Flexible aerogels with interpenetrating network structure of bacterial cellulose–silica composite from sodium silicate precursor via freeze drying process

RSC Advances ◽  
2014 ◽  
Vol 4 (57) ◽  
pp. 30453 ◽  
Author(s):  
Huazheng Sai ◽  
Li Xing ◽  
Junhui Xiang ◽  
Lijie Cui ◽  
Jianbin Jiao ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Sodium Silicate ◽  
Network Structure ◽  
Freeze Drying ◽  
Drying Process ◽  
Interpenetrating Network ◽  
Silica Composite

Ultralight nanocomposite aerogels with interpenetrating network structure of bacterial cellulose for oil absorption

2019 ◽  
Vol 136 (39) ◽  
pp. 48000
Author(s):  
Xiaolin Nie ◽  
Pengfei Lv ◽  
Sarah L. Stanley ◽  
Di Wang ◽  
Shuanglin Wu ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Network Structure ◽  
Oil Absorption ◽  
Interpenetrating Network

scholarly journals An environmentally benign approach to achieving vectorial alignment and high microporosity in bacterial cellulose/chitosan scaffolds

RSC Advances ◽  
2017 ◽  
Vol 7 (23) ◽  
pp. 13678-13688 ◽  
Author(s):  
Guohui Li ◽  
Avinav G. Nandgaonkar ◽  
Youssef Habibi ◽  
Wendy E. Krause ◽  
Qufu Wei ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Liquid Nitrogen ◽  
Freeze Drying ◽  
Environmentally Benign ◽  
Porous Scaffolds ◽  
Drying Process ◽  
Chitosan Scaffolds ◽  
Komagataeibacter Xylinus ◽  
Ice Templating

Bacterial cellulose (BC) nanofibers secreted by Komagataeibacter xylinus 10245 were applied alone or with chitosan to prepare highly aligned and porous scaffolds through a liquid nitrogen-initiated ice “templating” and freeze-drying process.

scholarly journals Preparation of Scaffolds of Amorphous Calcium Phosphate and Bacterial Cellulose for Use in Tissue Regeneration by Freeze-Drying Process

2020 ◽  
Vol 11 (1) ◽  
pp. 7357-7367
Keyword(s):  
Calcium Phosphate ◽  
Bacterial Cellulose ◽  
Tissue Regeneration ◽  
Amorphous Calcium Phosphate ◽  
Freeze Drying ◽  
Calcium Phosphates ◽  
Synthetic Polymers ◽  
Drying Process ◽  
Cytotoxicity Studies ◽  
The One

The elaboration of scaffolds for use in tissue regeneration processes plays an important role in the area of biomaterials. Natural and synthetic polymers, together with calcium phosphates, form suitable compounds for these studies because their combinations favor the union of the properties of both materials, such as their biocompatibility, biofunctionality, shape, porosity, and mechanical properties. The objective of this work was to develop a scaffold of amorphous calcium phosphate and bacterial cellulose, applying a freeze-drying process. The results demonstrated the feasibility of scaffolds elaboration applying the freeze-drying methodology. The formulation that presented the best results was the one that contained amorphous calcium phosphate (50%), bacterial cellulose gel (20%), and sodium alginate (30%). Cytotoxicity studies showed that the studied formulation did not present cytotoxicity, promoting cell viability.

Flexible aerogels based on an interpenetrating network of bacterial cellulose and silica by a non-supercritical drying process

2013 ◽  
Vol 1 (27) ◽  
pp. 7963 ◽  
Author(s):  
Huazheng Sai ◽  
Li Xing ◽  
Junhui Xiang ◽  
Lijie Cui ◽  
Jianbin Jiao ◽  
...  
Keyword(s):  
Bacterial Cellulose ◽  
Supercritical Drying ◽  
Drying Process ◽  
Interpenetrating Network

Video real-time imaging of artificial membranes during freeze-drying by cryo-electron microscopy

1988 ◽  
Vol 46 ◽  
pp. 16-17
Author(s):  
Alan S. Rudolph ◽  
Ronald R. Price
Keyword(s):  
Real Time ◽  
Self Assembly ◽  
Freeze Drying ◽  
Video Capture ◽  
Drying Process ◽  
Artificial Membranes ◽  
The Past ◽  
Cryo Electron Microscopy ◽  
Spherical Structures ◽  
Capture Techniques

We have employed cryoelectron microscopy to visualize events that occur during the freeze-drying of artificial membranes by employing real time video capture techniques. Artificial membranes or liposomes which are spherical structures within internal aqueous space are stabilized by water which provides the driving force for spontaneous self-assembly of these structures. Previous assays of damage to these structures which are induced by freeze drying reveal that the two principal deleterious events that occur are 1) fusion of liposomes and 2) leakage of contents trapped within the liposome [1]. In the past the only way to access these events was to examine the liposomes following the dehydration event. This technique allows the event to be monitored in real time as the liposomes destabilize and as water is sublimed at cryo temperatures in the vacuum of the microscope. The method by which liposomes are compromised by freeze-drying are largely unknown. This technique has shown that cryo-protectants such as glycerol and carbohydrates are able to maintain liposomal structure throughout the drying process.

scholarly journals Strengthening of Porcine Plasma Protein Superabsorbent Materials through a Solubilization-Freeze-Drying Process

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 772
Author(s):  
Estefanía Álvarez-Castillo ◽  
Carlos Bengoechea ◽  
Antonio Guerrero
Keyword(s):  
Water Uptake ◽  
Plasma Protein ◽  
Freeze Drying ◽  
Meat Industry ◽  
Drying Process ◽  
Uptake Capacity ◽  
Water Uptake Capacity ◽  
Protein Flour ◽  
Hydrophilic Materials ◽  
By Products

The replacement of common acrylic derivatives by biodegradable materials in the formulation of superabsorbent materials would lessen the associated environmental impact. Moreover, the use of by-products or biowastes from the food industry that are usually discarded would promote a desired circular economy. The present study deals with the development of superabsorbent materials based on a by-product from the meat industry, namely plasma protein, focusing on the effects of a freeze-drying stage before blending with glycerol and eventual injection molding. More specifically, this freeze-drying stage is carried out either directly on the protein flour or after its solubilization in deionized water (10% w/w). Superabsorbent materials obtained after this solubilization-freeze-drying process display higher Young’s modulus and tensile strength values, without affecting their water uptake capacity. As greater water uptake is commonly related to poorer mechanical properties, the proposed solubilization-freeze-drying process is a useful strategy for producing strengthened hydrophilic materials.

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