甲壳素晶须增强PBC纳米纤维的制备及性能
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摘要
为了提高脂肪族聚碳酸丁二脂(PBC)纳米纤维的力学性能,首先利用酸解法制得纳米级甲壳素晶须,然后与PBC进行共混复合,通过静电纺丝法制得复合纳米纤维.研究表明,制得的甲壳素晶须长度范围为180~680nm,直径分布范围为15~30nm,平均长径比为14.85.将晶须分散到甲酸中24h后,对其表面形貌的研究发现,在短时间内甲酸并不会改变晶须形貌,这也为下一步试验提供了依据.对将不同含量的晶须添到PBC中制得的复合纳米纤维的基本性能进行研究,结果表明,当晶须质量分数为5.0%时,制得的纳米纤维表面光滑、直径分布均匀,且随着更多晶须的加入,复合纤维的热稳定性及力学性能得到显著提高.
In order to improve mechanical properties of poly(butylene carbonate)(PBC)nano-fibers,Chitin Whiskers(ChW)were made by acid decomposition method in advance and then compound nanofibers were obtained with ChW added into PBC solutions by electrospinning method.The studies showed that,the length and diameter of ChW were in the range of 180-680 nm and 15-30 nm respectively and the average ratio of length to diameter was 14.85.In addition,the morphology of ChW in formic acid(FA)solvent was not changed after 24 hours,so it provided basis for the further experiment.The research of PBC nano-fibers with different contents of ChW can be summarized as follows:the nanofibers with uniform diameter distribution and smooth surface could be prepared when ChW content reached 5.0%;and the thermal stability and mechanical properties were both increased correspondingly with the increasing of ChW contents.
In order to improve mechanical properties of poly(butylene carbonate)(PBC)nano-fibers,Chitin Whiskers(ChW)were made by acid decomposition method in advance and then compound nanofibers were obtained with ChW added into PBC solutions by electrospinning method.The studies showed that,the length and diameter of ChW were in the range of 180-680 nm and 15-30 nm respectively and the average ratio of length to diameter was 14.85.In addition,the morphology of ChW in formic acid(FA)solvent was not changed after 24 hours,so it provided basis for the further experiment.The research of PBC nano-fibers with different contents of ChW can be summarized as follows:the nanofibers with uniform diameter distribution and smooth surface could be prepared when ChW content reached 5.0%;and the thermal stability and mechanical properties were both increased correspondingly with the increasing of ChW contents.
引文
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[13]KASAAI M R.A review of several reported procedures to determine the degree of N-acetylation for chitin and chitosan using infrared spectroscopy[J].Carbohydrate Polymers,2008,71(4):497-508.
[2]NAIR L S,LAURENCIN C T.Biodegradable polymers as biomaterials[J].Progress in Polymer Science,2007,32(8/9):762-798.
[3]PAILLET M,DURFRESNE A.Chitin whisker reinforced thermoplastic nanocomposites[J].Macromolecules,2011,34(19):6527-6530.
[4]ZHANG J B,HU Y S,LI S L,et al.Chitin whiskers:An overview[J].Biomacromolecules,2012,13(1):1-11.
[5]龚安华,孙岳玲.纳米晶须材料的研究概述[J].化学工程师,2008,32(5):41-43.
[6]JI Y,WOLFE P S,RODRIGUEZ I A,et al.Preparation of chitin nanofibril/polycaprolactone nanocomposite from a nonaqueous medium suspension[J].Carbohydrate Polymers,2012,87(3):2313-2319.
[7]JUNKASEM J,RUJIRANIT R,SUPAPHOL P.Fabrication of alpha-chitin whisker-reinforced poly(vinyl alcohol)nanocomposite nanofibres by electro-spinning[J].Nanotechnology,2006,17(17):4519-4528.
[8]WANG C,ESKER A R.Nanocrystalline chitin thin films[J].Carbohydrate Polymers,2014,102(12):151-158.
[9]NAGAHA H,HIGUCHI T,JAYAKU R,et al.XRD studies ofβ-chitin from squid pen with calcium solvent[J].International Journal of Biological Macromolecules,2008,42(4):309-313.
[10]WANG S Q,HUANG J H,XU L.Non-ionic surfactants for enhancing electrospinability and for the preparation of electrospun nanofibers[J].Polymer International,2008,57(9):24-27.
[11]CHANDURE A S,UMARE S S,PANDEY R A.Synthesis and biodegradation studies of 1,3-propanediol based aliphatic poly(ester carbonate)s[J].European Polymer Journal,2008,44(7):2068-2086.
[12]杨建红,杜予民,覃彩芹.红外光谱与核磁共振波谱在甲壳素结构研究中的应用[J].分析科学学报,2003,21(3):282-287.
[13]KASAAI M R.A review of several reported procedures to determine the degree of N-acetylation for chitin and chitosan using infrared spectroscopy[J].Carbohydrate Polymers,2008,71(4):497-508.