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25 protocols using titanium butoxide

1

Polymer Synthesis and Characterization

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Adipic acid (>99%), succinic acid (>99%), dodecanedioic acid (>99%), dimethyl adipate (>99%), titanium butoxide (>99%), ethylene glycol (>99.8), PCL homopolymers with molar masses of 14,000 and 80,000 g/mol were purchased from Sigma Aldrich (Steinheim, Germany). All the other products and reagents were used without further purification.
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2

Sago Starch and Hide Powder Characterization

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Sago starch was purchased from a local departmental store in Chennai and ground into fine powder using a mixer. Hide powder was prepared from the cowhide trimming wastes collected from a local tannery at Chennai. Acetone, methanol, sodium carbonate and ethylene glycol were procured from Thermo Fisher Scientific and used as received without further purification. Sodium periodate, titanium butoxide, Erythrosin-B and Bouin’s solution were purchased from Sigma-Aldrich. Isopropanol, nitric acid and diethyl ether were procured from SD Fine Chemicals. Albendazole oral suspension IP and silver nitrate gel were acquired from a local pharmacy, Chennai.
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3

Synthesis of TiO2 Nanocomposites

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TiO2 rutile (99%) was purchased from Iolitec. Iron(III) nitrate nonahydrate (≥ 98%; Fe(NO3)3·9H2O), titanium butoxide (97%; Ti(OCH2CH2CH2CH3)4), TiO2 anatase (> 99%) and citric acid (≥ 99.5%; HOC(COOH)(CH2COOH)2) were supplied from Sigma-Aldrich. Absolute Ethanol (CH3CH2OH) was purchase from VWR. Ultrapure water was obtained from a Milli-Q water system (resistivity of 18.2 MΩ cm, at 25 °C).
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4

Solvothermal Synthesis of Titanium Fluoride

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Titanium butoxide (TNBT) or Ti(OBu)4 (Bu = CH2CH2CH2CH3) (Molar mass = 340.32 g/mol) (97%), sodium fluoride (NaF) (99%), hydrofluoric acid [HF] (40 wt%), and anhydrous ethanol (99.8%) were purchased from Sigma-Aldrich. All chemicals were used directly without further processing. Additionally, Teflon-lined stainless-steel autoclave (Parr Instrument Co., Moline, IL, USA) with a capacity of 45 mL was used.
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5

Enzymatic Polymerization of Lactide

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Adipic acid (AdA) (purity: >99.5%), poly(phosphoric acid) (PPA) and 1,3-propanediol (1,3-PD) (purity: >99.6%) were purchased from Fluka (Steinheim, Germany). Titanium butoxide (purity: >97.0%), Ti(OBu)4) and tin(II) 2-ethylhexanoate (Sn(Oct)2) were used as catalysts, l-Lactide (LA), (3S)-cis-3,6-Dimethyl-1,4-dioxane-2,5-dione (98%) and poly(vinyl alcohol) (PVA), Mw 31,000–50,000 Da (87%–89% hydrolyzed) were purchased from Sigma Aldrich Chemical Co (Steinheim, Germany). Rhizopus oryzae and Pseudomonas cepacia were purchased from BioChemika (Steinheim, Germany). Naltrexone base (99.9%) was kindly donated by Pharmathen S.A. (Athens, Greece). All other reagents and solvents used for the analytical methods were of analytical grade.
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6

Synthesis of TiO₂ Nanosheets with Tunable Facets

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TiO2 nanosheets were synthesized, as previously described [17 (link)]. Briefly, ammonium hexafluorotitanate and titanium butoxide (Sigma-Aldrich Co., St Louis, MO, USA, 97%) were used as starting agents. ammonium hexafluorotitanate was dissolved in 5 M HCl and then mixed with titanium butoxide. To control the {001}/{101} facet ratio, titanium/fluorine molar ratio in the mixture was set as 1.0 (NS1.0), 1.2 (NS1.2), 1.5 (NS1.5), 1.8 (NS1.8), and 2.0 (NS2.0). The solution was placed in a high-pressure reaction vessel and allowed to react at 180 °C for 6 h. After hydrothermal synthesis, precipitates were washed thrice with distilled water, once with methanol, and eventually dispersed in distilled water.
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7

Titanium Dioxide Coated Cotton and Polypropylene

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Cellulose-based cotton (166 ± 5 g m−2) and polypropylene non-woven (40 ± 4 g m−2) fabrics were purchase from a local market in Santa Catarina (Brazil). Titanium butoxide was provided by Sigma – Aldrich (97%). The acetic acid (99.5%) and ethanol (99.8%) were obtained from Lafan (Brazil) and Neon (Brazil), respectively. The fabrics and reagents were used without prior treatment/purification.
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8

Synthesis of CD@TiO2 Nanohybrid and Glycerol-Based Hyperbranched Epoxy

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Citric
acid (Merck, Germany),
glycerol (Merck, Germany), poly(ethylene glycol) (PEG-200, Mn = 200 g/mol, Merck, Mumbai), and 2,2-bis(hydroxymethyl)propionic
acid (bis-MPA, Sigma-Aldrich, Germany) were used after drying in a
vacuum oven. Titanium butoxide (Sigma-Aldrich, Germany) and poly(amido
amine) hardener (HY840, Ciba Geigy, Mumbai; amine value, 5–7
equiv/kg) were used as received. All other chemicals used in this
study were of reagent grade and used without further purification.
CD@TiO2 nanohybrid was prepared by the same hydrothermal
method as reported earlier,20 (link) and the basic
information about CD and CD@TiO2 is provided in the Supporting Information (SI). The glycerol-based
hyperbranched epoxy was obtained by the reported method, and its important
characteristics are provided in the Supporting Information (SI).
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9

Synthesis of Titanium-Doped Dysprosium Oxide

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Titanium
butoxide, dysprosium(III)
nitrate pentahydrate, glacial acetic acid, absolute ethanol, HCl,
NaOH, and rhodamine B (RhB) dye were all obtained from Sigma-Aldrich
and used without further treatment.
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10

Synthesis of Functionalized Methacrylates

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In a typical reaction butyl methacrylate (Sigma-Aldrich) (14 g, 98.5 mmol) was introduced into a 50 ml vessel along with the required quantity of individual target alcohols [cyclododecanol (VWR) (13 g, 70.5 mmol), trans-3,7-dimethyl-2,6-octadien-1-ol (10.8 g, 70.3 mmol) 5-methyl-2-(1-methylethyl) cyclohexanol (11.2 g, 71.6 mmol) or 1-dodecanol (sigma-aldrich) (13.1 g, 70.3 mmol)] to form a 7:5 molar ratio. Then titanium butoxide (Sigma-Aldrich) catalyst at a concentration of 1% by molar ratio (relative to butyl methacrylate) and 1000 ppm of 4-methoxyphenol (Sigma-Aldrich) inhibitor were added. The reaction was heated to 160 °C and stirred for 45 min at which point a nitrogen gas sparge was introduced to increase the rate of removal of butanol by-product. butyl methacrylate has been chosen as the methacrylate precursor for these reactions to allow these elevated temperatures to drive the reaction kinetics and equilibrium toward full completion in a short timescale. The reaction was sampled every 15 min and these samples were quenched in a freezer prior to NMR analysis.
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