Park Subong, Bae Bongseong, Cha Bong-Jin, Kim Yun Jin, Kwak Hyo Won
Division of Marine Production System Management, Pukyong National University, Busan 48513, Republic of Korea.
Fisheries Engineering Research Division, National Institute of Fisheries Science, Busan 46083, Republic of Korea.
Mar Pollut Bull. 2023 Sep;194(Pt B):115295. doi: 10.1016/j.marpolbul.2023.115295. Epub 2023 Jul 28.
Nylon fishing nets have excellent strength and durability, but when lost at sea, their insufficient decomposition destroys habitats and spawning grounds, and pollutes the marine environment. This led to the development of poly(butylene succinate) (PBS) resin for biodegradable fishing gear based on aliphatic fibers. Prompted by the low stiffness and elastic recovery of PBS, we introduced two additional components into the molecular structure of PBS: adipic acid and ethylene glycol. These two new components were combined with succinic acid and 1,4-butanediol, the existing components of PBS, to synthesize poly(butylene adipate-co-butylene succinate-co-ethylene adipate-co-ethylene succinate) (PBEAS) resin via esterification and polycondensation reactions of a quaternary aliphatic copolyester. Although the molecular weight and molecular weight distribution of PBEAS are similar to those of PBS, it has excellent tensile strength, stiffness, elastic recovery, and biodegradability, with a low melting point for good production efficiency. These improvements are expected to allow PBEAS resin to be applied to gill nets for fish that require high stiffness, thereby expanding the use of biodegradable fishing gear.
尼龙渔网具有出色的强度和耐用性，但当它们在海上丢失时，由于其分解不充分，会破坏栖息地和产卵场，并污染海洋环境。这促使人们开发基于脂肪族纤维的聚丁二酸丁二醇酯（PBS）树脂用于可生物降解的渔具。由于PBS的刚度和弹性回复率较低，我们在PBS的分子结构中引入了另外两种成分：己二酸和乙二醇。这两种新成分与PBS的现有成分琥珀酸和1,4-丁二醇相结合，通过季戊四醇酯的酯化和缩聚反应合成了聚（丁二酸丁二醇酯-共-丁二酸己二醇酯-共-乙二酸丁二醇酯-共-乙二酸己二醇酯）（PBEAS）树脂。尽管PBEAS的分子量和分子量分布与PBS相似，但它具有出色的拉伸强度、刚度、弹性回复率和生物降解性，且熔点较低，生产效率高。这些改进有望使PBEAS树脂应用于对刚度要求较高的鱼类刺网，从而扩大可生物降解渔具的使用范围。
