Ultralight, hydrophobic, monolithic konjac glucomannan-silica composite aerogel with thermal insulation and mechanical properties

Zhu, Jingjing; Hu, Jun; Jiang, Chongwen; Liu, Siyuan; Li, Ying

doi:10.1016/j.carbpol.2018.11.073

Cited by 69 publications

(31 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2e and Movie S2). Moreover, the water contact angle achieved by the PVDF/PI aerogel is much higher than other hydrophobic materials including PAN/carbon nanotube/Fe 3 O 4 aerogel [6], nanocellulose aerogel [38], silica aerogel [39], konjac glucomannan-silica aerogel [40], clay/PVA aerogel [41], PVA/cellulose nanofibril aerogel [42] and hydroxyapatite nanowire aerogel [43] (Fig. S7).…”

Section: Resultsmentioning

confidence: 98%

Superhydrophobic polyvinylidene fluoride/polyimide nanofiber composite aerogels for thermal insulation under extremely humid and hot environment

et al. 2020

View full text Add to dashboard Cite

Excellent thermal insulating materials are highly demanded in various applications including buildings, aerospace and sport equipment. However, in practical applications, the performance of thermal insulating materials usually deteriorates under diverse temperature and humidity conditions. Therefore, it is highly essential to construct a bulk material that exhibits outstanding thermal insulation performance under extremely humid and hot environment. In this work, we have conceived a green and effective strategy to fabricate a superhydrophobic and compressible polyvinylidene fluoride/ polyimide (PVDF/PI) nanofiber composite aerogel via electrospinning and freeze-drying technique. Interestingly, the PVDF nanofibers and PI nanofibers function as the hydrophobic fibrous framework and mechanical support skeleton, respectively, forming a robust three-dimensional framework with good mechanical flexibility. The PVDF/PI aerogel possesses outstanding superhydrophobic feature (water contact angle of 152°) and low thermal conductivity (31.0 mW m −1 K −1) at room temperature. Significantly, even at 100% relative humidity (80°C), the PVDF/PI aerogel still exhibits a low thermal conductivity of only 48.6 mW m −1 K −1 , which outperforms the majority of commercial thermal insulating materials. Therefore, the novel PVDF/PI aerogel is promising as an excellent thermal insulating material for the applications in high-temperature and humid environment.

show abstract

Section: Resultsmentioning

confidence: 98%

Superhydrophobic polyvinylidene fluoride/polyimide nanofiber composite aerogels for thermal insulation under extremely humid and hot environment

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Regarding thermal-insulated biomaterials, glucomannan materials obtained by supercritical drying have not been reported in the literature, but cryogels obtained by freeze-drying have been widely investigated [94,95]. Incorporation of silica or starch/wheat straw into konjac glucomannan could positively influence the hydrophobicity, mechanical strength, and the thermal insulation property of final biomaterial, which are key parameters in insulated food packaging, i.e., packaging of temperature-sensitive food [96,97]. On the other hand, Lethonen et al investigated galactoglucomannan/anionic cellulose nanofibrils aerogels that contained food-grade sunflower oil for in situ production and release of hexanal, to prolong the shelf life of blueberries and cherry tomatoes [98].…”

Section: Glucomannansmentioning

confidence: 99%

Prospect of Polysaccharide-Based Materials as Advanced Food Packaging

Nešić

Cabrera‐Barjas

Dimitrijević-Branković

et al. 2019

Molecules

228

View full text Add to dashboard Cite

The use of polysaccharide-based materials presents an eco-friendly technological solution, by reducing dependence on fossil resources while reducing a product's carbon footprint, when compared to conventional plastic packaging materials. This review discusses the potential of polysaccharides as a raw material to produce multifunctional materials for food packaging applications. The covered areas include the recent innovations and properties of the polysaccharide-based materials. Emphasis is given to hemicelluloses, marine polysaccharides, and bacterial exopolysaccharides and their potential application in the latest trends of food packaging materials, including edible coatings, intelligent films, and thermo-insulated aerogel packaging.

show abstract

“…It has abundant free carboxyl and hydroxyl groups in the skeleton unit, contributing to excellent ability to attract the multivalent cations and form desirable cross-linking structure. It has a high viscous property (30,000 mPa s, 1%, w/ v), and molecular weight (6.8×10 5 -9×10 6 Da) (Crosby, 2002;, making it easier to be considered as a framework material in aerogels (Zhu, Hu, Jiang, Liu, & Li, 2019). In our previous studies , KGM molecular chain as a skeleton can be composited with gelatin and starch, which could promote the formation of open and close pores, respectively.…”

Section: Carboxymethylationmentioning

confidence: 99%

The advances of polysaccharide-based aerogels: Preparation and potential application

Wang

et al. 2019

Carbohydrate Polymers

151

View full text Add to dashboard Cite

Highlights 1. Polysaccharide-based aerogels can be prepared with supercritical or freeze drying. 2. Polysaccharide-based aerogels may have nm-μm pore size distribution. 3. Aerogels with open or close pores have different functions and applications. 4. The formula and drying methods can change the pore structure and functions. 5. Advances and future challenges of polysaccharide-based aerogels are clarified. Highlights (for review)

show abstract

Ultralight, hydrophobic, monolithic konjac glucomannan-silica composite aerogel with thermal insulation and mechanical properties

Cited by 69 publications

References 59 publications

Superhydrophobic polyvinylidene fluoride/polyimide nanofiber composite aerogels for thermal insulation under extremely humid and hot environment

Superhydrophobic polyvinylidene fluoride/polyimide nanofiber composite aerogels for thermal insulation under extremely humid and hot environment

Prospect of Polysaccharide-Based Materials as Advanced Food Packaging

The advances of polysaccharide-based aerogels: Preparation and potential application

Contact Info

Product

Resources

About