Page 228 - 《水产学报》2025年第12期

邱昱，等 水产学报, 2025, 49(12): 129717

Artificial seawater degradation performance of poly (adipic acid)/butylene
terephthalate/starch composite monofilament

1,2
2*
4
3
1,2
QIU Yu , SHI Jiangao , YU Wenwen , XU Junjie , XIE Chenglan ,
2,5
WANG Meng , ZHANG Jian 1*
1. College of Marine Living Resource Sciences and Management, Shanghai Ocean University, Shanghai 201306, China;
2. East China Sea Fisheries Research Institute, China Academy of Fishery Sciences, Shanghai 200090, China;
3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
4. China National Fisheries Corp., Beijing 100160, China;
5. School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China

Abstract: In order to reduce the "ghost fishing" and "white pollution" caused by lost fishing gear, the degradable fishing gear
materials has become one of the effective ways to achieve sustainable development of China's fishery. In this study, poly(adipic
acid) butylene terephthalate (PBAT) monofilament and PBAT/starch composite monofilament were prepared by melt spinning,
and the thermodynamics, mechanical properties, weight loss rate, infrared spectrum and microstructure changes of PBAT fiber
and PBAT/starch composite monofilament that were degraded for 5 months under different artificial seawater degradation
environments were compared and analyzed, and the effects of temperature and pH on the seawater degradation performance of
the two monofilaments were studied. The results showed that the inclusion of starch shifts the melting temperature (T m ) of the
PBAT composite monofilament towards a lower temperature, and broadens the crystal melting peak. In terms of mechanical
properties, the breaking strength of monofilament decreased to a certain extent, but the nodule strength retention rate increased
from 63.86% to 97.56%, In the initial stage, the infrared spectral absorption peaks of the two monofilament samples largely
align with the characteristic peaks of pure PBAT and pure starch. The addition of starch improved the monofilament's degrada-
tion performance obviously, with an average weight loss rate increase of 4.92% because the surface erosion of the monofila-
ment intensified, and the holes and cracks deepened; Analyzing from an environmental perspective, the degradation rate of the
monofilaments accelerates with rising temperature and increasing pH in the degradation environment. In this experiment, the
seawater degradation performance of starch-based PBAT composite monofilaments was systematically studied, which can
provide a reference for the development and application of new degradation fishing gear materials.
Key words: fishing gear materials; poly(adipic acid)/butylene terephthalate, PBAT; starch; seawater degradation; linear fitting
of weight loss rate; microscopic morphology
Corresponding authors: SHI Jiangao. E-mail: jiangaoshi666@163.com;
ZHANG Jian. E-mail: j-zhang@shou.edu.cn

Funding projects: National Natural Science Foundation of China (31972844, 31872611)

中国水产学会主办 sponsored by China Society of Fisheries https://www.china-fishery.cn
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