Improvement of the Performance of Plantation Wood by Grafting Water-Soluble Vinyl Monomers onto Cell Walls

Abstract

The accomplishment of lightweight reinforcement of wood through an environmentally friendly approach has been seen as a tough nut to crack for a long time. In this study, a novel method inserting water-soluble vinyl monomers into wood cell walls followed by in situ polymerization was proposed. The distributions of the modifiers in the wood cell walls and the graft mechanism between water-soluble vinyl monomers and wood cell wall components were thoroughly investigated. Results indicated that the water-soluble vinyl monomers could effectively permeate into the wood cell walls and connected with the hydroxyl groups of the lignin and polysaccharides via covalent bonds. The lumen of the wood remained unfilled during the modification process, and just a 40% weight gain was achieved. However, a 68.37% antiswelling efficiency was achieved after a water-soluble vinyl monomer treatment under the optimized condition (when 20 wt % of NMA was coadded). The modulus of rupture and modulus of elasticity of the corresponding material increased 20.2% and 38.0%, respectively, compared with those of the untreated one.

Characterization of Microstructure, Chemical, and Physical Properties of Delignified and Densified Poplar Wood

“…Wood is a natural, renewable, and abundant structural material, which has been widely used in residential construction, bridges, and furniture [ 1 ]. Increasing wood utilization through conservation not only can reduce the carbon footprint but promote sustainable and healthy forest management.…”

Lignin-Based Hollow Nanoparticles for Controlled Drug Delivery: Grafting Preparation Using β-Cyclodextrin/Enzymatic-Hydrolysis Lignin

“…Fourier transform infrared spectra (Thermo Fisher Nicolet iS10, Waltham, MA, USA) and 1H NMR spectra (Bruker Avance III 500 MHz, Billerica, MA, USA) were determined and exhibited the modification of EHL. In Figure 1C, the 1H NMR spectrum of CD-EHL represents the hydrogen protons in a benzene ring of lignin (6.76–7.72 ppm), methoxyl protons (3.84 ppm), and aliphatic side chains related to a benzene ring (2.6–0.7 ppm) [19], as well as signal for β-CD protons (3.42–3.19 and 4.86–4.42 ppm) [20,21]. More importantly, a secondary amine signal is apparent at 8.22 ppm, indicating a substitution reaction between β-CD and EHL-containing amino.…”

Economically Feasible Wood Biopreservation Platform in Lannea coromandelica (Houtt.) Merr. Against Wood Rotting Fungus Through Bio-Prospecting Weed Extracts

“…Wood is one of the most important and versatile natural resources of humanity, assisting various nations in achieving sustainable development and improving technology and welfare (Daly-Hassen et al, 2014;Verhaegen et al, 2014). The strong mechanical properties of wood and its ease of processing and satisfying aesthetic appearance have not only led to its widespread use in tools, furniture, buildings, and decorations (Qiu et al, 2018) but also in the emerging fields of transparent materials (Zhu et al, 2016, Yu et al, 2017, water clean-up and extraction (Liu et al, 2017;Zhu et al, 2017;Wang et al, 2019), energy storage (Yang et al, 2018), stimuli-responsive materials (Li et al, 2018), and electronic devices (Chen et al, 2018). Since wood, underexposed environmental conditions, is vulnerable to deterioration caused by various organisms and abiotic influences, it must have high natural durability for these applications.…”