选用辛基三甲氧基硅烷(OTMS),通过一步法制备了改性超细高岭土(FK)。以淀粉-壳聚糖(SCS)为基体,使用溶液插层法制备了超细高岭土-淀粉-壳聚糖复合薄膜(SCSFK)。经红外光谱仪和X射线衍射仪探究了偶联剂改性机理,高清扫描电镜结果表明填料与基体界面明显改善,热分析结果表明FK对复合材料热稳定性提升效果最佳,热机械分析检测SCSFK的玻璃转化温度(Tg)较SCS降低了77℃,拉伸实验表明SCSFK拉伸强度较SCS提升了330%,断裂伸长率提升了200%,耐水性实验表明SCSFK疏水性明显增强。
Octyltrimethoxysilane (OTMS) was used to modify superfine kaolin (K,FK) by a one-step method.Herein,starch-chitosan was treated as matrix while superfine kaolin-starch-chitosan composite films (SCSK,SCSFK) were prepared by solution intercalation method.The modification mechanism were explored by results of FT-IR and XRD.FESEM images showed that the interface between filler and matrix was improved obviously.The results of thermal analysis attested that FK had the best effect on enhancing the thermal stability of composites.The glass transition temperature (Tg) of SCSFK was decreased by 77℃ compared with SCS by results of DMA.The tensile strength and elongation of SCSFK were improved by 330% and 200% than that of SCS respectively.The hydrophobicity of SCSFK was enhanced.
[1] Flores-Hernández C,Colín-Cruz A,Velasco-Santos C,et al.All green composites from fully renewable biopolymers:chitosan-starch reinforced with keratin from feathers[J].Polymers,2014,6(5):686-705.
[2] Mendes J F,Paschoalin R T,Carmona V B,et al.Biodegradable polymer blends based on corn starch and thermoplastic chitosan processed by extrusion[J].Carbohydrate Polymers,2016,137:452-458.
[3] Yusof Y M,Shukur M F,Illias H A,et al.Conductivity and electrical properties of corn starch-chitosan blend biopolymer electrolyte incorporated with ammonium iodide[J].Physica Scripta,2014,89(3):35-37.
[4] Clasen S H,Muller C M O,Parize A L,et al.Synthesis and characterization of cassava starch with maleic acid derivatives by etherification reaction[J].Carbohydrate Polymers,2018,180:348.
[5] Mende M,Schwarz D,Steinbach C,et al.Simultaneous adsorption of heavy metal ions and anions from aqueous solutions on chitosan-investigated by spectrophotometry and SEM-EDX analysis[J].Colloids and Surface A,2016,510(5):275-282.
[6] Kaewtatip K,Tanrattanakul V,Phetrat W.Preparation and characterization of kaolin/starch foam[J].Applied Clay Science,2013,80-81:413-416.
[7] Díaz M,Villa-García M A,Duarte-Silva R,et al.Preparation of organo-modified kaolinite sorbents:the effect of surface functionalization on protein adsorption performance[J].Colloids and Surfaces A,2017,530(5):181-190.
[8] Ferreira B F,Ciuffi K J,Nassar E J,et al.Kaolinite-polymer compounds by grafting of 2-hydroxyethyl methacrylate and 3-(trimethoxysilyl)propyl methacrylate[J].Applied Clay Science,2017,146(15):526-534.
[9] Douglas M,Helen P,Ineke T,et al.Novel polymer clay-based nanocomposites:films with remarkable optical and water vapor barrier properties[J].Macromolecular Materials and Engineering,2016,301(7):836-845.
[10] Cyras V P,Manfredi L B,Ton-That M T,et al.Physical and mechanical properties of thermoplastic starch/montmorillonite nanocomposite films[J].Carbohydrate Polymers,2008,73(1):55-63.
[11] Taubert A,Palivan C,Casse O,et al.Ionic liquid-crystal precursors (ILCPs) for CuCl platelets:the origin of the exothermic peak in the DSC curves[J].Journal of Physical Chemistry C,2007,111(11):4077-4082.
[12] Ayana B,Supratim S,Khatua B B.Highly exfoliated eco-friendly thermoplastic starch(TPS)/poly (lactic acid)(PLA)/clay nanocomposites using unmodified nanoclay[J].Carbohydrate Polymers,2014,110(38):430-439.
[13] Aimé-Mbey J,Hoppe S.Thomas F.Cassava starch-kaolinite composite films.thermal and mechanical properties related to filler-matrix interactions[J].Polymer Composites,2015,36(1):184-191.
[14] Homer S,Kelly M,Day L.Determination of the thermo-mechanical properties in starch and starch/gluten systems at low moisture content-a comparison of DSC and TMA[J].Carbohydrate Polymers,2014,108(1):1-9.
[15] Jin Z,Pramoda K P,Guo X,et al.Dynamic mechanical behavior of melt-walled carbon nanotube/poly(methyl methacrylate) composites[J].Chemical Physics Letters,2001,337(1-3):43-47.
[16] Samyn P.Wetting and hydrophobic modification of cellulose surfaces for paper applications[J].Journal of Materials Science,2013,48(19):6455-6498.
[17] Gao W,Dong H,Hou H,et al.Effects of clays with various hydrophilicities on properties of starch-clay nanocomposites by film blowing[J].Carbohydrate Polymers,2012,88(1):321-328.
基金资助
国家自然科学基金(51164026);内蒙古科技大学创新基金(2016qdl-B20)
PDF
(4499KB)
