poly lactic acid bio composites based on natural fibres

... of rPP/DVB/AA/BP bio- composite in BP 150 mesh (a) before biodegradation and (b) after biodegradation for four months Synthesis of Degradable Bio- Composites 114 CONCLUSION The bio- composite processed ... weight reduction after biodegradation for four months The results of the weight changing of biocomposites after biodegradation can be seen in Figure All of the synthesized bio- composites were ... 150+ DVB 2.5 1.5 0.5 -0.5 Bio- composites Figure 7: Weight loss percentage curve of rPP/AA/BP and rPP/DVB/AA/BP bio- composites in optimum condition after biodegradation bio- composite in particle...

Ngày tải lên: 07/08/2014, 14:20

... heatsetting on tensile resilience RT % on knitted Ingeo Poly (lactic acid) (PLA) fabric Conclusion The effect of time of heatsetting on tensile properties of knitted Ingeo™ Poly (lactic acid) (PLA) ... process for the production of PLA polymer The process begins with the continuous condensation of lactic acid to form a low molecular weight PLA pre polymer [12, 15] which is converted to a mixture ... heatsetting on the linearity of load extension in warp direction of knitted Ingeo™ Poly (lactic acid) fabric Figure Effect of time of heatsetting on the linearity of load extension in weft direction of...

Ngày tải lên: 05/09/2013, 16:10

... 16-QAM constellation (b) Signal constellation at the channel output (H = 1, BO = 2.55 dB) (c) Signal constellation at the channel output (H = [1 0.1]t , BO = 2.55 dB) (d) Signal constellation at ... TWT AM/AM conversion (Figure 6a), and the TWT AM/PM conversion (Figure 6b) Note that, concerning the identification of the channel filter by Q, the latter has converged to a scaled version of H The ... the satellite channel on the rectangular 16-QAM transmitted constellation The transmitted constellation is illustrated in Figure 3a Figure 3b shows the output constellation when filter H = 1, that...

Ngày tải lên: 23/06/2014, 01:20

... mesophase formation based on the electrostatic interaction and hydrogen-bonding interactions, respectively The synthesis, stabilization, modification, application, structure characterization, mechanistic ... in the lowest electronic excited state In confirmation of the TICT thesis, the twisted conformation was lower by kJ/mol in energy than the 0° torsional conformation in acetonitrile For DCM, it ... this section, we will focus on the following four kinds of routes: 1) co-condensation method; 2) wetness impregnation and ion exchanging; 3) covalent bonding; and 4) surface modification method,...

Ngày tải lên: 13/11/2014, 11:17

... PLLA poly( L -lactic acid) or poly( L-lactide) PDLA poly( D -lactic acid) or poly( D-lactide) DFT density functional theory DFPT density functional perturbation theory PBA poly( butyl acrylate) POSS polyhedral ... this type of ordered conformation also occurs among synthetic linear polyhydrocarbon polymers and biopolymers where van der Waals interactions other than conventional hydrogen bonding must be very ... H  Figure 1.4.Torsion angles around PLA polymer backbone bonds O-C, C-C and C-O 1.2 Poly( lactic acid) Polymorphs and Stereocomplex Polymer polymorphism, i.e more than one crystalline structure...

Ngày tải lên: 09/09/2015, 18:56

... solutes to be separated along the unit, namely by enforcing weak adsorption conditions in sections and and strong adsorption conditions in sections and By far, three operation modes, i.e., temperature ... presented in chapter 190 7.5 Conclusions 191 v Conclusions and recommendations 8.1 Conclusions 193 193 8.1.1 Optimization of hybrid SMBR systems for production of high concentrated fructose syrup ... Multi-objective optimization of Modified Configuration (MC2) 99 4.5 Performance comparison at optimal operating conditions 101 4.6 Conclusions 105 Determination of the competitive adsorption isotherm of...

Ngày tải lên: 15/09/2015, 17:10

... emission tomography Poly (lactic acid) Poly (lactic acid) -D-alpha-tocopheryl polyethylene glycol 1000 succinate Poly (lactic acid) -poly (ethylene glycol) Poly (lactic co-glycolic acid) Quantum dot ... solution (Gao XH et al., 2002) 27 In addition to proteins, biodegradable polymers such as poly (lactic acid) (PLA) and poly( lactic- co-glycolic acid) (PLGA) and various biodegradable copolymers ... as poly( lactic acid) -poly (ethylene glycol) (PLEA) copolymer and poly (lactide acid) -dα-tocopheryl polyethylene glycol 1000 succinate (PLA-TPGS) copolymer have been used as shielding groups One...

Ngày tải lên: 13/10/2015, 15:54

... this optical biosensor at the sub cellular level from DNA and semiconductor graphene ribbons It is proved that the AGNR-DNA based biosensors are more sensitive than CNT-DNA based biosensors in ... of the exciton binding energy (16) pH-DEPENDENCE OF THE OPTICAL BIO- SENSOR 85 IV CONCLUSIONS This new combining structure of DNA and SGR is really interesting The biosensor based on DNA and GNR ... pH-dependence of solution around SGR are shown by using data analysis method We have shown the range of parameters for workable conditions of this biosensor was indicated that the solution should have...

Ngày tải lên: 31/10/2015, 10:42

... synthetic fibres, particularly carbon, glass and aramid fibres, natural fibres such as flax, jute, coconut fibre (coir), hemp and bamboo have received a growing interest for application in polymer composites ... discussion on the fibre-matrix interface adhesion and some fibre treatments for improvement of the interface quality in natural fibre composites 1.2.1 Natural fibres Figure 1-2 Overview of natural fibres ... Introduction Natural fibres generally are fibres which are not synthesised but obtained from nature using different fibre extraction processes Natural fibres can be divided in subgroups based on their...

Ngày tải lên: 13/05/2016, 16:25

... PEG : Poly( ethylene glycol) PEUU : Poly( ester urethane)urea PGA : Poly( glycolic acid) PLGA : Poly( lactic- co-glycolic acid) PLLA : Poly( L -lactic acid) PMMA : Poly( methylmethacrylate) pNIPAM : Poly( N-isopropylacrylamide) ... knowledge related to native bone (bone structure, bone cells, bone formation and bone repair), bone grafts and available bone graft substitutes, stem cell response to biomaterial topography, the ... presentation 13 N T H Luong, S Liao, C K Chan and S Ramakrishna, Electrospun Dexamethasone-loaded Poly- L -lactic acid nanofibers for bone graft materials Proceedings of International Conference...

Ngày tải lên: 09/09/2015, 10:07

... introduction, the system should act a ~ a natural language front-end for a 117 THE CONSTRUCTION PROCESS RULE I COND: (CURFILL REF or CURRENT NIL or CURRENT REL) and NEXT = NOUN CRLINK CONN REL FILL CONN ... other condi tions evaluate to false), its action part is exe cured An action consists in the construction of new nodes, in their filling up with particular val ues (normally depending on the ... expensive "natural" modification; a set of these modifications is predefined and only when none of them is applicable a real backup is performed: in most cases this situation corresponds to a...

Ngày tải lên: 18/03/2014, 02:20

... Whilst naturally-derived biodegradable polymers are usually mimicked the key elements of normal tissue [22] Poly( lactic- co-glycolic acid) (PLGA) are bioresorbable and biocompatible synthetic polymer, ... YK, Yoon SJ, Rhee JM, Kim MS, Lee HB, Khang G: Correlation of proliferation, morphology and biological responses of fibroblasts on LDPE with different surface wettability J Biomater Sci Polym ... as demineralised bone particles [28] Incorporation of bioactive molecules on PLGA surface is believed to mediate cells behavior, e.g proliferation, differentiation and function [26-28] To minimize...

Ngày tải lên: 20/06/2014, 01:20

... condition were visualized under a scanning electron microscope Therefore, after the 24 h incubation period, coupons were dehydrated by a 15 immersion in solutions with increasing concentrations ... surfaces in water In biological systems, hydrophobic interactions are the strongest long-range non-covalent interactions and are considered a determining factor in microbial adhesion to surfaces (Sanin ... http://www.articlesbase.com/diseases-and-conditionsarticles/adhesive-capabilities-of-staphylococcus-aureus-and-pseudomonasaeruginosa-isolated-from-tears-of-hivaids-patients-to-soft-contact-lenses3854426.html Alves NM, Shi J, Oramas E, Santos JL, Tomás H, Mano JF (2009) Bioinspired superhydrophobic poly( L -lactic acid) surfaces control bone marrow derived cells adhesion...

Ngày tải lên: 20/06/2014, 23:20

... this observation supports the postulate above that O2 evolution consumes a larger fraction of the charge when deposition occurs from an electrolyte with high ligninsulfonate concentrations Further ... proportional to the square root of the rotation rate of the disc, confirming mass transport control In both solutions, a ‘nucleation loop’ is clearly seen and the potential where the current is zero on ... methanesulfonic acid (Aldrich) and lead carbonate (BDH) and where appropriate sodium ligninsulfonate (Aldrich), polyethylene glycol, molecular weight 200 (Lancaster Synthesis), nickel carbonate (BDH),...

Ngày tải lên: 05/07/2014, 20:21

... conductivity in ionic polymers, various ionically conducting polymers or polymer electrolytes have been prepared for a wide range of applications The most interesting property of conducting polymers ... 7.26071 Å 3.5 Electrical Conductivity The polymer backbone in the PANI-ESP conducting polymers consists of a π-conjugated chain The overlap of π-electrons is called conjugation because it leads to ... electrons are not available to participate in the conduction process.1 In principle, an oxidation or reduction reaction is often accompanied by the addition or removal of electrons Therefore, a polymer...

Ngày tải lên: 10/07/2014, 09:31

... conductivity in ionic polymers, various ionically conducting polymers or polymer electrolytes have been prepared for a wide range of applications The most interesting property of conducting polymers ... 7.26071 Å 3.5 Electrical Conductivity The polymer backbone in the PANI-ESP conducting polymers consists of a π-conjugated chain The overlap of π-electrons is called conjugation because it leads to ... electrons are not available to participate in the conduction process.1 In principle, an oxidation or reduction reaction is often accompanied by the addition or removal of electrons Therefore, a polymer...

Ngày tải lên: 07/08/2014, 14:20

... the bicarbonate concentration using the Henderson–Hasselbalch equation The carbon dioxide solubility coefficient was 0.0307 The apparent overall dissociation constant for carbonic acid was 6.105 ... Phosphate Anion gap (mEq/l)*,** Apparent strong ion difference (mEq/l)** Effective strong ion difference Strong ion gap (mEq/l)*,** (mEq/l)*,** All data presented as mean ± standard deviation aMeasured ... ARF group Matched controls ICU controls Anionic and cationic charges in the three study groups The mean apparent strong ion difference (SIDa) and the mean effective strong ion difference (SIDe...

Ngày tải lên: 12/08/2014, 19:22

... (Mononuclear Phagocyte System) NC Nghiên cứu PACA poly( alkylcyanoacrylat) PDI Chỉ ố đa phân tán PEG Polyethylenglycol PEO Polyethylen oxyd PLA Polylactic acid PLGA Poly( lactic- co-glycolic) acid ... CS, vừa đảm bảo nhóm NH2 C C H P G điện ly thành ion Giá trị pKa acid lactic oligom poly- lactic acid 3,1, acid glycolic oligom poly- glycolic acid 3,83 [48] Giá trị p a nhóm 29 amin bậc CS khoảng ... au polym cation C hấp phụ lên bề mặt tiểu phân nano PLGA chủ yếu lực hút tĩnh điện với tiểu phân P G mang điện âm Giá trị pKa 35 acid lactic oligom poly- lactic acid 3,1, acid glycolic oligom polyglycolic...

Ngày tải lên: 25/07/2015, 00:46

... quang (acid L-polylactic) dạng racemic không hoạt quang (D, L -acid polylactic) PLGA copolyme điều chế từ acid L-polylactic polyglycolide dạng kết tinh, thay đồng phân D,L -acid polylactic polyglycolide ... dụng poly (lactic- co-glycolic) acid hyaluronic acid tiến hành với mục tiêu sau: Xây dựng công thức bào chế tiểu phân nano artesunat - poly( lactic – co-glycolic) acid (PLGA), bao với hyaluronic acid ... kết tinh polyme PLGA, hay nói cách khác, phụ thuộc vào loại tỷ lệ mol thành phần polyme (lactic glycolide) chuỗi copolyme Acid lactic kỵ nước so với acid glycolic và, đó, PLGA có tỉ lệ lactic cao...

Ngày tải lên: 25/07/2015, 00:46

... sulfonic acid materials generally includes functionalization of porous silica, carbon and polymer materials with propylsulfonic acid, arenesulfonic acid, perfluorosulfonic acid and sulfonic acid ... of Contents 3.3 Characterization 53 3.4 Evaluation of conversion for acetic acid 58 Chapter Sulfonated Mesoporous Carbons and Carbon-silica Composites 59 4.1 Introduction ... adsorption-desorption isotherms of mesoporous carbons before sulfonation(A), BJH-PSD curves of mesoporous carbons before sulfonation(B), nitrogen adsorption-desorption isotherms of mesoporous carbons...

Ngày tải lên: 14/09/2015, 08:39