聚乙烯醇/纳米纤维素晶体复合膜热学性能

doi:10.11707/j.1001-7488.20111123

林业科学 ›› 2011, Vol. 47 ›› Issue (11): 144-148.doi: 10.11707/j.1001-7488.20111123

聚乙烯醇/纳米纤维素晶体复合膜热学性能

唐丽荣^1,2, 黄彪¹, 戴达松¹, 欧文¹, 李玉华¹, 陈学榕¹

1. 福建农林大学材料工程学院福州 350002;2. 福建农林大学金山学院福州 350002

收稿日期:2010-01-13 修回日期:2010-03-04 出版日期:2011-11-25 发布日期:2011-11-25
通讯作者: 黄彪

The Crystallization Behaviors and Thermal Properties of PVA/NCC Composite Films

Tang Lirong^1,2, Huang Biao¹, Dai Dasong¹, Ou Wen¹, Li Yuhua¹, Chen Xuerong¹

1. College of Material Engineering,Fujian Agriculture and Forestry University Fuzhou 350002;2. Jinshan College, Fujian Agriculture and Forestry University Fuzhou 350002

Received:2010-01-13 Revised:2010-03-04 Online:2011-11-25 Published:2011-11-25

摘要/Abstract

摘要：

以微晶纤维素(MCC)为原料,通过硫酸水解得到纳米纤维素晶体(NCC),再将纳米纤维素晶体与聚乙烯醇复合共混制备聚乙烯醇/纳米纤维素晶体复合膜,研究复合膜的热学性能,同时采用场发射透射电镜(FETEM)、场发射扫描电镜(FE-SEM)、原子力显微镜(AFM)、热重分析(TG)、差示扫描量热仪(DSC)等仪器对纳米纤维素晶体及其复合膜进行表征与分析。结果表明: 所制得的纳米纤维素晶体直径约2~24 nm,50~450 nm长,呈棒状; 由FE-SEM图可观察到纳米纤维素晶体与聚乙烯醇具有良好的界面相互作用,但在较大添加量7%时,NCC出现部分团聚,与基体的相容性下降; 由TG和DSC分析说明NCC与PVA基体可较好相容,形成了热稳定性较好的复合膜,但当NCC添加量较大时,由于团聚使复合膜热稳定性下降。

关键词: 聚乙烯醇, 纳米纤维素晶体, 复合膜, 热学性能

Abstract:

Nanocellulose crystal(NCC)was prepared from microcrystalline cellulose(MCC)by sulfuric acid treatment, and composite films were prepared from polyvinyl alcohol(PVA) as the matrix and NCC as the filler. Their morphology, size and thermal properties were characterized by field emission transmission electron microscopy(FETEM), atomic force microscopy(AFM), field emission gun environment scanning electron microscopes (FEGE-SEM), thermogravimetric analysis(TG)and differential scanning calorimetry(DSC). The results indicated that the diameter of NCC was about 2-24 nm, with the length 50-450 nm. From FE-SEM images, it could be observed that PVA /NCC composite films were created by casting from a water suspension to produce a homogeneous dispersion of NCC in the polymer matrix. But it showed some agglomeration when the filler loading reached to 7%, and the interaction between NCC and PVA decreased. TG and DSC analysis showed excellent interaction between NCC and PVA. The composite films filled with nanocellulose crystal exhibited improved thermal properties as compared to the neat PVA film. On the other hand, the thermal stability of the PVA composite films was decreased with filler loading increased to 7%.

Key words: polyvinyl alcohol, nanocellulose crystal, composite films, thermal properties

中图分类号:

O631

唐丽荣;黄彪;戴达松;欧文;李玉华;陈学榕. 聚乙烯醇/纳米纤维素晶体复合膜热学性能[J]. 林业科学, 2011, 47(11): 144-148.

Tang Lirong;Huang Biao;Dai Dasong;Ou Wen;Li Yuhua;Chen Xuerong. The Crystallization Behaviors and Thermal Properties of PVA/NCC Composite Films[J]. Scientia Silvae Sinicae, 2011, 47(11): 144-148.

[1]	唐丽荣;黄彪;戴达松;欧文;李玉华;陈学榕. 纳米纤维素晶体的制备及表征[J]. 林业科学, 2011, 47(9): 119-122.
[2]	夏赤丹孟亮余汉年张春玲. 三苯基甲烷三异氰酸酯交联聚乙烯醇木材粘合剂的研究[J]. 林业科学, 2003, 39(3): 121-124.

聚乙烯醇/纳米纤维素晶体复合膜热学性能

The Crystallization Behaviors and Thermal Properties of PVA/NCC Composite Films

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