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Simultaneously enhancing microelastic response and degradability for poly(butylene succinate) composite monofilaments by silanized microcrystalline cellulose

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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.

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Acknowledgments

This work was supported by the Shanghai Synchrotron Radiation Facility (SSRF).

Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Yang Zhang: Methodology, Investigation, Writing—original draft, Writing—review & editing. He Liao: Investigation. Yue Zhang: Writing—review & editing. Yumei Zhang: Conceptualization, Writing—review & editing, Resources, Supervision.

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Correspondence to Yue Zhang or Yumei Zhang.

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The manuscript has not been submitted to multiple publications for simultaneous consideration. The submitted work is original and has not been published elsewhere in any form or language (in part or in whole). No potential conflicts of interest existed between researchers, and informed consent was obtained from all individual participants included in the study.

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Zhang, Y., Liao, H., Zhang, Y. et al. Simultaneously enhancing microelastic response and degradability for poly(butylene succinate) composite monofilaments by silanized microcrystalline cellulose. Cellulose (2024). https://doi.org/10.1007/s10570-024-05940-7

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  • DOI: https://doi.org/10.1007/s10570-024-05940-7

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