本文主要研究内容
作者张佳斌（2019）在《江蓠琼脂提取与顺丁烯二酸酐酯化琼脂制备工艺及其应用》一文中研究指出：琼脂是一种天然水溶性高分子多糖,因其具有独特的凝固性和凝固稳定性,常被用做增稠剂、乳化剂、悬浮剂和凝胶剂,广泛应用于食品、日化、医药化工等领域。为解决琼脂在碱法提取过程中胶质流失、得率低、污染大以及琼脂凝胶透明度低而造成其应用范围窄等问题,本文在碱法、酶法和酶法辅助提取工艺基础上,分析三种提取工艺过程中江蓠藻体变化趋势,为指导琼脂生产提供理论依据;计算江蓠藻损失率、琼脂得率、考察琼脂指标差异,为提高琼脂得率、减少生产损耗提供指导。然后以顺丁烯二酸酐为酯化剂对琼脂进行湿法改性,旨在保证琼脂基本性质的前提下提升琼脂凝胶透明度,为琼脂衍生物制备方法提供思路。最后将改性琼脂应用到微胶囊技术(作为壁材)领域,拓宽琼脂及其衍生物应用范围。首先,以未处理江蓠藻做参照,对碱法、酶法和酶法辅助提取工艺进行比较,考察三种提取工艺过程对江蓠藻体、江蓠损失率、琼脂得率等各项指标的差异。研究发现:纤维素酶只酶解、软化细胞壁,不会作用于其他物质;碱处理会破坏细胞壁,溶解胶质物,可作用于多糖分子脱除硫酸基团形成3,6-内醚-半乳糖,提高琼脂凝胶强度;酸、漂白处理会进一步软化江蓠,便于琼脂的提取。随着琼脂提取工艺过程的进行,江蓠藻体逐渐被破坏,原有的厚质细胞壁被去除,裸露出包裹胶质的皮层细胞;碱法提取工艺中,江蓠藻损失率为63.0%、琼脂得率为12.3%,凝胶强度为760.6 g/cm~2。与碱法提取工艺相比,酶法提取工艺(酶处理、酸处理和漂白处理)未经碱处理,硫酸基团含量较高(3.4%),凝胶强度低(358.1 g/cm~2)、琼脂得率高(28.5%)、江蓠藻损失率低(22.6%)。与碱法提取工艺相比,酶法辅助工艺(酶处理、碱处理、酸处理和漂白处理)采用纤维素酶对江蓠藻进行预处理,江蓠藻损失率降低(45.9%),琼脂得率升高(20.3%),低浓度碱(3%)处理后,硫酸基团下降(1.9%),凝胶强度增加(695.7 g/cm~2)。碱法提取工艺所得琼脂的白度、透明度、溶点、凝固温度和融化温度高于酶法辅助和酶法提取工艺;三种提取工艺所得琼脂粘度(18~20 cP)均高于未处理样品(9.3 cP)。其次,以顺丁烯二酸酐为酯化剂,氢氧化钠为催化剂,对琼脂进行湿法改性,以获得高透明度的顺丁烯二酸酐酯化琼脂。通过单因素实验得到最佳制备工艺为:顺丁烯二酸酐添加量2%、反应pH 7-7.5、反应温度30℃、琼脂浓度9%、滴加时间1 h、继续反应时间0 h。最佳工艺条件下,顺丁烯二酸酐酯化琼脂透明度从51%提升至79%,凝胶强度为867.4g/cm~2;溶胀性、乳化性改善;白度、3,6-内醚-半乳糖、硫酸基团、凝固温度、融化温度和溶解温度略有下降。FTIR测试结果显示顺丁烯二酸酐酯化琼脂出现新的酯基吸收峰,顺丁烯二酸酐与琼脂酯化成功;TG测试结果显示顺丁烯二酸酐酯化琼脂稳定性下降,保水性增加。最后,采用锐孔-凝固浴法,以顺丁烯二酸酐酯化琼脂为微胶囊壁材,大豆油为包埋芯材,制备酯化琼脂微胶囊。通过单因素实验得到最佳的酯化琼脂微胶囊制备工艺为:酯化琼脂(壁材)浓度1.5%、芯材含量8 mL、干燥温度60℃、鼓风干燥方式。最佳工艺条件下,酯化琼脂微胶囊粒径为0.14 cm、载油率为56.3%、包埋率99.1%。在此工艺条件下,对DHA进行微胶囊化,对比不同芯材的乳液稳定性,得到粒径为0.15 cm、载油率为62.2%和包埋率为99.2%的酯化琼脂-DHA微胶囊。加速氧化7 d试验结果显示,酯化琼脂-DHA微胶囊过氧化值(67.4 mmoL/kg)明显低于未包埋DHA(860.1 mmoL/kg)的过氧化值,酯化琼脂-DHA微胶囊贮藏稳定性显著提高。
Abstract
qiong zhi shi yi chong tian ran shui rong xing gao fen zi duo tang ,yin ji ju you du te de ning gu xing he ning gu wen ding xing ,chang bei yong zuo zeng chou ji 、ru hua ji 、xuan fu ji he ning jiao ji ,an fan ying yong yu shi pin 、ri hua 、yi yao hua gong deng ling yu 。wei jie jue qiong zhi zai jian fa di qu guo cheng zhong jiao zhi liu shi 、de lv di 、wu ran da yi ji qiong zhi ning jiao tou ming du di er zao cheng ji ying yong fan wei zhai deng wen ti ,ben wen zai jian fa 、mei fa he mei fa fu zhu di qu gong yi ji chu shang ,fen xi san chong di qu gong yi guo cheng zhong jiang li zao ti bian hua qu shi ,wei zhi dao qiong zhi sheng chan di gong li lun yi ju ;ji suan jiang li zao sun shi lv 、qiong zhi de lv 、kao cha qiong zhi zhi biao cha yi ,wei di gao qiong zhi de lv 、jian shao sheng chan sun hao di gong zhi dao 。ran hou yi shun ding xi er suan gan wei zhi hua ji dui qiong zhi jin hang shi fa gai xing ,zhi zai bao zheng qiong zhi ji ben xing zhi de qian di xia di sheng qiong zhi ning jiao tou ming du ,wei qiong zhi yan sheng wu zhi bei fang fa di gong sai lu 。zui hou jiang gai xing qiong zhi ying yong dao wei jiao nang ji shu (zuo wei bi cai )ling yu ,ta kuan qiong zhi ji ji yan sheng wu ying yong fan wei 。shou xian ,yi wei chu li jiang li zao zuo can zhao ,dui jian fa 、mei fa he mei fa fu zhu di qu gong yi jin hang bi jiao ,kao cha san chong di qu gong yi guo cheng dui jiang li zao ti 、jiang li sun shi lv 、qiong zhi de lv deng ge xiang zhi biao de cha yi 。yan jiu fa xian :qian wei su mei zhi mei jie 、ruan hua xi bao bi ,bu hui zuo yong yu ji ta wu zhi ;jian chu li hui po huai xi bao bi ,rong jie jiao zhi wu ,ke zuo yong yu duo tang fen zi tuo chu liu suan ji tuan xing cheng 3,6-nei mi -ban ru tang ,di gao qiong zhi ning jiao jiang du ;suan 、piao bai chu li hui jin yi bu ruan hua jiang li ,bian yu qiong zhi de di qu 。sui zhao qiong zhi di qu gong yi guo cheng de jin hang ,jiang li zao ti zhu jian bei po huai ,yuan you de hou zhi xi bao bi bei qu chu ,luo lou chu bao guo jiao zhi de pi ceng xi bao ;jian fa di qu gong yi zhong ,jiang li zao sun shi lv wei 63.0%、qiong zhi de lv wei 12.3%,ning jiao jiang du wei 760.6 g/cm~2。yu jian fa di qu gong yi xiang bi ,mei fa di qu gong yi (mei chu li 、suan chu li he piao bai chu li )wei jing jian chu li ,liu suan ji tuan han liang jiao gao (3.4%),ning jiao jiang du di (358.1 g/cm~2)、qiong zhi de lv gao (28.5%)、jiang li zao sun shi lv di (22.6%)。yu jian fa di qu gong yi xiang bi ,mei fa fu zhu gong yi (mei chu li 、jian chu li 、suan chu li he piao bai chu li )cai yong qian wei su mei dui jiang li zao jin hang yu chu li ,jiang li zao sun shi lv jiang di (45.9%),qiong zhi de lv sheng gao (20.3%),di nong du jian (3%)chu li hou ,liu suan ji tuan xia jiang (1.9%),ning jiao jiang du zeng jia (695.7 g/cm~2)。jian fa di qu gong yi suo de qiong zhi de bai du 、tou ming du 、rong dian 、ning gu wen du he rong hua wen du gao yu mei fa fu zhu he mei fa di qu gong yi ;san chong di qu gong yi suo de qiong zhi nian du (18~20 cP)jun gao yu wei chu li yang pin (9.3 cP)。ji ci ,yi shun ding xi er suan gan wei zhi hua ji ,qing yang hua na wei cui hua ji ,dui qiong zhi jin hang shi fa gai xing ,yi huo de gao tou ming du de shun ding xi er suan gan zhi hua qiong zhi 。tong guo chan yin su shi yan de dao zui jia zhi bei gong yi wei :shun ding xi er suan gan tian jia liang 2%、fan ying pH 7-7.5、fan ying wen du 30℃、qiong zhi nong du 9%、di jia shi jian 1 h、ji xu fan ying shi jian 0 h。zui jia gong yi tiao jian xia ,shun ding xi er suan gan zhi hua qiong zhi tou ming du cong 51%di sheng zhi 79%,ning jiao jiang du wei 867.4g/cm~2;rong zhang xing 、ru hua xing gai shan ;bai du 、3,6-nei mi -ban ru tang 、liu suan ji tuan 、ning gu wen du 、rong hua wen du he rong jie wen du lve you xia jiang 。FTIRce shi jie guo xian shi shun ding xi er suan gan zhi hua qiong zhi chu xian xin de zhi ji xi shou feng ,shun ding xi er suan gan yu qiong zhi zhi hua cheng gong ;TGce shi jie guo xian shi shun ding xi er suan gan zhi hua qiong zhi wen ding xing xia jiang ,bao shui xing zeng jia 。zui hou ,cai yong rui kong -ning gu yu fa ,yi shun ding xi er suan gan zhi hua qiong zhi wei wei jiao nang bi cai ,da dou you wei bao mai xin cai ,zhi bei zhi hua qiong zhi wei jiao nang 。tong guo chan yin su shi yan de dao zui jia de zhi hua qiong zhi wei jiao nang zhi bei gong yi wei :zhi hua qiong zhi (bi cai )nong du 1.5%、xin cai han liang 8 mL、gan zao wen du 60℃、gu feng gan zao fang shi 。zui jia gong yi tiao jian xia ,zhi hua qiong zhi wei jiao nang li jing wei 0.14 cm、zai you lv wei 56.3%、bao mai lv 99.1%。zai ci gong yi tiao jian xia ,dui DHAjin hang wei jiao nang hua ,dui bi bu tong xin cai de ru ye wen ding xing ,de dao li jing wei 0.15 cm、zai you lv wei 62.2%he bao mai lv wei 99.2%de zhi hua qiong zhi -DHAwei jiao nang 。jia su yang hua 7 dshi yan jie guo xian shi ,zhi hua qiong zhi -DHAwei jiao nang guo yang hua zhi (67.4 mmoL/kg)ming xian di yu wei bao mai DHA(860.1 mmoL/kg)de guo yang hua zhi ,zhi hua qiong zhi -DHAwei jiao nang zhu cang wen ding xing xian zhe di gao 。
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论文作者分别是来自集美大学的张佳斌，发表于刊物集美大学2019-07-12论文，是一篇关于江蓠论文,琼脂提取论文,顺丁烯二酸酐酯化论文,微胶囊论文,集美大学2019-07-12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，资料来自集美大学2019-07-12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。
标签：江蓠论文; 琼脂提取论文; 顺丁烯二酸酐酯化论文; 微胶囊论文; 集美大学2019-07-12论文;