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纤维素纳米纤丝/普鲁兰酶体系对淀粉膜性能的影响研究 |
Effects of Cellulose Nanofibril/Pullulanase System on the Performance of Starch Film |
收稿日期:2024-03-22 |
DOI:10.11980/j.issn.0254-508X.2024.09.001 |
关键词: 淀粉 普鲁兰酶 纤维素纳米纤丝 淀粉膜 |
Key Words:starch pullulanase cellulose nanofibril starch film |
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摘要:本研究分析了纤维素纳米纤丝(CNF)/普鲁兰酶(Pul)体系对淀粉膜性能的影响。结果表明,CNF/Pul体系处理后的淀粉具有更高的短程有序性及更多的双螺旋结构,且淀粉晶型中出现了B型特征峰。CNF/Pul体系处理后得到的淀粉膜具有良好的表面均匀性和机械性能,该膜的拉伸强度从2.44 MPa(Nature-StF)增至7.32 MPa(CNF/Pul-StF),增加了2倍。光/水蒸气透过率测试结果表明,CNF/Pul体系处理后的淀粉膜具有更好的光学透过性,且对水蒸气阻隔性能有一定的增强作用。CNF/Pul体系处理后淀粉膜的光学透过率从49.3%~51.2%(Nature-StF)增至56.1%~60.1%(CNF/Pul-StF),且水蒸气透过系数从9.26×10-12 g·cm/(Pa·s·cm2)(Nature-StF)减至6.33×10-12 g·cm/(Pa·s·cm2)(CNF/Pul-StF)。 |
Abstract:This study analyzed the effect of cellulose nanofibril(CNF)/pullulanase(Pul)system on the performance of starch film. The results showed that the CNF/Pul treated starch exhibited higher short-range orderliness and more double helix structure,and there were additional B-type typical peaks existing in the treated starch. The obtained starch film with CNF/Pul treatment had good surface uniformity and better strength property. The tensile strength of starch film was increased from 2.44 MPa(Nature-StF) to 7.32 MPa(CNF/Pul-StF), with a 200% increase. The results of the light/water vapor transmittance test indicate that the starch film treated with the CNF/Pul system had better optical transmittance and a certain enhancement effect on the water vapor barrier performance. The optical transmittance of starch film treated with CNF/Pul system increased from 49.3%~51.2% (Nature-StF) to 56.1%~60.1% (CNF/Pul-StF), and water vapor transmission index, decreased from 9.26×10-12 g·cm/(Pa·s·cm2) (Nature-StF) to 6.33×10-12 g·cm/(Pa·s·cm2) (CNF/Pul-StF). |
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