Mechanics of photosynthesis assisted polymer strengthening
Mechanics of photosynthesis assisted polymer strengthening
复制标题
DOI：
10.1016/j.jmps.2021.104382
复制
发表时间：
2021-03-04
影响因子：
5.3
通讯作者：
Wang，Qiming
中科院分区：
文献类型：
--
作者：
Yu，Kunhao;Feng，Zhangzhengrong;Wang，Qiming
植物细胞利用光合作用产生葡萄糖，葡萄糖被输送到选定的位置，形成坚硬的多糖(如甲壳素、壳聚糖和纤维素)，从而加强植物的结构。这种光合作用在植物中的强化行为在合成材料系统中很少被模仿。我们在这里提出了一种嵌入提取的植物叶绿体的合成聚合物系统，它允许光合作用辅助增强聚合物基质的机械强度。增强机制依赖于光合作用产生的葡萄糖和聚合物基质中的侧基之间的额外交联反应。我们开发了一个理论框架来模拟聚合物的光合作用辅助增强行为。嵌入叶绿体的葡萄糖生产将首先用一般光合作用理论来模拟，而葡萄糖向聚合物基质的输出将用酶辅助传质理论来模拟。其次，提出了以葡萄糖分子为交联剂的聚合物增强网络模型。研究了光照时间、包埋叶绿体浓度和光照强度对硬度增强的影响。理论结果与光合作用辅助聚合物增强的实验结果一致。
Plant cells utilize photosynthesis to produce glucose that is delivered to selected locations to form stiff polysaccharides (e.g., chitin, chitosan, and cellulose), which strengthen the plant structures. Such a photosynthesis-assisted strengthening behavior in plants has rarely been imitated in synthetic material systems. We here propose a synthetic polymer system embedded with extracted plant chloroplasts, which allow for the photosynthesis-assisted mechanical strengthening of the polymer matrix. The strengthening mechanism relies on an additional crosslinking reaction between the photosynthesis-produced glucose and side groups within the polymer matrix. We develop a theoretical framework to model the photosynthesis-assisted strengthening behaviors of polymers. The glucose production of the embedded chloroplasts will be first modeled with a general photosynthesis theory, and the exportation of glucose to the polymer matrix is modeled with an enzyme-assisted mass transport theory. Next, a polymer strengthening network model with glucose molecules as additional crosslinkers is presented. Effects of the illumination period, the concentration of embedded chloroplasts, and the light intensity on the stiffness strengthening are studied. The theoretical results consistently agree with the experimental results of the photosynthesis-assisted polymer strengthening.