Development of platform technology for gastro-resistant soft gel capsules by using the cross-linking technique

2021 ◽  
Vol 11 ◽  
Author(s):  
Raja Sekhar ◽  
Md. Shoaib Alam ◽  
Iftikhar Ahsan ◽  
Senthil Raja ◽  
Thusleem Mohamed ◽  
...  
Keyword(s):  
Drug Release ◽  
Cross Linking ◽  
Enteric Coating ◽  
Dual Approach ◽  
Gelatin Capsules ◽  
Soft Gelatin Capsules ◽  
Highly Sensitive ◽  
Enteric Polymer ◽  
The Cross ◽  
Predetermined Time

Introduction: Conventional enteric coating is very challenging in soft gel capsules because of shell nature (smooth surfaces and elasticity). Soft gelatin capsules are highly sensitive to temperature, humidity and it can lose their tensile strength during the conventional coating process. Materials and Methods: Enteric soft gel capsules were prepared by addition of enteric polymer in the gelatin shell composition by inducing the cross linking of gelatin through chemical treatment. Results: This dual approach makes the soft gelatin capsules to resist the drug release in stomach and reliably release their contents in the intestine within a predetermined time without affecting the physical properties of soft gel capsules. Conclusions: Enteric effect of soft gel capsules are brought by a specialized synergetic technique which is unique for the molecules which need intestinal drug release.

scholarly journals Modification of Ceiba pentandra cellulose for drug release applications

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 194-202
Author(s):  
Silvia Argelia Peraza-Ku ◽  
José Manuel Cervantes-Uc ◽  
Beatriz Escobar-Morales ◽  
Jorge Alonso Uribe-Calderon
Keyword(s):  
Drug Release ◽  
Release Kinetics ◽  
Cross Linking ◽  
Burst Release ◽  
Tetracarboxylic Acid ◽  
Ceiba Pentandra ◽  
Release Studies ◽  
The Cross ◽  
The Fourier Transform

AbstractTubular fibers (raw and wax-free) from Ceiba pentandra (CP) were cross-linked with butane-1,2,3,4-tetracarboxylic acid (BTCA) at different concentrations to obtain a porous biodegradable medium for drug release applications. Chlorhexidine diacetate (CHX) was added to the cross-linked fibers for drug release studies. The Fourier transform infrared spectroscopy, thermogravimetric analysis, and scanning electron microscopy results indicated that the cross-linked fibers with a 5:1 fiber:BTCA ratio presented the higher cross-linking density. CHX was added at different concentrations (8% and 16% wt/wt); the elemental analysis indicated that CHX was loaded up to 7.99 wt%. In vitro studies showed a burst release of CHX within the first 3 h. CHX release kinetics was described using several models, with the Korsmeyer–Peppas equation, which adjusted better to the experimental data. The results indicated that the CP fibers are a feasible material for drug release applications.

Evaluation of dissolution profiles of alpha lipoic acid soft gelatin capsules and tablets

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
A Uzunovic ◽  
S Hadzidedic ◽  
A Elezovic ◽  
S Pilipovic ◽  
A Sapcanin
Keyword(s):  
Lipoic Acid ◽  
Alpha Lipoic Acid ◽  
Gelatin Capsules ◽  
Soft Gelatin Capsules

scholarly journals Investigation of the functional network modifier loading on the stoichiometric ratio of epoxy resins and their dielectric properties

2021 ◽  
Author(s):  
Istebreq A. Saeedi ◽  
Sunny Chaudhary ◽  
Thomas Andritsch ◽  
Alun S. Vaughan
Keyword(s):  
Glass Transition ◽  
Dielectric Properties ◽  
Electrical Properties ◽  
Epoxy Resins ◽  
Functional Network ◽  
Cross Linking ◽  
Network Modifier ◽  
Epoxy Resin System ◽  
The Cross ◽  
The Impact

AbstractReactive molecular additives have often been employed to tailor the mechanical properties of epoxy resins. In addition, several studies have reported improved electrical properties in such systems, where the network architecture and included function groups have been modified through the use of so-called functional network modifier (FNM) molecules. The study reported here set out to investigate the effect of a glycidyl polyhedral oligomeric silsesquioxane (GPOSS) FNM on the cross-linking reactions, glass transition, breakdown strength and dielectric properties of an amine-cured epoxy resin system. Since many previous studies have considered POSS to act as an inorganic filler, a key aim was to consider the impact of GPOSS addition on the stoichiometry of curing. Fourier transform infrared spectroscopy revealed significant changes in the cross-linking reactions that occur if appropriate stoichiometric compensation is not made for the additional epoxide groups present on the GPOSS. These changes, in concert with the direct effect of the GPOSS itself, influence the glass transition temperature, dielectric breakdown behaviour and dielectric response of the system. Specifically, the work shows that the inclusion of GPOSS can result in beneficial changes in electrical properties, but that these gains are easily lost if consequential changes in the matrix polymer are not appropriately counteracted. Nevertheless, if the system is appropriately optimized, materials with pronounced improvements in technologically important characteristics can be designed.

scholarly journals The Effect of Surfactant-Modified Montmorillonite on the Cross-Linking Efficiency of Polysiloxanes

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2623
Author(s):  
Monika Wójcik-Bania ◽  
Jakub Matusik
Keyword(s):  
Total Pore Volume ◽  
Cross Linking ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
The Cross ◽  
Chain Lengths ◽  
First Time ◽  
Substituent Influence ◽  
Benzyl Substituent

Polymer–clay mineral composites are an important class of materials with various applications in the industry. Despite interesting properties of polysiloxanes, such matrices were rarely used in combination with clay minerals. Thus, for the first time, a systematic study was designed to investigate the cross-linking efficiency of polysiloxane networks in the presence of 2 wt % of organo-montmorillonite. Montmorillonite (Mt) was intercalated with six quaternary ammonium salts of the cation structure [(CH3)2R’NR]+, where R = C12, C14, C16, and R’ = methyl or benzyl substituent. The intercalation efficiency was examined by X-ray diffraction, CHN elemental analysis, and Fourier transform infrared (FTIR) spectroscopy. Textural studies have shown that the application of freezing in liquid nitrogen and freeze-drying after the intercalation increases the specific surface area and the total pore volume of organo-Mt. The polymer matrix was a poly(methylhydrosiloxane) cross-linked with two linear vinylsiloxanes of different siloxane chain lengths between end functional groups. X-ray diffraction and transmission electron microscopy studies have shown that the increase in d-spacing of organo-Mt and the benzyl substituent influence the degree of nanofillers’ exfoliation in the nanocomposites. The increase in the degree of organo-Mt exfoliation reduces the efficiency of hydrosilylation reaction monitored by FTIR. This was due to physical hindrance induced by exfoliated Mt particles.

Sign in / Sign up

Export Citation Format

Share Document