scholarly journals One-Pot Fabrication Cellulose/Silica Composite Microcapsules and Their Application in Cotton Fabrics

2021 ◽  
Author(s):  
Ling Lin ◽  
Chunxia Wang ◽  
Haiyan Mao ◽  
Huanling Wu ◽  
Ziyin Li
Keyword(s):  
Slow Release ◽  
Uv Protection ◽  
Modified Silica ◽  
One Pot ◽  
Uv Absorber ◽  
Coupling Reagent ◽  
Coated Fabric ◽  
Release Property ◽  
Function Combination ◽  
Finishing Agent

Abstract Research on multi-functional fabrics is an inevitable trend in the future development of textile field. Nevertheless, the key to the development of multifunctional fabric is how to solve the problem of contradictory function combination and how to achieve the multifunctions. In this work, a novel multifunctional fabric based on cellulose/silica microcapsules was developed by using green, facile and economical methods. Owing to the loaded essence and hydrophobic coupling reagent and UV absorber modified silica of microcapsules, the coated fabric not only exhibited slow-release property of fragrance, but also had excellent superhydrophobicity and ultraviolet (UV) protection. Furthermore, multifunctional fabric also displayed the durable superhydrophobicity and UV protection even after chemically or mechanically damaged. The development of mulfunctional fabrics largely depends on the development of textile functional finishing agent and finishing technology. Therefore, it is very important to develop new functional micrcapsules or finishing agent.

scholarly journals Preparation and properties of hydrogel based on sawdust cellulose for environmentally friendly slow release fertilizers

2020 ◽  
Vol 9 (1) ◽  
pp. 139-152 ◽  
Author(s):  
Xiao Zhang ◽  
Yanlu Liu ◽  
Panfang Lu ◽  
Min Zhang
Keyword(s):  
Slow Release ◽  
Environmentally Friendly ◽  
Water Absorbency ◽  
The Novel ◽  
Structure And Properties ◽  
Nitrogen Release ◽  
Release Property ◽  
Slow Release Fertilizers ◽  
Grafting Copolymerization ◽  
Cross Linker

AbstractA novel hydrogel slow-release nitrogen fertilizer based on sawdust with water absorbency was prepared using grafting copolymerization. Urea was incorporated as nitrogen source in a hydrogel fertilizer. Potassium persulfate (KPS) and N,N᾽-methylenebis acrylamide (MBA) were used as the initiator and cross-linker, respectively. The structure and properties of the samples were characterized by XPS, EDS, SEM, XRD and FTIR. The effects of various salt solutions, ionic strength and pH on swelling behavior were discussed. The results showed that the largest water absorbency of the sample reached 210 g/g in distilled water. In addition, the sample had the good nitrogen release property. Thus, the novel environmentally friendly hydrogel fertilizer may be widely applied to agricultural and horticultural fields.

One-pot synthesis and application of novel amino-functionalized silica nanoparticles using guanidine as amino group

2016 ◽  
Vol 40 (10) ◽  
pp. 8444-8450 ◽  
Author(s):  
Feng Guodong ◽  
Guan Mingming ◽  
Lai Qi ◽  
Mi Hongyu ◽  
Li Guanghua ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Silica Nanoparticles ◽  
Amino Group ◽  
Functionalized Silica ◽  
Henry Reaction ◽  
Modified Silica ◽  
One Pot ◽  
One Pot Synthesis ◽  
Modified Silica Nanoparticles ◽  
Functionalized Silica Nanoparticles

The preparation of modified silica nanoparticles with guanidine was developed and used to catalyze the Henry reaction and fix quantum dots.

scholarly journals Preparation of Carboxymethylchitosan Nanoparticles with Acid-Sensitive Bond Based on Solid Dispersion of 10-Hydroxycamptothecin

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
Risheng Yao ◽  
Lu Liu ◽  
Shengsong Deng ◽  
Weitao Ren
Keyword(s):  
Solid Dispersion ◽  
Slow Release ◽  
Solid Dispersions ◽  
Tumor Therapy ◽  
Cumulative Release ◽  
Grafting Reaction ◽  
Release Property ◽  
Acid Environment ◽  
Model Drug ◽  
Colloid Systems

Solid dispersions were prepared by a conventional solvent evaporation method from the water-insoluble model drug 10-hydroxycamptothecin (HCPT) and monomethoxypoly(ethylene glycol) 2000 (mPEG 2000). And then one type of novel biodegradable nanoparticles, the solid dispersion (HCPT/mPEG-CHO) grafted with carboxymethylchitosan (HCPT/mPEG-g-CMCTS) was synthesized. The increase in HCPT solubility of solid dispersion was up to 21-fold compared with the original drug. With the increasing of the amount of mPEG-CHO, solubility of HCPT was from 7.71 μg/mL to 25.82 μg/mL. Colloid systems based on solid dispersion were stable in aqueous medium at 5°C. After 5 months storage at 25°C, the solid dispersions do not change at all. HCPT/mPEG-g-CMCTS was synthesized by grafting reaction of carboxymethylchitosan with mPEG-CHO to form Schiff base which is sensitive to acid environment. The release rate of HCPT from this conjugate in pH 5.4 was much higher than that in the environment of pH 7.4 and p H 4.5. The cumulative release percentages are 45%, 25%, and 15%, respectively. The cumulative release percentage of HCPT in conjugate was only 15% within 85 h while the original drug was up to 70% in pH 7.4, showing a significant slow-release property. This drug model can be attractive candidates as delivery biosystems in tumor therapy.

Preparation of an Environmental Friendly Slow Release Nitrogen Fertilizer

2014 ◽  
Vol 1015 ◽  
pp. 346-349 ◽  
Author(s):  
Jing Li ◽  
Yu Sen Hu ◽  
Lu Mei Pu ◽  
Guang Sheng Guo ◽  
Hong Yan Niu
Keyword(s):  
Slow Release ◽  
Nitrogen Release ◽  
Dialdehyde Starch ◽  
Element Analysis ◽  
Modern Agriculture ◽  
Environmental Friendly ◽  
Release Property ◽  
Potential Applications ◽  
Early Farming ◽  
Slow Release Urea

An environmental friendly slow-release urea fertilizer with double films (SUFDF) was prepared by using dialdehyde starch urea resin (DASU) as inner coating and polylactic acid (PLA) as outer materials. The structural, chemical characteristics and morphology of the SUFDF were characterized by FTIR, element analysis and SEM. Its efficiency in slowing the nitrogen release was examined via soil leaching and pot experiments. The experimental results indicated that the introduction of hydrophobic PLA and DASU reduced the swell ability of the fertilizer, which made it can provide nitrogen persistently at the early farming. After the urea dissolved, the DASU in the fertilizer would continue to release nitrogen due to its good slow-release property. So this fertilizer would have potential applications in modern agriculture and horticulture.

Trace water/amino-modified silica aerogel catalytic system in the one-pot sequential reaction of benzaldehyde dimethyl acetal and nitromethane

2017 ◽  
Vol 90 ◽  
pp. 106-110 ◽  
Author(s):  
Xiaolan Feng ◽  
Lijun Wang ◽  
Xiandong Yao ◽  
Huaping Dong ◽  
Xiaoxia Wang ◽  
...  
Keyword(s):  
Catalytic System ◽  
Silica Aerogel ◽  
Dimethyl Acetal ◽  
Modified Silica ◽  
One Pot ◽  
Sequential Reaction ◽  
The One ◽  
Trace Water
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