Novel hydrophilic carboxymethyl starch/montmorillonite nanocomposite films

Wilpiszewska, Katarzyna; Antosik, Adrian Krzysztof; Spychaj, Tadeusz

doi:10.1016/j.carbpol.2015.04.023

Cited by 88 publications

(58 citation statements)

References 38 publications

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“…The WCA was observed to gradually decrease with the addition of 10 to 20% vol/vol of the CMS. Carboxymethyl starch consists of bulk hydrophilic groups in the polysaccharide chain, and it is able to absorb water hundred times more than its weight . The O‐H and –COOH hydrophilic groups in their structure would enhance the attraction of water molecule to the nanofibers.…”

Section: Resultsmentioning

confidence: 99%

Electrospinning of carboxymethyl starch/poly(L‐lactide acid) composite nanofiber

Yusof

Shamsudin

Abdullah

et al. 2018

Polymers for Advanced Techs

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Carboxymethyl starch (CMS) is a natural polymer derived from sago starch that is obtained from sago palm (Metroxylon spp.). Herein, CMS was used as a polysaccharide source in preparations of composite nanofibers with poly(L‐lactide acid) (PLLA). The incorporation of CMS with PLLA in nanofiber form has great potential to be used in biomedical applications. The composite PLLA/CMS nanofibers were fabricated by electrospinning technique at various ratios of CMS, which were 5, 10, 15, and 20% vol/vol. The composite nanofibers were characterized according to their physical morphology, chemical interaction, wettability, water uptake, and thermal and mechanical behaviors. The result showed that uniform and bead‐free nanofibers were produced at the low ratio of CMS while fractal and discontinuing fiber was observed at a high ratio of CMS. A better mechanical strength was obtained at low CMS ratio as compared with higher one. Fourier transform infrared results showed that there was an interaction between CMS and PLLA after electrospinning. The surface hydrophilicity and water uptake increased with increasing ratio of CMS. The results from the differential scanning calorimeter analysis showed the decrease of the glass transition (Tg) and cold crystallization temperature (Tcc) of the nanofiber after addition of CMS in PLLA.

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Section: Resultsmentioning

confidence: 99%

Electrospinning of carboxymethyl starch/poly(L‐lactide acid) composite nanofiber

Yusof

Shamsudin

Abdullah

et al. 2018

Polymers for Advanced Techs

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“…The reaction scheme between CMSS and citric acid is shown in Scheme . The cross‐linking between CMSS and citric acid can be seen through chemical linkages leading to the formation of ester bonds . As far as this study is concerned, no study has been done in preparing CMSS hydrogel using citric acid as cross‐linker.…”

Section: Introductionmentioning

confidence: 99%

Citric Acid Cross‐Linking of Carboxymethyl Sago Starch Based Hydrogel for Controlled Release Application

Nordin

Rahman

Talip

et al. 2018

Macromolecular Symposia

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Carboxymethyl sago starch (CMSS) is prepared using carboxymethylation reaction. The reaction times are varied to determine the optimum degree of substitution (DS) and reaction efficiency (RE). The CMSS prepared via carboxymethylation for 3 h shows the highest DS and RE. The CMSS hydrogel is prepared using citric acid as a cross‐linker. The effects of the preparation condition of citric acid/CMSS hydrogel such as the percentage of citric acid (w/w), cross‐linking periods, and cross‐linking temperature on the gel fraction are investigated. The optimization of preparation conditions of hydrogels using cross‐linker demonstrated 25% higher gel fraction compared to previously reported sago starch hydrogels prepared via irradiation cross‐linking. The swelling study is carried out in distilled water (pH 6.5), acidic (pH 1.2), neutral (pH 7.4), and alkaline (pH 11) media. The release behavior of methylene blue (MB) as the drug model suggests the potential of CMSS hydrogel to be used in drug delivery applications.

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“…Nano‐SiO 2 has been reported to enhance the tensile strength (TS) and water resistance of soy protein isolate films (Han & Wang, ), while the use of nano‐straw cellulose significantly increased the TS of maize starch phosphate films (Sun, Shao, & Ma, ). In addition, MMT‐Na (Wilpiszewska, Antosik, & Spychaj, ), nano‐TiO 2 (Fei et al., ; Oleyaei, Almasi, Ghanbarzadeh, & Moayedi, ), and nano‐CaCO 3 (Sun, Xi, Li, & Xiong, ) are reported to have similar effects on polymer films.…”

Section: Introductionmentioning

confidence: 96%

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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Novel hydrophilic carboxymethyl starch/montmorillonite nanocomposite films

Cited by 88 publications

References 38 publications

Electrospinning of carboxymethyl starch/poly(L‐lactide acid) composite nanofiber

Electrospinning of carboxymethyl starch/poly(L‐lactide acid) composite nanofiber

Citric Acid Cross‐Linking of Carboxymethyl Sago Starch Based Hydrogel for Controlled Release Application

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

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Novel hydrophilic carboxymethyl starch/montmorillonite nanocomposite films

Cited by 88 publications

References 38 publications

Electrospinning of carboxymethyl starch/poly(L‐lactide acid) composite nanofiber

Electrospinning of carboxymethyl starch/poly(L‐lactide acid) composite nanofiber

Citric Acid Cross‐Linking of Carboxymethyl Sago Starch Based Hydrogel for Controlled Release Application

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