Study on performance of ramie fiber⁃reinforced polybutylene succinate through treatment with citric acid

doi:10.19491/j.issn.1001-9278.2024.12.009

Abstract

Abstract:

In this study， citric acid （CA） was used to modify ramie fiber （RF）， and then the polybutadiene succinate （PBS）/modified RF bio⁃composites were prepared. Changes in the thermal stability， crystallinity， and morphology of CA⁃modified RF were investigated. The mechanism for the interface interaction between the CA⁃modified RF and PBS was analyzed. The optimal content of CA⁃modified RF for the bio⁃composites was determined to be 8 wt% according to their tensile properties. The bio⁃composites obtained tensile strength and modulus of 44.1 and 563.3 MPa， respectively. Meanwhile， the mechanical properties were compared between the PBS/CA⁃modified RF bio⁃composites and the corresponding bio⁃composites with the acetic acid （AA）⁃ and sodium hydroxide （SH）⁃modified RF. The results indicated that PBS/AA⁃ and SH⁃modified RF bio⁃composites presented tensile strength of 40.2 MPa and 41.0 MPa， respectively， both of which were lower than those of the PBS/CA⁃modified RF bio⁃composites.

Key words: citric acid, ramie fiber, polybutylene succinate, bio?composite, mechanical property

CLC Number:

TQ323.4

MENG Chenghan, LUO Haowen, LIU Hao, FEI Jilong, YANG Jianfei, YANG Zhen, JIA Liangyuan. Study on performance of ramie fiber⁃reinforced polybutylene succinate through treatment with citric acid[J]. China Plastics, 2024, 38(12): 54-59.

Figures/Tables 8

Fig.1. DTG and XRD curves patterns of untreated and treated RF with CA

Fig.2. SEM of untreated and treated RF with CA

Fig.3. FTIR spectra of untreated and treated RF with CA

Fig.4. Schematic representation of RF reinforcing PBS matrix after the CA treatment

Fig.5. TG curves of CA⁃RF/PBS bio⁃composites with different CA⁃RF contents

CA⁃RF含量/%	0	2	5	8	10	12
T_i/℃	319.18	282.53	278.14	284.56	281.27	279.71
T_m/℃	405.71	399.75	402.53	404.53	401.40	398.78
T_f/℃	500.77	518.81	524.13	536.33	524.94	522.58
RM/%	2.37	5.47	5.76	6.62	6.12	6.20

Tab.1. Temperature for the thermal degradation of CA⁃RF/PBS bio⁃composites with different CA⁃RF contents

Fig.6. The mechanical properties of untreated、CA、SH and AA treated RF/PBS bio⁃composites with different fiber contents

Fig.7. Fracture surface SEM images of untreated and CA treated RF/PBS bio⁃composites with different fiber contents

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