scholarly journals Facile Tailoring of Structures for Controlled Release of Paracetamol from Sustainable Lignin Derived Platforms

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1593
Author(s):  
Mario Culebras ◽  
Mahboubeh Pishnamazi ◽  
Gavin M. Walker ◽  
Maurice N. Collins
Keyword(s):  
Paper Industry ◽  
Chemical Properties ◽  
Crosslinking Density ◽  
Diglycidyl Ether ◽  
Hydrogel Network ◽  
Swelling Capacity ◽  
Sustainable Materials ◽  
Poly Ethylene ◽  
Significant Attention ◽  
And Chemical Properties

Nowadays, sustainable materials are receiving significant attention due to the fact that they will be crucial for the development of the next generation of products and devices. In the present work, hydrogels have been successfully synthesized using lignin which is non-valorized biopolymer from the paper industry. Hydrogels were prepared via crosslinking with Poly(ethylene) glycol diglycidyl ether (PEGDGE). Different crosslinker ratios were used to determine their influence on the structural and chemical properties of the resulting hydrogels. It has been found that pore size was reduced by increasing crosslinker amount. The greater crosslinking density increased the swelling capacity of the hydrogels due to the presence of more hydrophilic groups in the hydrogel network. Paracetamol release test showed higher drug diffusion for hydrogels produced with a ratio lignin:PEGDGE 1:1. The obtained results demonstrate that the proposed approach is a promising route to utilize lignocellulose waste for producing porous materials for advanced biomedical applications in the pharmacy industry.

Tailoring lanthanide doping in perovskite CaTiO3 for luminescence applications

2017 ◽  
Vol 19 (24) ◽  
pp. 16189-16197 ◽  
Author(s):  
Pei Yang ◽  
Bo Tai ◽  
Weikang Wu ◽  
Jian-Min Zhang ◽  
Feng Wang ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Perovskite Oxide ◽  
Promising Material ◽  
Oxide Materials ◽  
Physical And Chemical Properties ◽  
Lanthanide Doping ◽  
Physical And Chemical ◽  
Significant Attention ◽  
And Chemical Properties

Perovskite oxide materials have been attracting significant attention due to their rich physical and chemical properties. Lanthanide-doped perovskite CaTiO3 can be a promising material for biological luminescence applications.

Status of the utilization of jack pine (Pinusbanksiana) in the pulp and paper industry

1994 ◽  
Vol 24 (10) ◽  
pp. 2078-2084 ◽  
Author(s):  
Kwei-Nam Law ◽  
Jacques L. Valade
Keyword(s):  
Paper Industry ◽  
Chemical Properties ◽  
Pulp And Paper Industry ◽  
Jack Pine ◽  
Chemical Processes ◽  
Future Research ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
Potential Use ◽  
And Chemical Properties

Although jack pine (Pinusbanksiana Lamb.), which represents 20% of the total softwood volume, is one of the most abundant commercial softwood species in Canada, its rate of utilization in pulping is surprisingly low. This paper reviews the literature concerning the physical and chemical properties as well as the pulping characteristics of this species by mechanical, thermomechanical, chemithermomechanical, chemimechanical, and chemical processes to better understand its potential use in papermaking. The objective is to identify the problems related to the use of jack pine so that solutions might be sought to promote its usage. Some recommendations are put forth concerning future research.

scholarly journals A Blueprint for the Synthesis and Characterization of Thiolated Graphene

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 45
Author(s):  
Maxim K. Rabchinskii ◽  
Victor V. Sysoev ◽  
Sergei A. Ryzhkov ◽  
Ilya A. Eliseyev ◽  
Dina Yu. Stolyarova ◽  
...  
Keyword(s):  
Smart Materials ◽  
Chemical Properties ◽  
Research Community ◽  
Physical And Chemical Properties ◽  
Facile Synthesis ◽  
The Core ◽  
Physical And Chemical ◽  
Significant Attention ◽  
And Chemical Properties

Graphene derivatization to either engineer its physical and chemical properties or overcome the problem of the facile synthesis of nanographenes is a subject of significant attention in the nanomaterials research community. In this paper, we propose a facile and scalable method for the synthesis of thiolated graphene via a two-step liquid-phase treatment of graphene oxide (GO). Employing the core-level methods, the introduction of up to 5.1 at.% of thiols is indicated with the simultaneous rise of the C/O ratio to 16.8. The crumpling of the graphene layer upon thiolation without its perforation is pointed out by microscopic and Raman studies. The conductance of thiolated graphene is revealed to be driven by the Mott hopping mechanism with the sheet resistance values of 2.15 kΩ/sq and dependable on the environment. The preliminary results on the chemiresistive effect of these films upon exposure to ethanol vapors in the mix with dry and humid air are shown. Finally, the work function value and valence band structure of thiolated graphene are analyzed. Taken together, the developed method and findings of the morphology and physics of the thiolated graphene guide the further application of this derivative in energy storage, sensing devices, and smart materials.

scholarly journals Application of Enzyme for Bleaching of Wheat Straw AQ-Soda Pulp

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Ghafoor A ◽  
Cheema K. J. ◽  
Yaqoob N. ◽  
Rehman I.Ur- ◽  
Said A
Keyword(s):  
Hydrogen Peroxide ◽  
Wheat Straw ◽  
Paper Industry ◽  
Chemical Properties ◽  
Elemental Chlorine ◽  
Metal Contents ◽  
Soda Pulp ◽  
Physical And Chemical ◽  
Toxic Load ◽  
And Chemical Properties

Pulp and paper industry is one of the major contributors to environmental pollution due to its toxic and carcinogenic discharges during its various processes e.g., chlorinated bleaching of the pulp. Use of alternative bleaching chemicals e.g., enzyme and/or elemental chlorine free (ECF) or total chlorine free (TCF) agents are the best option to reduce the load of carcinogenic chlorinated compounds on our environment. Present study was carried out to highlight the application of enzyme during bleaching of wheat straw anthraquinon (AQ)-soda pulp to considerably reduce the toxic load on the environment. Wheat straw AQ-soda pulp was treated with acid (A) to reduce its metal contents followed by oxygen (O) delignification. Delignified pulp was then subjected to enzymatic (X) treatment with xylanase prior to bleaching to increase the effectiveness of successive bleaching with hydrogen peroxide (P). Handsheets were prepared from the treated pulp after each experimental trial to study its various optical, physical and chemical properties. Brightness of bleached pulp was improved up to ISO 73% with AOXP1P2 bleaching sequence. The improved brightness up to ISO 76% was achieved when alkali extraction stage was incorporated before bleaching with hydrogen peroxide (AOXEP1P2). TDS, COD and BOD5 of effluent samples during different experimental stages was monitored and compared with NEQS. It was evident from the results that enzymatic treatment not only helped to reduce the effluent load but also reduced the consumption of bleaching chemicals to achieve good brightness values.

Progress of Graphene-Based Hydrogel

2016 ◽  
Vol 852 ◽  
pp. 714-719
Author(s):  
Yu Xiang ◽  
Li Bin Liu ◽  
Zhao Dang ◽  
Ting Li
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Two Dimensional ◽  
Reduced Graphene ◽  
Physical And Chemical ◽  
Significant Attention ◽  
And Chemical Properties

Graphene, a typical two-dimensional planar monolayer of sp2carbon atoms, has attracted significant attention due to its outstanding physical and chemical properties. Nowadays, many graphene-based composites have been synthesized. Among them, graphene hydrogels (including graphene oxide hydrogel and reduced graphene oxide hydrogel) as a kind of graphene-based composites have a wide application prospect. In this paper, the progresses of graphene-based hydrogels are reviewed, and the prospects for the development of graphene-based hydrogels are also discussed.

scholarly journals Nano-Structured Lignin as Green Antioxidant and UV Shielding Ingredient for Sunscreen Applications

Antioxidants ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 274
Author(s):  
Davide Piccinino ◽  
Eliana Capecchi ◽  
Elisabetta Tomaino ◽  
Sofia Gabellone ◽  
Valeria Gigli ◽  
...  
Keyword(s):  
Low Cost ◽  
Paper Industry ◽  
Chemical Properties ◽  
Pulp And Paper Industry ◽  
Physical And Chemical Properties ◽  
Uv Shielding ◽  
Structure Activity ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Nanoscale Level

Green, biocompatible, and biodegradable antioxidants represent a milestone in cosmetic and cosmeceutical applications. Lignin is the most abundant polyphenol in nature, recovered as a low-cost waste from the pulp and paper industry and biorefinery. This polymer is characterized by beneficial physical and chemical properties which are improved at the nanoscale level due to the emergence of antioxidant and UV shielding activities. Here we review the use of lignin nanoparticles in cosmetic and cosmeceutical applications, focusing on sunscreen and antiaging formulations. Advances in the technology for the preparation of lignin nanoparticles are described highlighting structure activity relationships.

scholarly journals Purity and structural composition of lignin isolated from Miscanthus x giganteus by sub-critical water extraction with associated modifiers

2020 ◽  
Vol 1 (1) ◽  
pp. 1-12 ◽  
Keyword(s):  
Paper Industry ◽  
Chemical Properties ◽  
Value Added ◽  
Hydroxyl Groups ◽  
Physical And Chemical Properties ◽  
Miscanthus X Giganteus ◽  
Lignin Recovery ◽  
Physical And Chemical ◽  
The Impact ◽  
And Chemical Properties

Lignin is an industrial by-product produced from the pulping and paper industry, where the process generates lignin in the form of lignosulphonates. While there are many applications for lignin, there are all low value and attempts to add value to lignin are hindered by its complex physicochemical nature and the presence of sulphur. Adopting the biorefining concept, the study evaluates the impact of direct (DE) and sequential extraction (SE) of Miscanthus x giganteus using sub-critical water with associated modifiers; ethanol and carbon dioxide on the physical and chemical properties of the extracted lignin. Isolated lignins were characterised by a Fourier Transform Infrared Spectroscopy (FTIR). Although higher delignification was achieved by DE and SE about 81.5% and 58.0%, respectively, the lignin recovered from the SE process showed remarkably higher purity with 91.5%. Lignin recovery did not differ considerably for either processing method. FTIR revealed a qualitative reduction in the intensity of bonds corresponding to hydroxyl groups for the lignin derived from DE rather than SE processing routes. These indicated that the lignin derived from SE had potential for subsequent preparation in lignin value-added bio-based materials.

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