关键词: 酯化, 纳米材料, 复合材料, 淀粉基材料, 淀粉改性, 疏水改性

Abstract:

Starch is a potential substitute for petroleum-based plastics, but its poor water resistance severely limits the wide application of starch-based packaging materials. In this paper, the characteristics of single modification and composite modification of starch are analyzed in detail, and the research on the preparation of starch-based hydrophobic packaging materials by the combination of starch and hydrophobic materials is introduced. The analysis shows that the research focus of starch hydrophobic modification is to increase the degree of substitution, reduce the production costs and use non-toxic and harmless green solvents. Synergistic modification has become a research hotspot. The key to improve the blending effect is to solve the interface problem of incompatibility between hydrophilic starch and hydrophobic materials. The common methods include modifying starch and hydrophobic materials or adding compatibilizer. However, the cost of synthesizing degradable polyester is relatively high. Looking for low-cost biomass materials to improve the hydrophobicity of starch-based packaging materials has great potential. In a word, this paper proposes that low cost, excellent performance, safety and environmental protection are the main research directions for the development of starch-based hydrophobic packaging materials in the future, which has a certain reference value for the preparation of starch-based hydrophobic packaging materials.

Key words: esterification, nanomaterials, composite materials, starch-based materials, starch modification, hydrophobic modification