Crystallization behavior of spray-dried and freeze-dried graphene oxide/poly(trimethylene terephthalate) composites

2014 ◽  
Vol 131 (11) ◽  
pp. n/a-n/a ◽  
Author(s):  
Chengxin Guo ◽  
Liangliang Ji ◽  
Yaowen Li ◽  
Xiaoming Yang ◽  
Yingfeng Tu
Keyword(s):  
Graphene Oxide ◽  
Crystallization Behavior ◽  
Freeze Dried ◽  
Trimethylene Terephthalate ◽  
Spray Dried

Crystalline Morphology and Crystallization Behavior of Poly(Trimethylene Terephthalate)/Functionalized Graphene Oxide Nanocomposites Prepared by Melt Compounding

2019 ◽  
Vol 814 ◽  
pp. 96-101
Author(s):  
Kun Yan Wang
Keyword(s):  
Graphene Oxide ◽  
Crystallization Behavior ◽  
Optical Microscope ◽  
Degree Of Crystallinity ◽  
Functionalized Graphene ◽  
Crystalline Morphology ◽  
Scanning Calorimetry ◽  
Functionalized Graphene Oxide ◽  
Melt Compounding ◽  
Trimethylene Terephthalate

Poly (trimethylene terephthalate) (PTT)/functionalized graphene oxide (fGO) nanocomposites were prepared by melt compounding. The crystalline morphology and crystallization behavior of PTT/fGO with different amounts of fGO were investigated by differential scanning calorimetry (DSC) and polarizing optical microscope (POM). The results show that the crystallization peak shifts to higher temperature after adding fGO, indicating that fGO have a nucleating effect on PTT. The crystallization temperature of nanocomposites increases with increasing content of fGO. The XRD pattern of PTT/fGO nanocomposites almost no change that indicated the degree of crystallinity of the PTT matrix remained unaffected by the addition of fGO. The nanocomposite revealed integrated Maltese crossed spherulitic morphologies. When adding 1% fGO to the PTT, big-sized PTT spherulites occurred and small-sized PTT spherulites were formed around the big-sized PTT spherulites which indicated that the mechanism of nucleation is changed.

Storage stability of freeze-dried, spray-dried and drum-dried skim milk powders evaluated by available lysine

LWT ◽  
2016 ◽  
Vol 73 ◽  
pp. 675-682 ◽  
Author(s):  
Kataneh Aalaei ◽  
Marilyn Rayner ◽  
Ingegerd Sjöholm
Keyword(s):  
Storage Stability ◽  
Skim Milk ◽  
Freeze Dried ◽  
Available Lysine ◽  
Spray Dried

scholarly journals Freeze versus Spray Drying for Dry Wild Thyme (Thymus serpyllum L.) Extract Formulations: The Impact of Gelatin as a Coating Material

2021 ◽  
Author(s):  
Aleksandra A. Jovanović ◽  
Steva M. Lević ◽  
Vladimir B. Pavlovic ◽  
Smilja B. Markovic ◽  
Rada V. Pjanovic ◽  
...  
Keyword(s):  
Spray Drying ◽  
Dry Weight ◽  
Drying Process ◽  
Scanning Calorimetry ◽  
Coating Agent ◽  
Microwave Assisted ◽  
Freeze Dried ◽  
Wild Thyme ◽  
The Impact ◽  
Spray Dried

Freeze drying was compared with spray drying regarding feasibility to process wild thyme drug in order to obtain dry formulations at laboratory scale starting from liquid extracts produced by different extraction methods: maceration, heat-, ultrasound-, and microwave-assisted extractions. Higher powder yield (based on the dry weight prior to extraction) was achieved by freeze than spray drying and lower loss of total polyphenol content (TPC) and total flavonoid content (TFC) due to the drying process. Gelatin as a coating agent (5% w/w) provided better TPC recovery by 70% in case of lyophilization and higher powder yield in case of spray drying by diminishing material deposition on the wall of the drying chamber. The resulting gelatin-free and gelatin-containing powders carried polyphenols in amount ~190 and 53-75 mg gallic acid equivalents GAE/g of powder, respectively. Microwave-assisted extract formulation distinguished from others by higher content of polyphenols, proteins and sugars, higher bulk density and lower solubility. The type of the drying process affected mainly position of the gelatin-derived -OH and amide bands in FTIR spectra. Spray dried formulations compared to freeze dried expressed higher thermal stability as confirmed by differential scanning calorimetry analysis and higher diffusion coefficient; the last feature can be associated with the lower specific surface area of irregularly shaped freeze-dried particles (151-223 µm) compared to small microspheres (~8 µm) in spray-dried powder.

Comparison of the Thermal Transitions of Spray-Dried and Freeze-Dried Egg Whites by Differential Scanning Calorimetry

2020 ◽  
Vol 13 (8) ◽  
pp. 1329-1343
Author(s):  
Jin-Hong Zhao ◽  
Li-Sha Liu ◽  
Shyam S. Sablani ◽  
Yi-Jiao Peng ◽  
Hong-Wei Xiao ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Thermal Transitions ◽  
Scanning Calorimetry ◽  
Freeze Dried ◽  
Spray Dried

Stabilizing and destabilizing effects of drug-excipient interactions in spray-dried, freeze-dried, and granulated Sennae fructus extracts

2019 ◽  
Vol 38 (14) ◽  
pp. 1882-1890
Author(s):  
Kira-Isabel Zier ◽  
Wulf Schultze ◽  
Uta Sazama ◽  
Michael Fröba ◽  
Claudia S. Leopold
Keyword(s):  
Freeze Dried ◽  
Spray Dried ◽  
Excipient Interactions

Incorporation of spray dried and freeze dried blackberry particles in edible films: Morphology, stability to pH, sterilization and biodegradation

2019 ◽  
Vol 20 ◽  
pp. 100313 ◽  
Author(s):  
Gislaine Ferreira Nogueira ◽  
Farayde Matta Fakhouri ◽  
Rafael Augustus de Oliveira
Keyword(s):  
Edible Films ◽  
Freeze Dried ◽  
Spray Dried

Properties and Stability of Spray-Dried and Freeze-Dried Microcapsules Co-Encapsulated with Fish Oil, Phytosterol Esters, and Limonene

2013 ◽  
Vol 31 (6) ◽  
pp. 707-716 ◽  
Author(s):  
Qiong Chen ◽  
Fang Zhong ◽  
Jingyuan Wen ◽  
Duncan McGillivray ◽  
Siew Young Quek
Keyword(s):  
Fish Oil ◽  
Phytosterol Esters ◽  
Freeze Dried ◽  
Spray Dried
Sign in / Sign up

Export Citation Format

Share Document