Gelation, flame retardancy, and physical properties of phosphorylated microcrystalline cellulose aerogels

2020 ◽  
Vol 242 ◽  
pp. 116422 ◽  
Author(s):  
Fukun Niu ◽  
Ningjing Wu ◽  
Jihang Yu ◽  
Xiaobing Ma
2020 ◽  
Vol 26 (4) ◽  
pp. 423-433
Author(s):  
Karnjana Sawangpet ◽  
Alif Walong ◽  
Bencha Thongnuanchan ◽  
Azizon Kaesaman ◽  
Tadamoto Sakai ◽  
...  

2017 ◽  
Vol 67 (2) ◽  
pp. 187-202 ◽  
Author(s):  
Aleš Franc ◽  
Slavomir Kurhajec ◽  
Sylvie Pavloková ◽  
Dana Sabadková ◽  
Jan Muselík

AbstractThe aim of this study was to find the optimal tablet composition with maximum content of dried fruits (Cornus mas L.). The effect of three different concentrations (12.5, 25 and 50 %) of two types of microcrystalline cellulose (Avicel®PH 101 and Avicel®PH 200) and three different compression pressures (20, 60 and 100 MPa) on the physical properties of tablet blends and tablets was studied. Tablets containing 50 % Avicel®PH 101 compressed under 100 MPa were found to have the best physical properties. This combination of composition and compression pressure resulted in stable tablets even after storage under accelerated stability conditions (6 months, 40 °C and 75 % RH).


1984 ◽  
Vol 2 (3) ◽  
pp. 236-247 ◽  
Author(s):  
John V. Beninate ◽  
Brenda J. Trask ◽  
George L. Drake

Durable phosphorus-based flame retardants containing polyacrylate emul sions were applied to cotton, cotton-polyester, and cotton-wool twill fabrics to study the effect of the added polyacrylates on the physical properties and flame retardancy. The Thps-urea-TMM flame retardant with added polyacrylate im parted better overall physical properties to 100% cotton fabric than to cotton blend fabrics. Treatments containing polyacrylates with low glass transition temperatures produced fabrics with the highest abrasion resistance, tearing strength and wrinkle recovery. The flame retardancy of treated fabrics was not adversely affected by the addition of polyacrylates to the flame retardant treatments.


Polymer Korea ◽  
2015 ◽  
Vol 39 (3) ◽  
pp. 433-440
Author(s):  
Minho Lee ◽  
Dayeong Yu ◽  
Yeongho Kim ◽  
Sunghee Lee ◽  
Jeong Ho Kim ◽  
...  

2021 ◽  
Vol 16 (1) ◽  
pp. 11-16
Author(s):  
Yanhong Fang ◽  
Ping Wang ◽  
Lifang Sun ◽  
Linhong Wang

With the increasing application of photovoltaic panels in the field of power generation, hydrophobic materials have gradually received attention from researchers. Because EP-POSS (epoxy-based silsesquioxane) has many excellent properties, such as transparency, hydrophobicity, flame retardancy and weather resistance, it may be widely used in photovoltaic power generation boards in the future. Therefore, it is important to study the physical properties of EP-POSS. This article studies the physical properties of synthesized EP-POSS, such as the light transmittance, adhesion, flame retardancy, surface energy, and dielectric properties. The results prove that EP-POSS is a hydrophobic material that can be applied to photovoltaic panels. This work laid a theoretical foundation for the application of EP-POSS as a hydrophobic material to photovoltaic panels.


2021 ◽  
Vol 2 (3) ◽  
Author(s):  
Nagina Gulab Belali ◽  
Anis Y. Chaerunisaa ◽  
Taofik Rusdiana

Microcrystalline cellulose was isolated from rami (Boehmeria Nivea L. Gaud), and applied as disintegrant in tablets of dimenhydrinate, made by direct compression and wet granulation. The aim of this study is to produce dimenhydrinate tablets with Microcrystalline Cellulose Rami (MCC Rami) isolated from Rami (Boehmeria Nivea L. Gaud), as a disintegrant and assess the effect of MCC Rami and Granulation technique on physical properties of drug such as, disintegration time, drug release and dissolution. Formulations of dimenhydrinate 100mg tablets were prepared with a combination of mannitol and lactose as a filler and MCC Rami as disintegrant in a concentration of 10-20%. The formulas were directly compressed or were compressed into tablets after wet granulation. The mechanical properties, drug release, physical properties and effects of process parameters, methods of applying disintegrant in tablet formulas were examined. A significant difference in disintegration time of tablets that were produced by direct compression and wet granulation was seen, that can be attributed to the porous structure of granules that enhanced fast disintegration, which had eventually improved dissolution and drug release. F1 and F2 with MCC Rami and physical mixture of MCC Rami with crosspovidone as a disintegrant that were directly compressed disintegrated in 79 and 72 seconds respectively thats not a significant difference, however when MCC was applied in an intragranular way its disintegration time is 67 seconds. The results showed that the method of disintegrant application and press of tableting has a significant effect on drug release and dissolution.Keywords : Microcrystalline Cellulose, wet granulation, disintegrant, Boehmeria Nivea L. Gaud.


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