Enhancing interfacial interaction and crystallization in polylactic acid-based biocomposites via synergistic effect of wood fiber and self-assembly nucleating agent

Lv, Chao; Luo, Shupin; Guo, Wenjing; Chang, Liang

doi:10.1016/j.ijbiomac.2023.127265

Cited by 5 publications

(4 citation statements)

References 56 publications

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“…It may attributed to the nucleation site provided by the nucleating agent increased with the addition content, nevertheless, excessive nucleating agent particles (7 wt%) hinder the movement of PE molecular chains, resulting in a decrease in the crystallinity of PE composite. Similar results have proposed that the introduction of particles signi cantly increased the crystallinities, while further increasing the content can result in lower crystallinities of the polymer matrix [24].…”

Section: Crystallization Behavior Of Pe Compositessupporting

confidence: 77%

Application of carbon dioxide capture technology in the process of polyethylene foaming materials

Liu,

Jin,

Yang

et al. 2024

Preprint

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Lightweight and multifunctional polymer foams reveal a promising prospect, in terms of reducing energy consumption, and saving materials and resources. Herein, carbon dioxide (CO2) was captured through three amines, such as ethylenediamine (EDA), 1,3-propylenediamine (PDA) and 1,2-cyclohexanediamine (TRK). CO2 then released under heat, used as a foaming agent in the preparation of polyethylene (PE) foams. Cyclodextrin nanosponge (NS) was used as a heterogeneous nucleating agent and a carrier for complex of captured CO2. Evaluation system was developed to control the conditions of combine process, such as thermal and crystallization properties. Results showed that TRK was the proper CO2 capture candidate, with mass ratio of 1:4 for NS and TRK (NS:TRK-CO2(1:4)), and the release temperature of CO2 was 137 ℃. Foamed PE composite was prepared by molding process with NS:TRK-CO2(1:4). The optimum cell morphology was obtained with 5 wt% NS:TRK-CO2(1:4), the cell diameter was 116 µm, and the cell density was 7.9×104 cell/cm3. The best fabricated microcellular PE/NS:TRK-CO2(1:4) composite presented excellent mechanical, thermal and sound insulating performance. The maximum tensile strength of the PE composite was 25.48 MPa, and the maximum bending strength was 11.27 MPa. The impact strength was 5.77 KJ•m-2, more than 1.5 times higher than pure PE. The thermal conductivity was as low as 0.076 W/m•k, the sound absorption coefficient was 0.737 at 1500 Hz, and the noise reduction coefficient was 0.459.

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Section: Crystallization Behavior Of Pe Compositessupporting

confidence: 77%

Application of carbon dioxide capture technology in the process of polyethylene foaming materials

Liu,

Jin,

Yang

et al. 2024

Preprint

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“…The weak interaction between MCC and PBAT limited the inhibition of chain motion of PBAT . However, 3#OMCC had a strong interaction with PBAT, and led to a 13% increased storage modulus of PBAT due to higher crystallinity, leading to an increase in crystalline regions, which physically cross-links or reinforces the amorphous regions, resulting in an increase in the storage modulus value Figure b presents the loss modulus increase with the addition of MCC or OMCC in the temperature range tested.…”

Section: Resultsmentioning

confidence: 97%

“…39 However, 3#OMCC had a strong interaction with PBAT, and led to a 13% increased storage modulus of PBAT due to higher crystallinity, leading to an increase in crystalline regions, which physically cross-links or reinforces the amorphous regions, resulting in an increase in the storage modulus value. 40 Figure 10b presents the loss modulus increase with the addition of MCC or OMCC in the temperature range tested. Compared to PBAT, an increase in loss modulus of 3#OMCC/PBAT is observed, which could attribute to OMCC improving the interfacial bonding and restricting mobility of PBAT's chains.…”

Section: Mechanical Performancementioning

confidence: 99%

Manipulation of Crystallization Nucleation and Mechanical Properties of PBAT Films by Octadecylamine-Cellulose

Tang,

Wang,

Liu

et al. 2024

ACS Sustainable Chem. Eng.

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PBAT, i.e., poly(butylene adipate-co-terephthalate), has its drawbacks of slower crystallization rate, lower crystallinity degree, and modulus of elasticity features. In this study, OMCC/ PBAT complexes were obtained by blending modifications of microcrystalline cellulose with octadecylamine (OMCC) and PBAT in a melt. OMCC significantly enhances the PBAT crystallization degree as a nucleating agent. The kinetics of nonisothermal crystallization for PBAT composites were investigated, and the activation energy of crystallization was calculated. It showed that OMCC speeds up the rate of crystallization and cuts down on the crystallization time. Calculations of crystallization activation energy showed that the effective barrier of the composites was reduced. Comparing with PBAT, OMCC-PBAT is in more compatibility, modulus of elasticity, and crystallization qualities. Potential mechanisms of nucleation and crystallization reinforcement of PBAT complexes were discussed, which will be beneficial for designing PBAT complexes with microcrystalline cellulose for biopolymers.

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“…33 Lv et al added octamethylenedicarboxylic dibenzoylhydrazide (TMC-300) to the PLA matrix, which formed a dendritic structure after addition, promoting the crystallization of PLA and enhancing the crystallinity and mechanical properties of PLA. 34 5-Dimethylthioisosulfate salt (LAK), a polymeric nucleating agent, provides a viable solution to enhance the thermal properties of PLA. [35][36][37] Generally, melt blending is regarded as a straightforward and cost-effective approach to enhance the crystallization properties of PLA.…”

mentioning

confidence: 99%

Impact of aromatic sulfonate derivative on the crystallization, thermal resistance, and hydrolytic properties of poly(lactic acid)

Wei,

Wang,

Lou

et al. 2024

Polymers for Advanced Techs

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The thermal, crystallization kinetics and hydrolysis properties of poly(lactic acid)‐based blends containing different concentrations of 5‐dimethylthioisosulfate salts (LAK) were systematically investigated and compared with those of poly(lactic acid) (PLA). PLA/LAK blends were prepared by melt blending method‐using LAK as a nucleating agent of PLA. During the isothermal crystallization process, the morphology of PLA crystal in the neat PLA and PLA/LAK blends showed spherical crystals. With an increase in the concentration of LAK, the nucleating density of the PLA spherulites increased and the size of the PLA spherulites decreased. Differential scanning calorimetry indicates that after the addition of LAK, both the crystallinity and crystallization rate of PLA have been enhanced. In situ X‐ray diffraction analysis also shows that the sample exhibits the same crystal structure as neat PLA and continues to strengthen, indicating that LAK enhances the crystallization properties of PLA. Moreover, the crystallinity of PLA increased and crystal size of PLA decreased with the increase in the LAK content. The Vicat softening temperatures of PLA/LAK blends increased, so the heat resistance improved. Through hydrolysis testing under identical conditions, the PLA/LAK blends exhibits better hydrolytic stability.

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Enhancing interfacial interaction and crystallization in polylactic acid-based biocomposites via synergistic effect of wood fiber and self-assembly nucleating agent

Cited by 5 publications

References 56 publications

Application of carbon dioxide capture technology in the process of polyethylene foaming materials

Application of carbon dioxide capture technology in the process of polyethylene foaming materials

Manipulation of Crystallization Nucleation and Mechanical Properties of PBAT Films by Octadecylamine-Cellulose

Impact of aromatic sulfonate derivative on the crystallization, thermal resistance, and hydrolytic properties of poly(lactic acid)

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