Starch/chitosan films reinforced with polydopamine modified MMT: Effects of dopamine concentration

Zhou, Min; Liu, Qin; Wu, Shuaishuai; Gou, Zhenqiong; Wu, Xuezhong; Xu, Didi

doi:10.1016/j.foodhyd.2016.06.030

Cited by 65 publications

(23 citation statements)

References 25 publications

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“…TGA was used to estimate the intercalation extent of the Mt by ε-PL, as well as the thermal stability of the Mt, ε-PL and PL-Mt [37]. As illustrated in Figure 3, the Mt exhibited excellent thermal stability, with a residue as high as 90.78% at 800 • C, and a pronounced mass loss from ambient to 100 • C owing to the evaporation of absorbed water.…”

Section: Tga Of Pl-mtmentioning

confidence: 99%

Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

Yuan

Zhang

et al. 2019

Materials

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In this study, two types of antibacterial montmorillonites (Mt) were prepared using a facile method. The Mt modified with ε-polylysine hydrochloride (ε-PL) was named PL-Mt, while the Mt dually modified with dioctadecyl dimethylammonium chloride (D1821) and ε-PL was named PL-OMt. The results of the X-ray diffraction, Fourier-transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA) of the PL-Mt indicated that 30% ε-PL was the most suitable amount for intercalating the Mt. The particle size and distribution of the ε-PL in the solution demonstrated that the Mt d-value could not be further increased owing to the increasing ε-PL diameter. The result of the X-ray diffraction of PL-OMt displayed that ultrasonic treatment at 600 W facilitated ε-PL to intercalate into the OMt interlayer space. The PL-OMt prepared with ultrasonic treatment at 600 W exhibited antibacterial activity against Escherichia coli and Bacillus subtilis superior to that of the PL-OMt prepared with higher-power ultrasonic treatment. Thus, the addition of 30% ε-PL based on the dry Mt mass is the most suitable ratio for preparing PL-Mt, while ultrasonic treatment at 600 W is the most suitable for preparing PL-OMt. These findings may expand the application fields of ε-PL.

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Section: Tga Of Pl-mtmentioning

confidence: 99%

Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

Yuan

Zhang

et al. 2019

Materials

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“…In this research, PDA as a synthetic analogue of the naturally occurring melanin was prepared through dopamine autopolymerization and it is biocompatible and environmentally friendly . The incorporation of PDA remarkably improved compatibility and adhesion between nano SiO 2 and PP matrix which is mainly responsible for excellent mechanical properties . The incorporation of modified SiO 2 nano‐particle SiO 2 @polydopamine also tremendously improved hydrophilicity of PP matrix that may contribute to dyeing of PP product .…”

Section: Introductionmentioning

confidence: 99%

“…which is mainly responsible for excellent mechanical properties. 21 The incorporation of modified SiO 2 nano-particle SiO 2 @ polydopamine also tremendously improved hydrophilicity of PP matrix that may contribute to dyeing of PP product. [22][23][24][25] When 1% wt SiO 2 @polydopamine and a certain amount of b nucleating agent was added, the impact strength of composite reached the maximum value 12.60 k J/m 2 (improving 127% compared to pure PP), the bending strength reached 41.85 MPa, the bending modulus was 2192 MPa, the composite possessed hydrophilic performance with the water contact angle of 88.328.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous enhancements of mechanical properties and hydrophilic properties of polypropylene via nano‐silicon dioxide modified by polydopamine

Qiu

Wang

Yang

et al. 2017

J of Applied Polymer Sci

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This study is focused on the development of high‐performance composite materials based on nano silicon dioxide (nano‐SiO2) modified by polydopamine (PDA). A facile one‐step method was developed to synthesize core–shell structured SiO2@polydopamine (PDA) nanospheres. During the synthesis, a PDA shell was simultaneously coated on the SiO2 nanospheres to form the core–shell nanostructure which was blended with polypropylene (PP) and β nucleating agent (β‐NA) to enhance both mechanical and hydrophilic properties. Nano‐SiO2 particles modified by PDA (SiO2@polydopamine) influence the crystallization of PP seriously. The results indicated that when 1%wt SiO2@polydopamine was added, the impact strength of composite reached the maximum value 12.60k J/m2 increasing 137% compared with PP, the bending strength and bending modulus decreased slightly reaching 41.85 MPa, and 2192 MPa, respectively, the composite possessed hydrophilic performance with the water contact angle of 88.32°. β nucleating agent was used in all formulations, the synergistic effect toward mechanical properties with SiO2@polydopamine was studied. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45004.

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“…With an increase in the SL concentration, the weight loss of the TiO 2 ‐SLx samples increased, especially for TiO 2 ‐SL25. Therefore, the addition of SL decreased the thermal stability of TiO 2 ‐SLx (Zhou et al., ).…”

Section: Resultsmentioning

confidence: 99%

Acetylated Distarch Phosphate/Chitosan Films Reinforced with Sodium Laurate‐Modified Nano‐TiO₂: Effects of Sodium Laurate Concentration

Song

et al. 2018

Journal of Food Science

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Nano‐titanium dioxide (TiO2) was modified with the surfactant sodium laurate (SL) via ultrasonic microwave‐assisted technology to improve the dispersion of TiO2 in polymer matrices. As revealed by Fourier transform infrared spectroscopy, X‐ray diffraction, and scanning electron microscopy analyses, SL was well adsorbed onto the TiO2 surface through chemical bonding, resulting in SL‐modified TiO2 (TiO2‐SLx). The hydrophobicity and dispersibility of TiO2‐SLx increased significantly compared to unmodified nano‐TiO2. With an increase in the SL concentration from 5% to 15%, the agglomeration of TiO2‐SLx particles decreased considerably, while the particles were more uniform. TiO2‐SLx nanoparticles (3 wt%) were then incorporated into acetylated distarch phosphate/chitosan (ADPS/CS) blended matrices to reinforce the biopolymers. Relative to unmodified TiO2, TiO2‐SLx exhibited a better dispersion capability. Furthermore, as the SL concentration increased, the tensile strength (TS) of the composite films increased, while the elongation at break (E), water vapor permeability (WVP), and solubility all decreased. The composite film containing TiO2‐SL15 (TiO2 modified with 15% SL; ADPS/CS‐TiO2‐SL15 film) displayed the highest TS (31.50 MPa), which was 33.70% higher than that of the pure ADPS/CS film, whereas the ADPS/CS‐TiO2‐SL25 film exhibited the lowest E. Further, the ADPS/CS‐TiO2‐SL15 film displayed the lowest WVP (0.90 × 10−12 g·cm−1·s−1·Pa−1) and solubility (22.91%), which decreased by 30.23% and 26.03% compared to that of the pure ADPS/CS film, respectively. Therefore, SL modification and the use of ultrasonic microwave‐assisted technology are promising for the preparation of nanofillers for biopolymer reinforcement. Practical Application Nano‐titanium dioxide (TiO2) nanoparticles were modified using the anionic surfactant sodium laurate via ultrasonic‐microwave assisted technology, to improve the dispersion of the TiO2 nanoparticles in polymer matrices. Modified TiO2 nanoparticles were incorporated into acetylated di‐starch phosphate/Chitosan blend films, causing the tensile strength of the composite film to increase and the water solubility and water vapor permeability of the composite film to decrease, making the films suitable for packaging applications.

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Starch/chitosan films reinforced with polydopamine modified MMT: Effects of dopamine concentration

Cited by 65 publications

References 25 publications

Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

Simultaneous enhancements of mechanical properties and hydrophilic properties of polypropylene via nano‐silicon dioxide modified by polydopamine

Acetylated Distarch Phosphate/Chitosan Films Reinforced with Sodium Laurate‐Modified Nano‐TiO₂: Effects of Sodium Laurate Concentration

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Starch/chitosan films reinforced with polydopamine modified MMT: Effects of dopamine concentration

Cited by 65 publications

References 25 publications

Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

Simultaneous enhancements of mechanical properties and hydrophilic properties of polypropylene via nano‐silicon dioxide modified by polydopamine

Acetylated Distarch Phosphate/Chitosan Films Reinforced with Sodium Laurate‐Modified Nano‐TiO2: Effects of Sodium Laurate Concentration

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Acetylated Distarch Phosphate/Chitosan Films Reinforced with Sodium Laurate‐Modified Nano‐TiO₂: Effects of Sodium Laurate Concentration