Self‐healing carbohydrate polymers were synthesized by Diels‐Alder reaction. Intermediate products and the carbohydrate matrices were characterized by Fourier transform infrared spectroscopy (FT‐IR) and ¹H NMR, while the thermally reversible properties were assessed by FT‐IR and differential scanning calorimetry. The mechanical properties, water absorption, and enzymatic degradation of starch/PVA/modified carbohydrate films were examined, as well as the relationship of the properties to the DA and rDA reactions. These results showed that DA bonds were introduced into the carbohydrate polymers successfully and endow the material with self‐healing thermal recyclability. The mixed films exhibited alternating strong and weak mechanical properties upon cycling through the DA and rDA reactions. Water absorption was limited and the films demonstrated good water resistance. The status of the DA bonds was found not to affect the enzymatic degradation rates of the various carbohydrate films.

中文翻译：

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通过热可逆DA键将自修复碳水化合物作为智能材料的合成，性质和应用

自修复碳水化合物聚合物是通过Diels-Alder反应合成的。中间产物和碳水化合物基质通过傅里叶变换红外光谱（FT‐IR）和¹H NMR，同时通过FT-IR和差示扫描量热法评估了热可逆性。检查了淀粉/ PVA /改性碳水化合物薄膜的机械性能，吸水率和酶促降解，以及性能与DA和rDA反应的关系。这些结果表明，DA键已成功引入到碳水化合物聚合物中，并赋予了材料自愈热循环性。当循环通过DA和rDA反应时，混合膜表现出交替的强和弱机械性能。吸水率受到限制，并且膜表现出良好的耐水性。发现DA键的状态不影响各种碳水化合物膜的酶促降解速率。