海藻酸钠-纳米纤维素共混膜的制备及性能
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摘要
将纳米纤维素(NCC)添加到海藻酸钠(Alg)中共混流延制备海藻酸钠-纳米纤维素共混膜(Alg-NCC)。结果表明:NCC添加量为8%的共混膜具有最优的综合性能。相比纯Alg膜,Alg-NCC(8%)的拉伸强度提高了47.9%,断裂伸长率降低了50%,透湿量降低了22.5%,透氧量降低了10%。红外光谱分析结果表明Alg与NCC两者间存在着较强烈的分子间相互作用,X射线衍射分析结果表明NCC的加入改变了Alg的结晶排列。海藻酸钠-纳米纤维素共混膜显示出良好的力学、阻湿、阻氧和热稳定性能。
In order to improve the mechanical and barrier properties of algnate film,nanocrystalline cellulose(NCC)was added into algnate(Alg)and the blend films(Alg-NCC)with different NCC content(from 2%to 16%,w/w)were prepared by solution casting.It was found that Alg-NCC blend films with 8%(w/w)NCC content was optimum,the tensile strength increased by 47.9%,elongation at break decreased50%,water vapor permeability and oxygen permeability decreased by 22.5%and 10%,respectively,compared to the pure Alg films.FT-IR analysis suggested that molecular interactions between NCC and Alg was strong.XRD analysis results revealed that the presence of NCC changed the crystallization arrangement of Alg.AlgNCC blend films show a good mechanical property,wet resistant property,oxygen resistant property and thermal stability.
In order to improve the mechanical and barrier properties of algnate film,nanocrystalline cellulose(NCC)was added into algnate(Alg)and the blend films(Alg-NCC)with different NCC content(from 2%to 16%,w/w)were prepared by solution casting.It was found that Alg-NCC blend films with 8%(w/w)NCC content was optimum,the tensile strength increased by 47.9%,elongation at break decreased50%,water vapor permeability and oxygen permeability decreased by 22.5%and 10%,respectively,compared to the pure Alg films.FT-IR analysis suggested that molecular interactions between NCC and Alg was strong.XRD analysis results revealed that the presence of NCC changed the crystallization arrangement of Alg.AlgNCC blend films show a good mechanical property,wet resistant property,oxygen resistant property and thermal stability.
引文
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[3]冯志云,吴敏,朱昌平,等.聚乙二醇共价交联海藻酸钠凝胶制备及其药物缓释性能[J].材料科学与工程学报,2015,33(3):368~371;424.
[4]李慧,卢立新,王利强.海藻酸钠-羧甲基纤维素钠-明胶共混膜的结构及性能研究[J].食品科学,2010,31(5):91~95.
[5]陈佳林,黄晨,许云辉.丝素-海藻酸钠-甘油共混膜的制备及性能研究[J].安徽农业大报,2013,40(2):321~325.
[6]贾军芳,崔莉.聚乳酸/海藻酸钠共混膜的制备及性能研究[J].武汉纺织大学学报,2012,25(3):43~46.
[7]李娜,刘文洁,罗虎.纤维素/海藻酸钠共混膜的制备及力学性能[J].合成纤维工业,2013,36(4):34~37;41.
[8]刘翠云,高喜平,黄宇,等.NCC改性海藻酸钠可降解复合膜的制备及性能研究[J].化工新型材料,2015,43(6):80~82.
[9]Huq T,Salmieri S,Khan A,et al.Nanocrystalline cellulose(NCC)reinforced alginate based biodegradable nanocomposite film.[J].Carbohydrate Polymers,2012,90(4):1757~1763.
[10]刘忠明,董峰,王小林,等.纳米纤维素/壳聚糖复合膜的制备和性能[J].包装工程,2016,37(17):75~79.
[11]谭卫琳,张琦,何健新,等.丝素/纳米纤维素晶须/壳聚糖多孔复合支架的应用[J].材料科学与工程学报,2015,33(6):868~872.
[12]李肖建,刘红霞,韦春,等.剑麻纤维素微晶的制备与表征[J].高分子材料科学与工程,2012,28(8):160~162,166.
[13]袁恒森.食品包装用纤维素膜的制备与性能研究[D].大连:大连工业大学,2012.
[14]Butler B L,Vergano P J,Testin R F,et al.Mechanical and barrier properties of edible chitosan films as affected by bomposition and storage[J].Journal of Food Science,1996,61(5):953~956.
[15]Park S,Baker J O,Himmelm E,et al.Cellulose crystallinity index:Measurement techniques and their impact on interpreting cellulose performance[J].Biotechnology for Biofuels,2010,3(1):103~111.
[16]Wang L F,Shankar S,Rhim J W.Properties of alginate-based films reinforced with cellulose fibers and cellulose nanowhiskers isolated from mulberry pulp[J].Food Hydrocolloids,2017,63:201~208.
[17]Shankar S,Rhim J.W.Preparation of nanocellulose from microcrystalline cellulose:The effect on the performance and properties of agar-based composite films[J].Carbohydrate Polymers,2016,135:18~26.
[18]Shankar S,Rhim J.W.Amino acid mediated synthesis of silver nanoparticles and preparation of antimicrobial agar/silver nanoparticles composite films[J].Carbohydrate Polymers,2015,130:149~156.