基,在中性、碱性环境下易降解;在高温、潮湿和光照等不适宜的环境条件下也易发生氧化聚合、异构化等反应,使其原有的生物活性发生改变,因而非保护状态下,生物利用率较低。微胶囊技术是一种可有效的提升茶多酚稳定性的方法。茶多酚微胶囊化是利用天然的或合成的高分子材料为壁材,以茶多酚作为芯材,将其包埋形成微胶囊。包埋后的茶多酚可最大限度的保持其生理活性、稳定性、提高其缓释性、减少使用量。因此运用微胶囊技术包埋茶多酚,对其生物活性的保持、贮藏以及应用具有重要意义。本文使用芯材茶多酚、基础壁材海藻酸钠,分别以三种不同电荷性质的多糖——阿拉伯树胶粉,菊粉和壳聚糖作为复配壁材,并利用CaCl2作为固定液,制备出了茶多酚微胶囊。使用扫描电子显微镜表征分析了微胶囊的整体形状及外表面构造。对不同壁材制备出的茶多酚微胶囊进行了质量评价,研讨了不同复配壁材对茶多酚包埋率、消化释放及贮藏稳定性等的影响。主要研究内容和结果如下:（1）挤压法制备出颗粒均匀、呈圆球型的微胶囊。未冻干时,微胶囊的平均粒径在2.122.66mm之间;平均含水量均在90%以上。质构分析得出,海藻酸钠-壳聚糖-茶多酚微胶囊的硬度、胶黏性、咀嚼性、弹性、回复性和内聚性均大于其他三种茶多酚微胶囊。冻干后的微胶囊,整体形状仍为球形或椭圆形,其表面形貌发生较大变化,出现褶皱、凹陷坍塌或者裂纹。冻干微胶囊在水溶液中吸水溶胀2h、4h和6h后,溶胀率均大于1,且溶胀率均随时间的增加逐渐上升,说明冻干后仍具有一定的吸水膨胀能力。（2）利用福林酚比色法计算得出,A+Chi-TP微胶囊包埋率最高,为57.76%。通过HPLC检测得出,EGCG和ECG均在海藻酸钠-壳聚糖-茶多酚微胶囊中含量最高,分别为1.47mg/g beads和0.35mg/g beads,而EGC和EC均在海藻酸钠-阿拉伯树胶粉-茶多酚微胶囊中含量最高,分别为0.40mg/g beads和0.35mg/g beads。FTIR实验结果表明:发生氢键相互作用,证明了茶多酚被包埋。（3）茶多酚微胶囊在不同载体中（水中、胃、肠模拟液、pH2和pH7.5水溶液中）释放试验结果表明,在不同载体中茶多酚微胶囊均具备一定的缓释作用。福林酚法检测水中、胃、肠模拟液、pH2和pH7.5水溶液释放后四种茶多酚微胶囊中总酚剩余含量,结果表明,四种茶多酚微胶囊在不同载体中释放后均已剩余较少的茶多酚。但不同载体中释放后,海藻酸钠-壳聚糖-茶多酚微胶囊中的茶多酚剩余量均最高。HPLC检测结果表明,四种茶多酚微胶囊在不同载体中释放后,各组分含量均明显下降,且有部分儿茶素未能被检测到。（4）未被包埋的茶多酚粉末在贮藏期内的保留率明显低于茶多酚微胶囊中的多酚保留率。复配制备的茶多酚微胶囊在贮藏过程中茶多酚保留率更高,稳定性更好。未被包埋的茶多酚粉末在贮藏期内的水分活度明显高于茶多酚微胶囊的水分活度。复配制备的茶多酚微胶囊在贮藏过程中水分活度增量较低,贮藏期更长。
Abstract
cha xie ju you kang yang hua 、kang zhong liu 、kang fu she 、kang jun 、jiang xie tang 、jiang xie zhi he zeng jiang ji ti mian yi li deng sheng li gong neng ,zhe yu cha xie zhong fu han cha duo fen 、ga fei jian 、cha duo tang 、cha se su he cha an suan deng duo chong gong xiao cheng fen mi bu ke fen 。ji zhong ,cha duo fen ju you duo chong gong xiao ye shi shi cha xie zhong de zhu yao cheng fen 。you yu cha duo fen ju bei duo chong sheng wu diao jie gong xiao ,shi shi pin 、yi yao 、si liao ji ri yong hua gong deng ling yu yan jiu he kai fa re dian ,ju you an kuo de ying yong qian jing 。ran er ,cha duo fen wen ding xing cha ,ji jie gou zhong han you da liang de huo xing fen qiang ji ,zai zhong xing 、jian xing huan jing xia yi jiang jie ;zai gao wen 、chao shi he guang zhao deng bu kuo yi de huan jing tiao jian xia ye yi fa sheng yang hua ju ge 、yi gou hua deng fan ying ,shi ji yuan you de sheng wu huo xing fa sheng gai bian ,yin er fei bao hu zhuang tai xia ,sheng wu li yong lv jiao di 。wei jiao nang ji shu shi yi chong ke you xiao de di sheng cha duo fen wen ding xing de fang fa 。cha duo fen wei jiao nang hua shi li yong tian ran de huo ge cheng de gao fen zi cai liao wei bi cai ,yi cha duo fen zuo wei xin cai ,jiang ji bao mai xing cheng wei jiao nang 。bao mai hou de cha duo fen ke zui da xian du de bao chi ji sheng li huo xing 、wen ding xing 、di gao ji huan shi xing 、jian shao shi yong liang 。yin ci yun yong wei jiao nang ji shu bao mai cha duo fen ,dui ji sheng wu huo xing de bao chi 、zhu cang yi ji ying yong ju you chong yao yi yi 。ben wen shi yong xin cai cha duo fen 、ji chu bi cai hai zao suan na ,fen bie yi san chong bu tong dian he xing zhi de duo tang ——a la bai shu jiao fen ,ju fen he ke ju tang zuo wei fu pei bi cai ,bing li yong CaCl2zuo wei gu ding ye ,zhi bei chu le cha duo fen wei jiao nang 。shi yong sao miao dian zi xian wei jing biao zheng fen xi le wei jiao nang de zheng ti xing zhuang ji wai biao mian gou zao 。dui bu tong bi cai zhi bei chu de cha duo fen wei jiao nang jin hang le zhi liang ping jia ,yan tao le bu tong fu pei bi cai dui cha duo fen bao mai lv 、xiao hua shi fang ji zhu cang wen ding xing deng de ying xiang 。zhu yao yan jiu nei rong he jie guo ru xia :（1）ji ya fa zhi bei chu ke li jun yun 、cheng yuan qiu xing de wei jiao nang 。wei dong gan shi ,wei jiao nang de ping jun li jing zai 2.122.66mmzhi jian ;ping jun han shui liang jun zai 90%yi shang 。zhi gou fen xi de chu ,hai zao suan na -ke ju tang -cha duo fen wei jiao nang de ying du 、jiao nian xing 、ju jiao xing 、dan xing 、hui fu xing he nei ju xing jun da yu ji ta san chong cha duo fen wei jiao nang 。dong gan hou de wei jiao nang ,zheng ti xing zhuang reng wei qiu xing huo tuo yuan xing ,ji biao mian xing mao fa sheng jiao da bian hua ,chu xian zhe zhou 、ao xian tan ta huo zhe lie wen 。dong gan wei jiao nang zai shui rong ye zhong xi shui rong zhang 2h、4hhe 6hhou ,rong zhang lv jun da yu 1,ju rong zhang lv jun sui shi jian de zeng jia zhu jian shang sheng ,shui ming dong gan hou reng ju you yi ding de xi shui peng zhang neng li 。（2）li yong fu lin fen bi se fa ji suan de chu ,A+Chi-TPwei jiao nang bao mai lv zui gao ,wei 57.76%。tong guo HPLCjian ce de chu ,EGCGhe ECGjun zai hai zao suan na -ke ju tang -cha duo fen wei jiao nang zhong han liang zui gao ,fen bie wei 1.47mg/g beadshe 0.35mg/g beads,er EGChe ECjun zai hai zao suan na -a la bai shu jiao fen -cha duo fen wei jiao nang zhong han liang zui gao ,fen bie wei 0.40mg/g beadshe 0.35mg/g beads。FTIRshi yan jie guo biao ming :fa sheng qing jian xiang hu zuo yong ,zheng ming le cha duo fen bei bao mai 。（3）cha duo fen wei jiao nang zai bu tong zai ti zhong （shui zhong 、wei 、chang mo ni ye 、pH2he pH7.5shui rong ye zhong ）shi fang shi yan jie guo biao ming ,zai bu tong zai ti zhong cha duo fen wei jiao nang jun ju bei yi ding de huan shi zuo yong 。fu lin fen fa jian ce shui zhong 、wei 、chang mo ni ye 、pH2he pH7.5shui rong ye shi fang hou si chong cha duo fen wei jiao nang zhong zong fen sheng yu han liang ,jie guo biao ming ,si chong cha duo fen wei jiao nang zai bu tong zai ti zhong shi fang hou jun yi sheng yu jiao shao de cha duo fen 。dan bu tong zai ti zhong shi fang hou ,hai zao suan na -ke ju tang -cha duo fen wei jiao nang zhong de cha duo fen sheng yu liang jun zui gao 。HPLCjian ce jie guo biao ming ,si chong cha duo fen wei jiao nang zai bu tong zai ti zhong shi fang hou ,ge zu fen han liang jun ming xian xia jiang ,ju you bu fen er cha su wei neng bei jian ce dao 。（4）wei bei bao mai de cha duo fen fen mo zai zhu cang ji nei de bao liu lv ming xian di yu cha duo fen wei jiao nang zhong de duo fen bao liu lv 。fu pei zhi bei de cha duo fen wei jiao nang zai zhu cang guo cheng zhong cha duo fen bao liu lv geng gao ,wen ding xing geng hao 。wei bei bao mai de cha duo fen fen mo zai zhu cang ji nei de shui fen huo du ming xian gao yu cha duo fen wei jiao nang de shui fen huo du 。fu pei zhi bei de cha duo fen wei jiao nang zai zhu cang guo cheng zhong shui fen huo du zeng liang jiao di ,zhu cang ji geng chang 。
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论文作者分别是来自湖北工业大学的侯丹，发表于刊物湖北工业大学2019-07-18论文，是一篇关于茶多酚论文,微胶囊论文,包埋论文,释放论文,贮藏论文,湖北工业大学2019-07-18论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自湖北工业大学2019-07-18论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。