以棉纤维素为原料,以NMMO(N-甲基吗啉-N-氧化物)为溶剂,以甘油为增塑剂制取天然纯纤维素包装膜,研究了不同甘油含量对纤维素膜性能的影响。结果表明,随着甘油含量的增加,纤维素膜的断裂伸长率随之增加,拉伸强度随之降低,二者变化幅度都很大;当甘油含量从2%增加到5%,纤维素膜的透油系数增加了13.4%,氧气透过率增加了3.0%,透湿系数增加了16.7%,透光率增加了22.4%,横向热收缩率增加了58.8%,纵向热收缩率增加了54.7%。可见,甘油含量对膜的透氧性影响较为微弱,但对力学性能、透油性、透湿性、透明度、热收缩率影响均较为显著。
Natural pure cellulose packaging films were prepared by means of the dissolution of cotton cellulose in NMMO and glycerol was used as plasticizer,the effects of different glycerol concentration on properties were studied,the results showed that elongation at break increase,but the tensile strength decrease with the increasing of glycerol concentration,and both change significantly;when the content increased from 2% to 5%,the oil transmission,oxygen permeation flux,water vapor permeability,the light transmittance,the transverse and longitudinal direction hot shrinkage rate increased by 13.4%,3.0%,16.7%,22.4%,58.8%,54.7%,respectively.It's clear that glycerol concentration had weak influence on oxygen permeation,but the mechanical properties,the oil permeability,the water vapor permeability,the transparency and hot shrinkage rate changed significantly.
参考文献
[1] | Yang Zhili;Wang Qingrui.Cellulose and viscose fi- bers (Volume I )[M].Beijing:Textile Technology Press,1981:17-18. |
[2] | 张传杰,王柳,王治凯,薛青芳,朱平.3种生物纤维素膜的结构与性能[J].功能材料,2011(z4):617-620. |
[3] | 李丽丽,王铎.醋酸纤维素正渗透膜的制备及其性能研究[J].功能材料,2012(05):595-598. |
[4] | Thomas Rosenau;Antje Potthast;Immanuel Adorjan;Andreas Hofinger;Herbert Sixta;Heinrich Firgo;Paul Kosma .Cellulose solutions in N-methylmorpholine-N-oxide (NMMO)-degradation processes and stabilizers[J].Cellulose,2002(3/4):283-291. |
[5] | Zhang Yaopeng;Shao Huili;Shen Yiyi.Environment- friendly cellulose membrane prepared by NMMO[J].Textile Technology Overseas,2000(04):1-4. |
[6] | Donhowe I G;Fennema O .The effects of plasticizers on crystallinity,permeability and mechanical properties on methylcellulose films[J].Journal of Food Processing and Preservation,1993,17(04):247-257. |
[7] | Turhan;Nazan K;Sancak et al.Optimization of glycerol effect on the mechanical pro-perties and water vapor per- meability of whey protein methylcellulose films[J].Jour- nal of Food Processe Engineering,2007,30(04):485-500. |
[8] | Muhammad Imran;Soumaya El-Fahmy;Anne-Marie Revol-Junelles .Cellulose derivative based active coatings: Effects of nisin and plasticizer on physico-chemical and antimicrobial properties of hydroxypropyl methylcellulose films[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2010(2):219-225. |
[9] | Azeredo H M C;Luiz Heneique C;Mattoso et al.Nano- cellulose reinforced ehitosan composite films as affected by nanofiller loading and plasticizer content[J].Journal of Food Science,2 010,7 5(01):N1-N7. |
[10] | Zhang Li;Wang Jianqing .Preparation and application of cellulose films by NMMO[J].Plastics Packaging,2008,18(04):33-35. |
[11] | 王建清,张莉.NMMO法纤维素膜的制备及力学性能[J].天津科技大学学报,2008(04):9-13. |
[12] | Nazan T K;Ferhunde S .Tensile properties and solubili- ty of methyleellulose based edible films[J].Journal of Food Engineering,2004,61(03):459-466. |
[13] | Yao Weizhong .Studies of cellulose films by NMMO[D].Shanghai.-Master Thesis of Donghua University,2003. |
- 下载量()
- 访问量()
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%