Nanocellulose Stabilized Pickering Emulsion Templating for Thermosetting AESO Nanocomposite Foams
Nanocellulose Stabilized Pickering Emulsion Templating for Thermosetting AESO Nanocomposite Foams
复制标题
用于热固性 AESO 纳米复合泡沫的纳米纤维素稳定皮克林乳液模板
DOI：
10.3390/polym10101111
复制
发表时间：
2018-10-01
期刊：
影响因子：
5
通讯作者：
Wu, Min
中科院分区：
文献类型：
--
作者：
Lu, Peng;Guo, Mengya;Wu, Min
乳液模板法是制备聚合物基泡沫塑料的一种有效方法。本文报道了一种以纳米纤维素稳定的Pickering乳液为模板制备的热固性纳米复合泡沫材料。通过将纤维素纳米晶体（CNC）水悬浮液与由丙烯酸酯化环氧大豆油（AESO）、3-氨丙基三乙氧基硅烷（APTS）和过氧化苯甲酰（BPO）组成的所选油混合物机械混合来获得用作聚合物泡沫生产的模板的Pickering乳液。研究了油水比（1：1 ~ 1：3）和CNCs浓度（1.0- 3.0wt%）对乳液稳定性的影响。根据乳液稳定性指数、液滴尺寸和液滴分布表征乳液。在油水比为1：1、CNCs浓度为2.0wt%的条件下制备的乳液在两周的储存期内表现出良好的稳定性。通过在90 °C下加热Pickering乳液60 min形成纳米复合材料泡沫。扫描电子显微镜（SEM）图像显示，泡沫具有微孔结构，具有从0.3 μ m到380 μm不等的不均匀泡孔尺寸。CNCs稳定的Pickering乳液为制备创新的功能性生物基材料提供了一种通用方法。
Emulsion templating has emerged as an effective approach to prepare polymer-based foams. This study reports a thermosetting nanocomposite foam prepared by nanocellulose stabilized Pickering emulsion templating. The Pickering emulsion used as templates for the polymeric foams production was obtained by mechanically mixing cellulose nanocrystals (CNCs) water suspensions with the selected oil mixtures comprised of acrylated epoxidized soybean oil (AESO), 3-aminopropyltriethoxysilane (APTS), and benzoyl peroxide (BPO). The effects of the oil to water weight ratio (1:1 to 1:3) and the concentration of CNCs (1.0–3.0 wt %) on the stability of the emulsion were studied. Emulsions were characterized according to the emulsion stability index, droplet size, and droplet distribution. The emulsion prepared under the condition of oil to water ratio 1:1 and concentration of CNCs at 2.0 wt % showed good stability during the two-week storage period. Nanocomposite foams were formed by heating the Pickering emulsion at 90 °C for 60 min. Scanning electron microscopy (SEM) images show that the foam has a microporous structure with a non-uniform cell size that varied from 0.3 to 380 μm. The CNCs stabilized Pickering emulsion provides a versatile approach to prepare innovative functional bio-based materials.