苦槠是一种来源丰富的野生淀粉资源，但目前苦槠淀粉结构和消化特性的研究匮乏，严重制约苦槠作为淀粉新资源的开发与利用。弄清淀粉的组成和结构，开展消化特性研究是淀粉新资源开发中亟待解决的关键科学问题。淀粉是一种半结晶聚合物，在不同尺度结构上的非均相性直接影响淀粉的酶解消化特性。从多尺度非均相结构入手研究苦槠淀粉消化特性是苦槠淀粉加工和营养特性预测和评估的基础。本项目针对苦槠淀粉的研究盲点，从淀粉的多尺度非均相结构表征入手，在分析苦槠淀粉的组成、分子结构、链构象、颗粒结构、生长环结构、半结晶层结构和晶体结构的基础上，分别对苦槠原淀粉和凝胶苦槠淀粉的体外消化行为进行研究，探讨苦槠淀粉多尺度非均相结构对其消化行为的影响，填补目前苦槠淀粉基础研究领域的空白，为苦槠产品的研发和品质控制提供理论基础，有力地推动苦槠作为优质功能性食品资源和淀粉新资源的开发利用。

Castanopcis Sclerophylla is an abundant wild resource of starch. The scarcity of research in structure and digestibility of starch from Castanopcis Sclerophylla severely restricts the development and utilization of Castanopcis Sclerophylla as a new resource. The researches about compose，structure and the digestibility of starch are key scientific issues in the development of new starch resource. Starch is semi-crystalline polymer. Its heterogeneous structure in multi-scale direct affects the digestibility of starch. Studying the in vitro digestibility of castanopcis sclerophylla starch based on multi-scale heterogeneous structure is the basis for prediction and evaluation of processing and nutrition properties. In this study, the multi-scale heterogeneous structure of starch from Castanopcis Sclerophylla will be analyzed including compose, molecular structure, chain conformation, granular structure, growth ring, semi-crystalline lamellar structure and crystalline structure. Then in vitro digestibility of raw starch and gelatinized starch will also be researched. This program is aim to study the effect of multi-scale heterogeneous structure on in vitro digestibility of castanopcis sclerophylla starch, which will fill the empty in research of starch from castanopcis sclerophylla, and provide the theoretical basis for product development and quality control of castanopcis sclerophylla starch.