Article
Chemistry, Multidisciplinary
Ana V. Torres-Figueroa, Sergio de los Santos-Villalobos, Dora E. Rodriguez-Felix, Sergio F. Moreno-Salazar, Cinthia J. Perez-Martinez, Lerma H. Chan-Chan, Andres Ochoa-Meza, Teresa del Castillo-Castro
Summary: The preparation method of hydrogels has a significant impact on their properties. In this study, PVA/HA hydrogels were prepared using autoclaving and glutaraldehyde addition methods. The autoclaved hydrogels exhibited better microstructure, swelling levels, and water retention capacity, while the glutaraldehyde-cross-linked hydrogels promoted plant growth. The release behavior of urea was also influenced by the preparation method.
Article
Polymer Science
Seong Baek Yang, Mohammad Rezaul Karim, Jungeon Lee, Jeong Hyun Yeum, Sabina Yeasmin
Summary: Novel poly(vinyl alcohol)/poly(vinyl butyral-vinyl alcohol) films with improved hydrophobicity were prepared by saponification of poly(vinyl acetate)/poly(vinyl butyral) blend films. The saponification process was confirmed by various analysis techniques. The hydrophobicity of the films increased with increasing poly(vinyl butyral) content. The saponified films exhibited improved mechanical properties and unique surface characteristics. These films have potential applications in biomaterials, filters, and medical devices.
Article
Agriculture, Multidisciplinary
Wen Meng, Xu Zhang, Yang Zhang, Xianglu Zhang, Wending Zhu, Handa Huang, Xiaozhao Han, Yahua Liu, Chao Xu
Summary: The study developed eco-friendly and biodegradable PVA/SA membranes as alternative coatings for SRFs. The membranes were successfully fabricated with different PVA/SA weight ratios and crosslinked using glutaraldehyde and CaCl2 solution. The biodegradable membranes exhibited excellent hydrophilicity and degradation properties. The nitrogen release behavior of the PCU granules was accurately predicted using calculated values.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Engineering, Chemical
Shi-Hao Yang, Xiao-Jie Ju, Chuan-Fu Deng, Quan-Wei Cai, Yao-Yao Su, Rui Xie, Wei Wang, Zhuang Liu, Da-Wei Pan, Liang-Yin Chu
Summary: A novel strategy based on droplet microfluidics is developed for facile fabrication of monodisperse poly(vinyl alcohol) microspheres with controllable sizes and elastic properties for embolization. The cross-linking speed and degree between PVA and boric acid inside droplet templates can be controlled by adjusting the NaOH concentration, height, and rotating speed of the receiving solution. The sizes of droplet templates and resultant cross-linked PVA microspheres can be precisely controlled by adjusting the characteristic dimensions of the microfluidic device as well as the flow rates of disperse and continuous phases. The proposed strategy provides a facile and efficient route for fabricating monodisperse PVA microspheres with controllable properties, which are highly desired for applications in embolization therapy.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Amin Babaei-Ghazvini, Bishnu Acharya
Summary: The study investigates the effect of different aspect ratios of cellulose nanocrystals (CNCs) and their hybrid within a crosslinked poly (vinyl alcohol) (PVA) nanocomposite to develop biodegradable materials. The addition of CNC reduces film porosity. Covalent bonds are formed in all composites except wood-CNC reinforced composites, which show lower crosslinking and C-C formation. The dispersity of CNCs varies depending on their aspect ratio. The use of hybrid CNC significantly decreases solubility in water. The crosslinking and addition of CNC improve mechanical properties but decrease elongation at break in the nanocomposite.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Bianca-Elena-Beatrice Cretu, Alina Gabriela Rusu, Alina Ghilan, Irina Rosca, Loredana Elena Nita, Aurica P. Chiriac
Summary: A new cryogel system based on PVA and PEBSA was developed for the incorporation of thymol. The study aimed to confer antioxidant properties to the system by encapsulating a-Tcp. The PVA/PEBSA_Thy_a-Tcp systems were characterized and showed synergistic antimicrobial and antioxidant effects.
Article
Polymer Science
Shelly Km, Kartik Ravishankar, Dhamodharan Raghavachari
Summary: The flame resistance of poly(vinyl alcohol) (PVOH) is improved by transforming it into a copolymer using dichloroacetic acid (DCAA) through a green chemical process. The resulting copolymer shows excellent solubility in organic solvents while being inherently flame-retardant.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Engineering, Environmental
Tilak Gasti, Vishram D. Hiremani, Sheetal Suresh Kesti, Vinayak N. Vanjeri, Naganagouda Goudar, Saraswati P. Masti, Shivasharana Chandrabanda Thimmappa, Ravindra B. Chougale
Summary: In this study, PVA/GG based nanocomposite films were prepared with different weight ratios of AgNPs synthesized in situ, improving the hydrophobicity and thermal stability of the films. The nanocomposite films show potential for applications in food packaging.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Polymer Science
Afroditi Kapourani, Artemis Palamidi, Konstantinos N. Kontogiannopoulos, Nikolaos D. Bikiaris, Panagiotis Barmpalexis
Summary: This study aimed to evaluate the use of poly(propylene succinate) (PPSu) in the preparation of drug-loaded PVA-based amorphous solid dispersions to improve thermal properties and stability of the drug.
Article
Materials Science, Multidisciplinary
Ruizhe Lian, Jinxing Cao, Xiaohong Jiang, Aleksandr V. Rogachev
Summary: The CS/Gel/PVA/CIP composite films show a dual-stage release pattern for ciprofloxacin hydrochloride, achieving rapid sterilization and long-term antibacterial effect.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Chuang Zhang, Jiahui Wu, Xu Qiu, Jie Zhang, Huiqi Chang, Haifeng He, Lifen Zhao, Xin Liu
Summary: This study prepared cellulose micro-nanofibrils (CMNFs) from Enteromorpha (EP) and incorporated them into PVA/acetylated distarch phosphate (ADSP) composite films, resulting in increased tensile strength and elongation at break. SEM and polarizing microscope images confirmed that optimal dispersion of CMNFs in the films occurred with an addition of 2%-3% of total dry weight of the matrix. The addition of CMNFs also enhanced the thermostability and hydrophilicity of the composite films.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Polymer Science
Madhusmita Rawooth, S. K. Habibullah, Dilshad Qureshi, Deepti Bharti, Ankit Pal, Biswaranjan Mohanty, Maciej Jarzebski, Wojciech Smulek, Kunal Pal
Summary: This study evaluated the effect of tamarind gum on the properties of polyvinyl alcohol-based films, finding that the addition of TG enhanced phase separation and aggregation of PVA in the films. The interconnected network of PVA-TG aggregates affected the swelling, drying, and drug release potential of the films.
Article
Engineering, Chemical
Mahmoud M. A. Nassar, Khalid I. Alzebdeh, Sameer A. Awad, Eman M. Khalaf
Summary: In this study, new synthesis strategies for functionalizing poly (vinyl alcohol) (PVA) with azidation (Az) and alkynation (Alk) were carried out to modify the surface functionality of PVA. The Az and Alk functional groups were confirmed to successfully modify the PVA surface by spectral analysis. The addition of Az and Alk groups to PVA led to rougher surfaces and enhanced thermal stability.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Food Science & Technology
Guelce Bedis Kaynarca, Deniz Damla Altan Kamer, Tuncay Gumus, Osman Sagdic
Summary: This study examined the effect of grape pomace extract (GP) on PVA/FG blend films. The addition of different ratios of GP to the films improved their rheological properties and resulted in structural repositioning. GP enhanced intermolecular polymer interactions and surface smoothness. The addition of GP increased melting temperature, improved flexibility, and enhanced water solubility parameter and antioxidant activity of the films. A GP-enriched PVA/FG film can be used for food packaging purposes.
FOOD PACKAGING AND SHELF LIFE
(2023)
Article
Engineering, Chemical
Petros Oikonomou, Merope Sanopoulou, Kyriaki G. Papadokostaki
Summary: Blends of poly(vinyl alcohol) (PVA) and poly(vinyl pyrrolidone) (PVP) readily absorb water when exposed to external humidity. The physical properties of the blends, including glass transition temperature (Tg) and mechanical properties, are affected by the increase in water content, with a linear relation between the weight fraction of absorbed water and the blend composition observed. Differential scanning calorimetry results showed that the depression of Tg with increasing water content could be accurately described by empirical equations, and the Young modulus of hydrated samples experienced a significant decrease when the blend transitioned from a glassy to rubbery state.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Engineering, Biomedical
Julius Sundermann, Sarah Oehmichen, Steffen Sydow, Laura Burmeister, Bastian Quaas, Robert Haensch, Ursula Rinas, Andrea Hoffmann, Henning Menzel, Heike Bunjes
Summary: Different surface modifications of PCL fiber mats influence the binding and release of BMP-2, with polydopamine coating showing the highest binding capacity. Functionalization with chitosan nanogel considerably increases BMP-2 binding on all hydrophilized surfaces and results in sustained release without loss of bioactivity.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2021)
Article
Engineering, Chemical
Holger Bolze, Juliane Riewe, Heike Bunjes, Andreas Dietzel, Thomas P. Burg
Summary: Microfluidic processes show potential for producing nanoparticles with reproducible properties, but accidental production of larger particles remains a challenge. To address this issue, a class of microfluidic filters has been developed to eliminate particulate contamination in multistage continuous-flow processes, aiming to achieve higher filtration efficiency.
CHEMICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Pharmacology & Pharmacy
Jan Lenz, Heike Bunjes, Arno Kwade, Michael Juhnke
Summary: An experimental setup for simultaneous and real-time determination of water uptake and swelling of tablets has been developed. Water uptake was measured with a balance and swelling was measured with a camera, with a maximum deviation of 6% for both precision and accuracy. X-ray micro computed tomography was used to validate the accuracy of determining tablet volumes, showing good accordance within 6% deviation.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2021)
Article
Biochemistry & Molecular Biology
Nadine Monika Francke, Frederic Schneider, Knut Baumann, Heike Bunjes
Summary: The study investigated the general processability of CBD in colloidal lipid carriers, finding that high drug loads could be achieved in various types of emulsions. CBD loading increased particle size and the density of the lipid matrix, with CBD being associated with the lipid core and droplet interface. CBD destabilized the emulsions, with phospholipid-stabilized emulsions showing better stability than poloxamer-stabilized ones. Pure CBD emulsions could be produced due to CBD's supercooling tendency.
Article
Pharmacology & Pharmacy
Sabrina Knoke, Heike Bunjes
Summary: Understanding the release behavior and drug retention properties of colloidal carriers is crucial for quality control and predicting in vivo performance. This study investigated the transfer of various drugs from a trimyristin nanoemulsion to lipid-containing hydrogel beads, showing that drug transfer rate was influenced by logP value, with higher logP leading to slower transfer. The experimental setup provides a promising technique for studying the release of poorly water-soluble drugs from nanocarriers under closer to physiological conditions.
Article
Pharmacology & Pharmacy
Nadine M. Francke, Heike Bunjes
Summary: The localization of drug molecules in the interface of emulsion droplets has a significant impact on the stability of the emulsions stabilized with poloxamer 188.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2021)
Article
Pharmacology & Pharmacy
Julius Sundermann, Steffen Sydow, Laura Burmeister, Andrea Hoffmann, Henning Menzel, Heike Bunjes
Summary: This study investigated the release performance of BMP-2 from PCL fiber mat-based implant prototypes coated with chitosan nanogel, highlighting the significant effects of chitosan and solubilizing additives on the recovery rate of BMP-2 in in vitro release experiments.
Article
Engineering, Chemical
Holger Bolze, Juliane Riewe, Heike Bunjes, Andreas Dietzel, Thomas P. Burg
Summary: An ultrasound-assisted process has been successfully established for the precipitation of lipid nanoparticles in a microfluidic mixer, allowing for the production of nanoparticles without clogging over several hours. The analysis shows a small number of micron-sized particles, but they do not disrupt the process, improving the reliability of microfluidic precipitation and preventing the buildup of precipitates in the channels.
CHEMICAL ENGINEERING & TECHNOLOGY
(2021)
Article
Pharmacology & Pharmacy
Jan Lenz, Frederik Fuest, Jan Henrik Finke, Heike Bunjes, Arno Kwade, Michael Juhnke
Summary: In this study, 3D tomographic laser-induced fluorescence imaging (3D Tomo-LIF) was used to analyze the disintegration and dispersion of tablets. The results showed that fluid velocity has a strong impact on the disintegration and dispersion process, and the use of different disintegrants leads to different disintegration times. This method provides an in-depth understanding of the functional behavior of tablets and has improved biorelevance.
Article
Pharmacology & Pharmacy
Denise Steiner, Heike Bunjes
Summary: A new manufacturing process, dual centrifugation, is introduced for preparing solid lipid nanoparticles, which can complete the emulsification process in a short time and achieve particle sizes below 200 nm with a narrow, monomodal size distribution.
INTERNATIONAL JOURNAL OF PHARMACEUTICS-X
(2021)
Article
Pharmacology & Pharmacy
Jan Lenz, Jan Henrik Finke, Heike Bunjes, Arno Kwade, Michael Juhnke
Summary: The functional behavior of tablets is strongly influenced by their manufacturing process and the choice of excipients, with water uptake and swelling being prerequisites for tablet disintegration and dispersion. The study investigated the impact of tablet composition, porosity, and pH of the test medium on water uptake and swelling, with the findings showing that HPMC and Kollidon VA64 inhibit water uptake and swelling due to the formation of a GPN.
INTERNATIONAL JOURNAL OF PHARMACEUTICS-X
(2021)
Article
Materials Science, Biomaterials
Julius Sundermann, Steffen Sydow, Laura Burmeister, Andrea Hoffmann, Henning Menzel, Heike Bunjes
Summary: Temporally and spatially controlled growth factor release from a polycaprolactone fiber mat coated with chitosan-based nanogels shows promise for regenerating degenerated tendon-bone junctions, providing a matrix for cell colonization and infiltration.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2022)
Article
Pharmacology & Pharmacy
Martin Wewers, Jan Henrik Finke, Stefan Czyz, Bernard Van Eerdenbrugh, Edgar John, Guido Buch, Michael Juhnke, Heike Bunjes, Arno Kwade
Summary: The drying of nanosuspensions is advantageous for improving long-term stability and processing into solid dosage forms. This study investigates the applicability of a nanosuspension as a granulation liquid and the influence of formulation parameters on the structure of the obtained granules and their redispersibility. The results showed that higher dissolution rate of the carrier material and higher content of a matrix former resulted in the formation of coarser and more porous granules with improved nanoparticle redispersibility.
Article
Pharmacology & Pharmacy
Denise Steiner, Leonie V. Schumann, Heike Bunjes
Summary: Spray drying is a promising technology for drying lipid nanodispersions. The nanoparticulate properties can be maintained when lactose in combination with SDS is used as the matrix material. Higher inlet temperatures of 110 degrees C or above enable the formation of an amorphous matrix to protect the embedded lipid particles.
Article
Biochemical Research Methods
Peer Erfle, Juliane Riewe, Songtao Cai, Heike Bunjes, Andreas Dietzel
Summary: This research successfully prepared nanoparticles using microfluidic mixer technology, achieving narrow size distribution and high production efficiency. Mixing elements designed with two-photon polymerization technology and a fluidic shield layer can effectively improve mixing efficiency and prevent contamination.