Preparation of calcium hexaluminate porous ceramics by novel pectin based gelcasting freeze-drying method

The present study aimed to evaluate the effect of Jerusalem artichoke processing methods and drying methods (freeze drying, sublimation drying, vacuum drying) on the basic physicochemical parameters, profiles and contents of sugars and polyphenolic compounds, and health-promoting properties (antioxidant activity, inhibition of the activities of α-amylase, α-glucosidase, and pancreatic lipase) of the produced purée. A total of 25 polyphenolic compounds belonging to hydroxycinnamic phenolic acids (LC-PDA-MS-QTof) were detected in Jerusalem artichoke purée. Their average content in the raw material was at 820 mg/100 g dm (UPLC-PDA-FL) and was 2.7 times higher than in the cooked material. The chemical composition and the health-promoting value of the purées were affected by the drying method, with the most beneficial values of the evaluated parameters obtained upon freeze drying. Vacuum drying could offer an alternative to freeze drying, as both methods ensured relatively comparable values of the assessed parameters.

Download Full-text

Environmentally Friendly and Multifunctional Shaddock Peel-Based Carbon Aerogel for Thermal-Insulation and Microwave Absorption

Nano-Micro Letters ◽

10.1007/s40820-021-00635-1 ◽

2021 ◽

Vol 13 (1) ◽

Author(s):

Weihua Gu ◽

Jiaqi Sheng ◽

Qianqian Huang ◽

Gehuan Wang ◽

Jiabin Chen ◽

...

Keyword(s):

Microwave Absorption ◽

Thermal Insulation ◽

Freeze Drying ◽

Thermal Infrared ◽

Carbon Aerogel ◽

Carbon Aerogels ◽

List Type ◽

Drying Method ◽

Cross Sectional ◽

Compression Resistance

Highlights The eco-friendly shaddock peel-derived carbon aerogels were prepared by a freeze-drying method. Multiple functions such as thermal insulation, compression resistance and microwave absorption can be integrated into one material-carbon aerogel. Novel computer simulation technology strategy was selected to simulate significant radar cross-sectional reduction values under real far field condition. . Abstract Eco-friendly electromagnetic wave absorbing materials with excellent thermal infrared stealth property, heat-insulating ability and compression resistance are highly attractive in practical applications. Meeting the aforesaid requirements simultaneously is a formidable challenge. Herein, ultra-light carbon aerogels were fabricated via fresh shaddock peel by facile freeze-drying method and calcination process, forming porous network architecture. With the heating platform temperature of 70 °C, the upper surface temperatures of the as-prepared carbon aerogel present a slow upward trend. The color of the sample surface in thermal infrared images is similar to that of the surroundings. With the maximum compressive stress of 2.435 kPa, the carbon aerogels can provide favorable endurance. The shaddock peel-based carbon aerogels possess the minimum reflection loss value (RLmin) of − 29.50 dB in X band. Meanwhile, the effective absorption bandwidth covers 5.80 GHz at a relatively thin thickness of only 1.7 mm. With the detection theta of 0°, the maximum radar cross-sectional (RCS) reduction values of 16.28 dB m2 can be achieved. Theoretical simulations of RCS have aroused extensive interest owing to their ingenious design and time-saving feature. This work paves the way for preparing multi-functional microwave absorbers derived from biomass raw materials under the guidance of RCS simulations.

Download Full-text

Biocompatibility and osteoconductivity of scaffold porous composite collagen–hydroxyapatite based coral for bone regeneration

Open Chemistry ◽

10.1515/chem-2020-0080 ◽

2020 ◽

Vol 18 (1) ◽

pp. 584-590 ◽

Cited By ~ 1

Author(s):

◽

Dyah Hikmawati ◽

Umi Kulsum ◽

Djony Izak Rudyardjo ◽

Retna Apsari ◽

...

Keyword(s):

Bone Regeneration ◽

Freeze Drying ◽

Bone Growth ◽

Viable Cell ◽

Drying Method ◽

Porous Composite ◽

Viable Cells

AbstractThe synthesis of collagen–hydroxyapatite composites has been carried out, and the biocompatibility and osteoconductivity properties have been tested. This research was conducted to determine the ability of hydroxyapatite–collagen composites to support the bone growth through the graft surface. Hydroxyapatite used in this study was synthesized from coral with a purity of 96.6%, while collagen was extracted from the chicken claw. The process of forming a scaffold of collagen–hydroxyapatite composites was carried out using the freeze-drying method at −80°C for 4 h. The biocompatibility characteristics of the sample through the cytotoxicity tests showed that the percentage of viable cells in collagen–hydroxyapatite biocomposite was 108.2%, which is higher than the percentage of viable cells of hydroxyapatite or collagen material. When the viable cell is above 100%, collagen–hydroxyapatite composites have excellent osteoconductivity as a material for bone regeneration.

Download Full-text

Construction of a CsPbBr3 modified porous g-C3N4 photocatalyst for effective reduction of CO2 and mechanism exploration

New Journal of Chemistry ◽

10.1039/d0nj04018e ◽

2021 ◽

Author(s):

Yunqi Wang ◽

Zhixiang Liu ◽

Xu Tang ◽

Pengwei Huo ◽

Zhi Zhu ◽

...

Keyword(s):

High Temperature ◽

Porous Structure ◽

Freeze Drying ◽

Drying Method ◽

Full Spectrum ◽

Effective Reduction ◽

Reduction Of Co2 ◽

High Temperature Calcination

A P-CN/CsPbBr3 photocatalyst with a lamellar porous structure was prepared by a high temperature calcination and freeze drying method, and it exhibited superior CO2 reduction performance under the conditions of full spectrum irradiation.

Download Full-text

CdS and Cd carboxylate nanoclusters dispersed in polymer matrix produced by a freeze drying method

European Polymer Journal ◽

10.1016/j.eurpolymj.2013.08.017 ◽

2013 ◽

Vol 49 (11) ◽

pp. 3530-3538 ◽

Cited By ~ 1

Author(s):

Chonggang Wu ◽

Thomas J. Emge ◽

Frederic Cosandey ◽

Masanori Hara

Keyword(s):

Polymer Matrix ◽

Freeze Drying ◽

Drying Method

Download Full-text

Sequential Infrared Radiation and Freeze-Drying Method for Producing Crispy Strawberries

Transactions of the ASABE ◽

10.13031/2013.24205 ◽

2008 ◽

Vol 51 (1) ◽

pp. 205-216 ◽

Cited By ~ 38

Author(s):

C. Shih ◽

Z. Pan ◽

T. McHugh ◽

D. Wood ◽

E. Hirschberg

Keyword(s):

Infrared Radiation ◽

Freeze Drying ◽

Drying Method

Download Full-text

Ruthenium Recovery from Acetic Acid Waste Solution by Using PEI-Coated Biomass-Chitosan Composite Fiber

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1130.577 ◽

2015 ◽

Vol 1130 ◽

pp. 577-580 ◽

Cited By ~ 1

Author(s):

Jeong Ae Kim ◽

Myung Hee Song ◽

Yeoung Sang Yun

Keyword(s):

Molecular Weight ◽

Acetic Acid ◽

Freeze Drying ◽

Ion Exchange Resin ◽

Composite Fiber ◽

Drying Methods ◽

Drying Method ◽

Waste Solution ◽

Chitosan Composite ◽

Acid Waste

Polyethylenimine (PEI)-coated biomass-chitosan composite fiber (PBCF) was fabricated to recover Ru from acetic acid waste solution. The present work aimed to understand the effects of molecular weight of chitosan and drying method on stability and sorption performance of the PBCF. For this, the PBCF was prepared by extruding the mixed solutions of chitosan and Corynebacteriumglutamicum to form the composite fibers which were modified with ionic polymer, PEI. The degree of swelling of PBCFs prepared by hot-air, natural, and freeze drying methods were 1.25, 1.34, and 1.07 %, respectively, indicating that the freeze-drying method was the best. Batch biosorption studies showed that the maximum Ru uptake could be achieved with PBCF prepared with medium molecular weight chitosan, and could reach 34.1 mg/g, which was 7.9 times higher than that of the commercial ion exchange resin, LEWATIT® MonoPlus M 500 (4.3 mg/g). Therefore, PBCF can be considered as an alternative sorbent to synthetic resin for recovery of Ru form industrial acetic acid waste solution.

Download Full-text

Three-dimensional MoSx(1 < x < 2) nanosheets decorated graphene aerogel for lithium–oxygen batteries

Journal of Materials Chemistry A ◽

10.1039/c6ta03804b ◽

2016 ◽

Vol 4 (28) ◽

pp. 10986-10991 ◽

Cited By ~ 21

Author(s):

Liangyu Li ◽

Chunguang Chen ◽

Junming Su ◽

Peng Kuang ◽

Congcong Zhang ◽

...

Keyword(s):

Freeze Drying ◽

Three Dimensional ◽

Drying Method ◽

Graphene Aerogel ◽

Graphene Aerogels ◽

3D Architecture ◽

Lithium Oxygen Batteries ◽

Potential Oxygen ◽

Oxygen Cathode

MoSx/graphene aerogels with a 3D architecture were synthesized using a hydrothermal and freeze-drying method and were further applied in Li–O2batteries as a potential oxygen cathode.

Download Full-text