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- Title
Simultaneously enhancing microelastic response and degradability for poly(butylene succinate) composite monofilaments by silanized microcrystalline cellulose.
- Authors
Zhang, Yang; Liao, He; Zhang, Yue; Zhang, Yumei
- Abstract
With the increasing demand for environmentally friendly and sustainable materials, research on cellulose/bio-based polyester composites has received increasing attention. However, the hydrophilicity of cellulose remains a major factor in its poor interaction with hydrophobic bio-based polyester. To prepare microcrystalline cellulose (MCC)/poly(butylene succinate) (PBS) composite monofilaments with high cellulose content to suppress the deformation of PBS, hexadecyltrimethoxysilane (KH1631) was selected for surface silylation of MCC at a mass ratio of 1:0.5 based on the principle of polarity similarity. The physical–chemical double crosslinking of KH1631 with MCC enhanced the interfacial bonding between MCC and PBS, so composite monofilaments with modified MCC (named mMCC) contents up to 35 wt% were prepared by melt spinning. After thermal stretching, mMCC/PBS composite monofilaments exhibited uniformly distributed microporous structure and double yield behaviors. Despite the continuous decrease in breaking strength (from 210 to 84 MPa) and elastic modulus (from 1380 to 590 MPa) due to the addition of mMCC, the yield strength (116 MPa) of the mMCC/PBS composite monofilaments was consistent with that of PBS when the mMCC addition reached 25 wt%, indicating no impact on usage intensity. Moreover, mMCC/PBS composite monofilaments showed excellent tensile elasticity (up to 95%), excellent fatigue resistance, and low residual strains under small deformation (15%). Notably, the addition of 15–35 wt% mMCC increased the degradability of composite monofilaments, the degradation rate following 100 days of treatment in an aqueous environment ranged from 3.8%(PBS) to 4.7% (P-mM25), and the degradation rate following 180 days of burial in soil ranged from 3.9%(PBS) to 12.3% (P-mM35). Overall, our work significantly enhanced the compatibility between MCC and PBS without the use of any high-cost modifiers or complex processing methods, and successfully developed mMCC/PBS composite monofilaments that exhibit excellent dimensional stability during use and quick degradation after disposal.
- Subjects
POLYBUTENES; CELLULOSE; FATIGUE limit; BUTENE; MELT spinning; INTERFACIAL bonding
- Publication
Cellulose, 2024, Vol 31, Issue 9, p5591
- ISSN
0969-0239
- Publication type
Article
- DOI
10.1007/s10570-024-05940-7