本文主要研究内容
作者张东栋（2019）在《以壳聚糖为基质的双层复合涂膜及电纺纳米纤维的研究》一文中研究指出：基于大分子聚合物制备的膜材料在保鲜领域的研究备受关注。本文分别采用层层自组装技术及静电纺丝技术制备基于壳聚糖的双层涂膜和电纺纤维膜,并添加溶菌酶,实现协同抑菌作用。以壳聚糖(CS)和海藻酸钠(ALG)两种带相反电荷的多糖为成膜基质,制备包埋溶菌酶(LZ)的ALG-CS+LZ双层复合涂膜,表征双层膜的微结构,评价膜的理化性能、抑菌性能及保鲜性能。以CS和聚乙烯醇(PVA)为基质,载入不同量LZ,制备系列LZ/CS/PVA电纺纳米纤维膜,分析纤维膜的形貌特点以及纤维膜的特性,为双层膜和电纺膜的进一步应用提供一定的理论基础。主要获得以下结果:1.采用层层自组装技术制备了ALG-CS+LZ双层复合涂膜,并对涂膜进行表征及理化性质的研究。结果表明:与CS、ALG、CS+LZ单层涂膜较光滑的表面相比,ALG-CS+LZ双层复合涂膜表面表现出明显的不规则分布和良好的立体效果,粗糙的表面有利于小分子物质的负载。双层复合涂膜横截面SEM图、FTIR谱图及XRD谱图表明ALG与CS+LZ涂层之间并非简单地叠加,而是ALG、CS、LZ分子之间存在相互作用力。双层涂膜的力学性能显著优于ALG涂膜,而接近CS+LZ涂膜;水蒸气透过率、氧气、二氧化碳透过率和透光率明显低于ALG涂膜,而接近CS+LZ涂膜。表明双层膜叠加理化性能并未降低。2.以水产优势腐败菌荧光假单胞菌和腐败希瓦氏菌为对象,研究双层复合涂膜的抑菌作用及机理。结果表明:与ALG,CS+LZ单层涂膜相比,ALG-CS+LZ双层复合涂膜对荧光假单胞菌和腐败希瓦氏菌的抑制作用更强,并且在作用初始12 h具有一定杀菌作用;双层涂膜导致细菌更多的核酸和电解质外漏,破坏细菌细胞膜的完整性,增加细胞膜通透性;并通过破坏或抑制维持细胞正常生命活动的蛋白质或酶及阻碍它们的合成等影响荧光假单胞菌、腐败希瓦氏菌生长。3.采用ALG、CS+LZ单层涂膜和ALG-CS+LZ双层复合涂膜处理大菱鲆鱼片,贮藏于4℃冰箱,每隔3天检测鱼肉中菌落总数(TVC)、pH值、挥发性盐基氮值(TVB-N)、硫代巴比妥酸(TBARS)、K值、质构、低场核磁共振分析等评测大菱鲆鱼片在冷藏期间的新鲜程度及质量的变化。结果表明:与ALG、CS+LZ单层涂膜液相比,ALG-CS+LZ双层复合涂膜更有效地抑制了大菱鲆鱼片中腐败微生物的繁殖;显著减缓了鱼片pH、TVB-N、K值等的增加;减少了鱼肉蛋白的变性和水分的散失,延长了大菱鲆鱼片的货架期4~6天。4.采用静电纺丝技术制备不同质量比的壳聚糖/聚乙烯醇纳米纤维膜(CS/PVA),在纤维形貌良好的配比溶液中添加不同含量LZ制备LZ/CS/PVA纳米纤维膜。采用SEM、FTIR、XRD及DSC等方法分析LZ/CS/PVA纤维膜形貌特点和纤维膜的特性。结果表明:LZ的添加影响了纤维形貌均匀程度及纤维之间的黏结程度;随着LZ的加入,纤维平均直径从339.62±92.72 nm(CS/PVA)降低至262.10±86.32~283.01±96.83 nm(LZ/CS/PVA系列纤维)之间;LZ添加量为0.30%和0.50%时,纤维形貌良好;纤维膜各组分之间存在强烈的相互作用,阻碍晶体的形成,致使其形成几乎无定形的结构;LZ的添加提高了纤维膜的热稳定性,熔点从185.60℃上升到189.30℃~191.00℃之间。LZ/CS/PVA纤维膜由安全无毒的材料制备而成,具有应用于食品工业的潜力。
Abstract
ji yu da fen zi ju ge wu zhi bei de mo cai liao zai bao xian ling yu de yan jiu bei shou guan zhu 。ben wen fen bie cai yong ceng ceng zi zu zhuang ji shu ji jing dian fang si ji shu zhi bei ji yu ke ju tang de shuang ceng tu mo he dian fang qian wei mo ,bing tian jia rong jun mei ,shi xian xie tong yi jun zuo yong 。yi ke ju tang (CS)he hai zao suan na (ALG)liang chong dai xiang fan dian he de duo tang wei cheng mo ji zhi ,zhi bei bao mai rong jun mei (LZ)de ALG-CS+LZshuang ceng fu ge tu mo ,biao zheng shuang ceng mo de wei jie gou ,ping jia mo de li hua xing neng 、yi jun xing neng ji bao xian xing neng 。yi CShe ju yi xi chun (PVA)wei ji zhi ,zai ru bu tong liang LZ,zhi bei ji lie LZ/CS/PVAdian fang na mi qian wei mo ,fen xi qian wei mo de xing mao te dian yi ji qian wei mo de te xing ,wei shuang ceng mo he dian fang mo de jin yi bu ying yong di gong yi ding de li lun ji chu 。zhu yao huo de yi xia jie guo :1.cai yong ceng ceng zi zu zhuang ji shu zhi bei le ALG-CS+LZshuang ceng fu ge tu mo ,bing dui tu mo jin hang biao zheng ji li hua xing zhi de yan jiu 。jie guo biao ming :yu CS、ALG、CS+LZchan ceng tu mo jiao guang hua de biao mian xiang bi ,ALG-CS+LZshuang ceng fu ge tu mo biao mian biao xian chu ming xian de bu gui ze fen bu he liang hao de li ti xiao guo ,cu cao de biao mian you li yu xiao fen zi wu zhi de fu zai 。shuang ceng fu ge tu mo heng jie mian SEMtu 、FTIRpu tu ji XRDpu tu biao ming ALGyu CS+LZtu ceng zhi jian bing fei jian chan de die jia ,er shi ALG、CS、LZfen zi zhi jian cun zai xiang hu zuo yong li 。shuang ceng tu mo de li xue xing neng xian zhe you yu ALGtu mo ,er jie jin CS+LZtu mo ;shui zheng qi tou guo lv 、yang qi 、er yang hua tan tou guo lv he tou guang lv ming xian di yu ALGtu mo ,er jie jin CS+LZtu mo 。biao ming shuang ceng mo die jia li hua xing neng bing wei jiang di 。2.yi shui chan you shi fu bai jun ying guang jia chan bao jun he fu bai xi wa shi jun wei dui xiang ,yan jiu shuang ceng fu ge tu mo de yi jun zuo yong ji ji li 。jie guo biao ming :yu ALG,CS+LZchan ceng tu mo xiang bi ,ALG-CS+LZshuang ceng fu ge tu mo dui ying guang jia chan bao jun he fu bai xi wa shi jun de yi zhi zuo yong geng jiang ,bing ju zai zuo yong chu shi 12 hju you yi ding sha jun zuo yong ;shuang ceng tu mo dao zhi xi jun geng duo de he suan he dian jie zhi wai lou ,po huai xi jun xi bao mo de wan zheng xing ,zeng jia xi bao mo tong tou xing ;bing tong guo po huai huo yi zhi wei chi xi bao zheng chang sheng ming huo dong de dan bai zhi huo mei ji zu ai ta men de ge cheng deng ying xiang ying guang jia chan bao jun 、fu bai xi wa shi jun sheng chang 。3.cai yong ALG、CS+LZchan ceng tu mo he ALG-CS+LZshuang ceng fu ge tu mo chu li da ling ping yu pian ,zhu cang yu 4℃bing xiang ,mei ge 3tian jian ce yu rou zhong jun la zong shu (TVC)、pHzhi 、hui fa xing yan ji dan zhi (TVB-N)、liu dai ba bi tuo suan (TBARS)、Kzhi 、zhi gou 、di chang he ci gong zhen fen xi deng ping ce da ling ping yu pian zai leng cang ji jian de xin xian cheng du ji zhi liang de bian hua 。jie guo biao ming :yu ALG、CS+LZchan ceng tu mo ye xiang bi ,ALG-CS+LZshuang ceng fu ge tu mo geng you xiao de yi zhi le da ling ping yu pian zhong fu bai wei sheng wu de fan shi ;xian zhe jian huan le yu pian pH、TVB-N、Kzhi deng de zeng jia ;jian shao le yu rou dan bai de bian xing he shui fen de san shi ,yan chang le da ling ping yu pian de huo jia ji 4~6tian 。4.cai yong jing dian fang si ji shu zhi bei bu tong zhi liang bi de ke ju tang /ju yi xi chun na mi qian wei mo (CS/PVA),zai qian wei xing mao liang hao de pei bi rong ye zhong tian jia bu tong han liang LZzhi bei LZ/CS/PVAna mi qian wei mo 。cai yong SEM、FTIR、XRDji DSCdeng fang fa fen xi LZ/CS/PVAqian wei mo xing mao te dian he qian wei mo de te xing 。jie guo biao ming :LZde tian jia ying xiang le qian wei xing mao jun yun cheng du ji qian wei zhi jian de nian jie cheng du ;sui zhao LZde jia ru ,qian wei ping jun zhi jing cong 339.62±92.72 nm(CS/PVA)jiang di zhi 262.10±86.32~283.01±96.83 nm(LZ/CS/PVAji lie qian wei )zhi jian ;LZtian jia liang wei 0.30%he 0.50%shi ,qian wei xing mao liang hao ;qian wei mo ge zu fen zhi jian cun zai jiang lie de xiang hu zuo yong ,zu ai jing ti de xing cheng ,zhi shi ji xing cheng ji hu mo ding xing de jie gou ;LZde tian jia di gao le qian wei mo de re wen ding xing ,rong dian cong 185.60℃shang sheng dao 189.30℃~191.00℃zhi jian 。LZ/CS/PVAqian wei mo you an quan mo du de cai liao zhi bei er cheng ,ju you ying yong yu shi pin gong ye de qian li 。
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论文作者分别是来自渤海大学的张东栋，发表于刊物渤海大学2019-10-16论文，是一篇关于壳聚糖论文,海藻酸钠论文,溶菌酶论文,层层自组装技术论文,静电纺丝论文,渤海大学2019-10-16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，资料来自渤海大学2019-10-16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：壳聚糖论文; 海藻酸钠论文; 溶菌酶论文; 层层自组装技术论文; 静电纺丝论文; 渤海大学2019-10-16论文;