Tung Oil Research Articles

Recycling Non-Metallic Powder of Waste Printed Circuit Boards to Improve the Performance of Asphalt Material.

Non-metallic fractions (NMFs) from waste printed circuit boards (PCBs) are mostly composed of cured resin and fiber. In this study, NMF material from a PCB was ground into powder and added into matrix asphalt to produce PCB-NMF-modified asphalt. To improve the compatibility of PCB-NMF and asphalt, a compatibilizer consisting of tung oil and glycerol was also developed. The optimum compatibilizer content was determined to be 8% by weight of the PCB-NMF through a series of laboratory tests, including the softening point, penetration, ductility, and softening point difference (SPD). The micro-mechanism of NMF powder-modified asphalt was analyzed through Fourier transform infrared spectroscopy (FTIR) and a scanning electron microscope test (SEM). The performances of PCB-NMF-modified asphalt were evaluated by the dynamic shear rheology (DSR) test and the low-temperature bending beam rheometer (BBR) test. The optimum compatibilizer content was 8% by weight of the NMF powder and the optimum content of NMF powder was determined to be 30% by weight of the asphalt based on a comprehensive evaluation. The results show that PCB-NMF can significantly improve stiffness, rutting resistance, high-temperature stability, and temperature sensitivity of asphalt material at an appropriate content. The BBR tests revealed that PCB-NMF slightly weakened the cracking resistance of asphalt at low temperatures. The SEM test showed that the addition of a compatibilizer can increase the compatibility by making the NMF powder evenly dispersed. The FTIR test results implied that a chemical reaction may not have happened between PCB-NMF, compatibilizer, and the matrix asphalt. Overall, it is a promising and sustainable way to utilize PCB-NMF as a modifier for asphalt material and reduce electronic waste treatment at a low cost.

Bio-based and degradable vitrimer-graphene/graphene oxide composites with self-healing ability stimulated by heat, electricity and microwave as temperature and fire warning sensors

Bio-based polymer materials with multichannel self-healing ability as intelligent sensor have received significant attention. However, to date, study on bio-based vitrimer composites with multichannel self-healing ability as early temperature and fire warning sensors has never been reported. In this study, We prepared bio-based polyschiff vitrimers using vanillin and tung oil as raw materials, which possessed excellent self-healing and reprocessability. The electricity, heat and electromagnetic wave triggered self-healing of bio-based polyschiff vitrimers with graphene were achieved. A practicable strategy for fabricating bio-based via composite graphene oxide were developed as an efficient temperature warning sensor and fire warning sensor. These multifunctional bio-based polyschiff vitrimer composites developed could greatly promote its practical application in fire/high temperature prevention and protection applications in various critical fire risk and related perilous circumstances.

Bio-based epoxy vitrimer for recyclable and carbon fiber reinforced materials: Synthesis and structure-property relationship

Recycling or degradation of epoxy resins is difficult because of their covalent cross-linking structures, which causes resource crisis, environmental pollution, and resource waste. To address this challenge, we reported a recyclable and degradable epoxy vitrimer with dynamic ester bonds prepared from tung oil and diglycidyl ether of bisphenol-A via epoxy-acid-anhydride crosslinking system. Owing to the compact rigid six-member ring and the anhydride structure, the epoxy vitrimer shows high thermal stability, and excellent dynamic mechanical, and mechanical properties with tensile strength of 59.21 ± 1.02 MPa and glass transition temperature of 76.73 °C. The vitrimer network can achieve topological rearrangement via dynamic transesterification reactions with the addition of a Zn catalyst. Thus, the contrivable vitrimer exhibits excellent self-healing, shape memory, and physical recycling at elevated temperatures. Moreover, the epoxy vitrimer matrix has high joining strength with carbon fibers and can be used to prepare carbon-fiber-reinforced materials (CFRMs). The carbon fibers can be completely recycled from CFRMs through an ethanol-NaOH mixture solvent. This work can assist in preparation of degradable high-strength CFRMs using a recyclable tung-oil-based vitrimer matrix and provides a strategy for efficient recycling of carbon fibers from CFRMs.

Optimization of the Subcritical Butane Extraction of Tung Oil and Its Mechanism Analysis

Tung oil is an important dry grease. In order to overcome the deficiencies of traditional processes in oil production, the preparation of tung oil was carried out by the butane-subcritical method. A response surface optimization experiment was carried out based on Design-Expert software, and the best process parameters were obtained. The extraction temperature was 42.98 °C, the extraction time was 43.77 min, the particle size of the raw material was 38.88 mesh, and the oil yield of tung oil under this condition reached 67.437%. The fatty acid composition of tung oil was analyzed by Gas Chromatography-Mass Spectrometry (GC-MS): the content of α-oleostearic acid was 74.99%, linoleic acid content was 8.83%, oleic acid content was 7.42%, palmitic acid content was 2.02%, and stearic acid content was 4.35%. Through the analysis of the oil sample obtained, five indicators showed that the process of obtaining oil products met the requirements of the national standard. By simulating the subcritical n-butane/tung oil dissolution equilibrium model, the miscible dynamic equilibrium of tung oil in subcritical n-butane was studied at temperatures in the range of 35–50 °C and an equilibrium time of 40 min, and the kinetic equations of oil extraction at different temperatures were obtained, with a coefficient of determination (R2) greater than 0.99. The oil extraction rate was up to 67.12 ± 0.05% under optimal extraction conditions through the optimization of univariate and response surface experimental design. Using 1stOpt data processing software, the data of tung oil extraction rate at different times were fitted, and it was found that the Patricelli model accurately elucidated the kinetic process of tung oil extraction through subcritical n-butane, with R2 greater than 0.99.

Ca-Al LDH hybrid self-healing microcapsules for corrosion protection

Ca-Al LDH hybrid self-healing microcapsules were fabricated with tung oil as core and ethyl cellulose (EC) as wall via solvent evaporation method. The self-healing and chlorine adsorption properties of hybrid microcapsules in cement-based materials were investigated. The corrosion resistance performance of microcapsules in simulated chlorine-contaminated concrete pore solution (SCPS) was characterized by electrochemical probe technique. First-principles based on density functional theory was applied to study the hybrid mechanism of Ca-Al LDH on self-healing microcapsules. The results demonstrate that the nano-layered Ca-Al LDH within the hybrid wall provided additional nucleation sites for cement hydration. The chlorine adsorption capacity of cement paste doped with 3 wt% and 6 wt% microcapsules was 14.7% and 26.7% higher than that of pure cement paste in SCPS, respectively. Hybrid microcapsules improved the anticorrosion of steel bars in SCPS by coupling effect of self-healing and chlorine resistance. The formation of Ca-Al LDH@EC hybrid materials is an exothermic process with perfect binding stability. The chlorine adsorption property of microcapsules was improved by the interface charge redistribution of Ca-Al LDH@EC hybrid materials.

Preparation of bionanocomposite coatings from tung oil treated with a diamine and a triamine as alternatives for bisphenol A (BPA)

The aim of this study is to obtain new bio-based epoxide-nanocomposite coatings as an alternative to BPA for aluminum surfaces and compare new bio-based epoxide-amine coatings with their nanocomposite coating derivatives (graphene, CNT, and fullerene). Moreover, the comparison of epoxide-triamine nanocoating with epoxide-diamine nanocoatings are also given. As replacements for BPA, new bio-based epoxide-amine coatings and their nanocomposite coating derivatives including graphenes, carbon nanotubes (CNTs) and fullerenes were prepared with an epoxide tung oil (ETO) and Jeffamines (T403 and ED900) and, their thermal and mechanical properties have been compared, as well.In the first step, epoxy functionalized tung oil (ETO) was synthesized via the Diels-Alder reaction. Subsequently, these new epoxide-nanocomposite coatings were successfully prepared from the reaction of an epoxy functionalized tung oil (ETO) and two different polyether amines (Jeffamines T403 and ED900) as cross-linking agents, premixed with graphene, fullerene, and carbon nanotubes (CNTs) as nanoparticles. Four different curing temperatures were applied ranging from 25 °C to 150 °C. Epoxide-amine nanocomposites were prepared with a 1:1 epoxy: amine molar ratio and additive of 1% of carbon nanoparticles (graphenes, carbon nanotubes (CNTs) and fullerenes).Epoxide resin and the new nanocomposites were identified via 1H NMR, 13C NMR, IR, DSC and TGA analyses. Thermal stability of new coatings is observed up to 420 °C according to TGA analysis and these cured films displayed no glass transition points (Tgs) by DSC, except epoxide-diamine nanocoatings prepared with graphene (ETO-ED900-Graphene).The determination of the mechanical properties of the resulting nano coatings was accomplished by pendulum hardness, pencil hardness, cross-hatch adhesion, pull-off adhesion, impact and reverse impact resistance tests. New epoxide-amine nanocomposite coatings exhibit excellent thermal stability. All the cured films showed good adhesion, hardness, and impact resistance properties. Generally, epoxide-amine nanocomposite coatings displayed better thermal and mechanical properties in comparison to epoxide-amine coatings.They can be used as alternative coatings instead of BPA based epoxy resins in various coating systems in automobile, ships, aerospace, food and beverage industries due to their excellent thermal stability and good mechanical properties.

The Microencapsulation of Tung Oil with a Natural Hydrocolloid Emulsifier for Extrinsic Self-Healing Applications

In this work, tung oil was utilised as a catalyst-free self-healing agent, and an in-situ polymerization process was applied to encapsulate the tung oil core with a poly(urea-formaldehyde) (PUF) shell. The conventional poly(ethylene-alt-maleic-anhydride) (PEMA) polymer was compared to a more naturally abundant gelatin (GEL) emulsifier to compare the microcapsules’ barrier, morphological, thermal, and chemical properties, and the crystalline nature of the shell material. GEL emulsifiers produced microcapsules with a higher payload (96.5%), yield (28.9%), and encapsulation efficiency (61.7%) compared to PEMA (90.8%, 28.6% and 52.6%, respectively). Optical and electron microscopy imaging indicated a more uniform morphology for the GEL samples. The thermal decomposition measurements indicated that GEL decomposed to a value 7% lower than that of PEMA, which was suggested to be attributed to the much thinner shell materials that the GEL samples produced. An innovative and novel focused ion beam (FIB) milling method was exerted on the GEL sample, confirming the storage and release of the active tung oil material upon rupturing. The samples with GEL conveyed a higher healing efficiency of 91%, compared to PEMA’s 63%, and the GEL samples also conveyed higher levels of corrosion resistance.

Effects of Tung Oil Composite Regenerating Agent on Rheological Properties and Microstructures of Reclaimed Asphalt Binder.

The single light oil regenerating agent has certain limitations on the performance recovery of aged asphalt. In this study, tung oil, dioctyl phthalate (DOP), C9 petroleum resin, and organic montmorillonite (OMMT) were used to prepare the composite regenerating agent, and its optimal mix proportion was determined by the orthogonal experimental design. The rheological properties and anti-aging performance of reclaimed asphalt were studied by the dynamic shear rheometer (DSR) and bending beam rheometer (BBR); and the Fourier transform infrared (FTIR) spectrometer, gel permeation chromatography (GPC), and scanning electron microscope (SEM) were adopted to explore its microstructure, morphology, and mechanism of action. The results show that with the addition of tung oil composite regenerating agent, the rheological properties of aged asphalt can be effectively recovered, even better than that of base asphalt. By using the complex modulus aging index (CMAI) and phase angle aging index (PMAI) it is found that the anti-aging performance of reclaimed asphalt is better than that of base asphalt. With the optimal content of the tung oil composite regenerating agent, the contents of characteristic functional groups and macromolecular asphaltenes in the aged asphalt can be reduced, indicating that the composite regenerating agent is beneficial to the dispersion and dissolution of polar substances in the aged asphalt. After aging, a large number of wrinkles appear on the surface of the asphalt. However, the addition of the tung oil composite regenerating agent can make the asphalt surface smooth, which indicates that the tung oil composite regenerating agent can restore the microstructure and morphology of aged asphalt to a certain extent.

Preparation of Tung Oil Microcapsule and Its Effect on Wood Surface Coating.

Through the optimized preparation of tung oil microcapsules, five kinds of microcapsules containing different core material content were obtained to explore the influence of microcapsules on water-based paint film and the self-healing ability of microcapsules. The results showed that the microcapsules had good appearance, and the microcapsules were successfully prepared. The color difference in the paint film increased with the increase in microcapsule content, and the gloss decreased gradually. The mechanical test showed that adding microcapsules increased the toughness of the paint film to a certain extent, and the performance of the paint film was unchanged or better. The results showed that paint film with the core–wall ratio of 0.78:1 had the best performance and self-healing function when microcapsules were added.

The Effect of Complex Emulsifier on the Structure of Tung Oil and Phenolic Amides Containing Microcapsules and Its Anti-Fouling and Anti-Corrosion Performances

In this study, the urea-formaldehyde (UF)-tung oil solution of phenolic amide (PA) microcapsules to realize anti-fouling and anti-corrosion integration was synthesized by the in situ polymerization method. The compounds and structures were optimized by investigating six kinds of different emulsifiers. The results showed that high-core-content and narrow-particle-size-distribution microcapsules could be synthesized with sodium dodecyl benzene sulfonate (SDBS)/polyvinyl alcohol (PVA), and the core content of the microcapsules was 75 wt% at microcapsule sizes from 24.07 to 71.33 µm. The results of self-healing coatings showed that when the content of microcapsules in the coating exceeded 10 wt%, the healing agent released from the scratched surface could cover the naked metal effectively, which could pass a 7 day neutral salt spray test without rust at the scratched area. A sufficient dose anti-fouling agent can be provided to prevent diatoms and mussels from adhering. The present work shows that the complex emulsifier can better control the particle size distribution and microstructure of the microcapsules, and the admixture of the microcapsules into the resin epoxy coating can realize excellent anti-corrosion and anti-fouling functions.

Tung Oil Thermal Treatment Improves the Visual Effects of Moso Bamboo Materials.

Color is one of the most important characteristics of a material’s appearance, which affects the additional value of bamboo and psychological feelings of users. Previous studies have shown that the dimensional stability, mildew resistance and durability of bamboo were improved after tung oil thermal treatment. In this study, the effects of tung oil thermal treatment on bamboo color at different temperatures and durations of time were investigated. The results show that the lightness (L*) of bamboo decreased as the tung oil temperature or duration of time increased. The red–green coordinates (a*) and color saturation (C*) of bamboo were gradually increased as the tung oil temperature rose from 23 °C to 160 °C, while the a* and C* were gradually decreased when the temperature continued to rise from 160 °C to 200 °C. There was no significant difference in the yellow–blue coordinates (b*) of bamboo when the duration was prolonged from 0.5 h to 3 h with tung oil thermal treatment at 140 °C. Eye movement data show that the popularity of bamboo furniture was significantly improved at 23–100 °C and slightly improved at 160–180 °C with tung oil treatment. Therefore, tung oil thermal treatment plays a positive role in improving visual effects and additional value of bamboo.

The microstructure of Moso bamboo (Phyllostachys heterocycla) with tung oil thermal treatment

Summary Bamboo has a natural anisotropic porous structure. Previous studies have shown strong correlations between the properties and microstructure of bamboo. In this study, we examined the microstructure of Moso bamboo to reveal the mechanism of enhanced properties with tung oil thermal treatment. The morphological and chemical microstructure of Moso bamboo were characterized using scanning electron microscopy (SEM) and Raman spectroscopy. We found that tung oil film presented in the cell wall, cell lumen, and intercellular space after tung oil thermal treatment, which could decrease the water permeability in the cell wall. Additionally, the pits in vessels showed significant shrinkage in the short-axis orientation with thermal treatment in tung oil, and the shrinkage rate was nearly 50% with a temperature of tung oil over 140°C, which prevented the transportation of water through the pit. The content of tung oil in bamboo was reduced by more than 50% with an increase of tung oil temperature from 140°C to 200°C, which further supported the results of changed bamboo morphology. Altogether, these findings offer further support for the enhanced hydrophobic property of bamboo after tung oil thermal treatment.

Synthesis and characterization of layered double hydroxides hybrid microcapsules for anticorrosion via self-healing and chloride ion adsorption

Self-healing and corrosion resistance microcapsule (S/CMC) was fabricated by solvent evaporation method with tung oil (TO) as core, layered double hydroxides (LDH) as corrosion inhibitor and ethyl cellulose (EC) as wall. The average particle size of microcapsule increased with the increase of LDH content when LDH was less than 20 wt%. LDH component was present in the wall of S/CMC by surface loading, the chlorine adsorption performance of microcapsule in neutral environment was superior to that in alkaline environment. LDH was hybridized in EC to form stable wall structure. The LDH embedded in hybrid wall captured chloride ion by surface adsorption and ion exchange to improve the corrosion resistance of steel bar. This study provides a solution for the compatibility of anti-corrosion and self-healing technology, and provides a new perspective for the anti-corrosion application of microcapsule.

Investigation on the Painting Materials and Profile Structures Used in Ancient Chinese Folk Architectural Paintings by Multiple Analytical Methods

In order to understand the painting materials and profile structures used in the creation of Chinese ancient folk architectural paintings, the architectural paintings of the Bell and Drum Tower at Fushan Temple in Shaanxi Province of China was investigated. In this study, optical microscopy, Fourier transform infrared spectroscopy (FTIR), micro-Raman spectroscopy, scanning electron microscopy-energy-dispersive X-ray spectroscopy (SEM-EDS), and chemical experimental methods were used. The profile structures, and the elemental and chemical compositions of the pigments and binders in the ground layer of the 12 samples were determined. Results showed that the painting profile structures in both towers comprised of pigment layer, underpainting layer and ground layer, where no starch was found in the chalk ground layer. The pigment layer mainly comprised of iron oxide red, chalk, lapis lazuli, carbon black, green earth, and a dark green pigment that is formed by a combination of carbon black and green earth. To-date, the use of green earth pigment in Chinese architectural paintings was not found in Chinese related academic literature; hence, this study marked the first identification of green earth being used in the architectural paintings. Tung oil, commonly used in Chinese architectural paintings as a binder for pigment, was also identified in the samples. Results from this study will serve as an important reference for better scientific investigation methods on ancient Chinese folk painting materials.

Two preparation processes for anti-corrosion and self-healing epoxy coatings containing the poly (calcium alginate) microcapsules loaded with tung oil

Coatings provide a protective mechanism to help prevent metal corrosion. However, once a coating breaks down, its corrosion protection is greatly reduced. The incorporation of self-healing microcapsules in the coating can substantially improve the service life of metallic materials. For large-area engineering applications of microencapsulated, intelligent, self-healing anti-corrosion coatings, two different coating processes for poly (calcium alginate) microcapsules loaded with tung oil epoxy resin-based self-healing coatings (self-levelling and electrostatic spraying processes) are explored in this paper. In this paper, the poly (calcium alginate) microcapsules loaded with tung oil were synthesized by the emulsion gelation method. The microcapsules and its self-healing behaviour was analysed by SEM and FTIR. The anti-corrosion behaviour of the coatings were studied by polarization curves, EIS and SEM.The effects of different coating proportion schemes and coating processes on the corrosion resistance of the coatings are discussed. In conclusion, This work confirms the influence of coating preparation process on coating properties, which is of great significance for coating technology and application.

Comprehensive Analysis of the Surface Decoration Layer of Buddha Statues from Dazu Rock Carvings in China

The surface decoration layers of Samantabhadra Bodhisattva and Thousand Hand Guanyin from Dazu Rock Carvings were examined using digital microscopy, energy-dispersive spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and pyrolysis—gas chromatography/mass spectrometry using thermally assisted hydrolysis and methylation. Gypsum was present in the preparation layer, while the painted layer included lacquer sap (urushiol). The presence of heat-bodied tung oil and resin (benzoin resin) was also detected in some painted layers. Mineral pigments were found in the painted layers, including cinnabar, lead red, orpiment, litharge, and carbon. In addition, there was a layer of gold foil on the surface of the Thousand Hand Guanyin sample. The mass percentage of gold was 96.70%. The gold foil contained gold, silver, copper, and iron as a solid solution. This study provides a reference for the study and protection of cultural relic samples from grottoes.

Comparison of new bio-based epoxide-amine coatings with their nanocomposite coating derivatives (graphene, CNT, and fullerene) as replacements for BPA

As replacements for BPA, new bio-based epoxy-amine coatings and their nanocomposite coating derivatives including graphenes, carbon nanotubes (CNTs) and fullerenes were prepared for the first time, and their thermal and mechanical properties have been compared.A Diels Alder reaction was employed to prepare epoxy-functionalized tung oil (ETO). As a curing process, a primary diamine hardener (Jeffamine D2000) was used at four different temperatures ranging from 25 °C to 150 °C. Epoxide-amine nanocomposites were prepared with a 1:1 epoxy: amine molar ratio and additive of carbon nanoparticles (graphenes, carbon nanotubes (CNTs) and fullerenes).The cured coatings were analyzed by IR, DSC, TGA, and gel-content tests. Thermal stability of new coatings is observed up to 430 °C according to TGA analysis and these cured films displayed two glass transition points (Tgs) by DSC. While, of the three nano-composite incorporated systems, the graphene systems gave the maximum Tg in both phases, and the CNT-system exhibited a higher Ts and lowest weight loss with residues ranging up to 60% at 800 °C.The determination of the mechanical properties of the cured coatings was accomplished by pendulum hardness, pencil hardness, pull-off adhesion, cross-hatch adhesion, impact and reverse impact resistance tests. All the cured coatings have good mechanical properties in terms of hardness, cross-hatch adhesion and impact resistance. Generally, epoxide-amine nanocomposite coatings displayed better thermal and mechanical properties in comparison to epoxide-amine coatings.

Effect of surface modified nano-SiO2 particles on properties of TO@CA/SR self-healing anti-corrosion composite coating

At present, microcapsule technology can carry out intelligent self-healing for micro-cracks, so as to prolong the service life of the marine protective coating. However, after adding microcapsules, the properties of the coating itself, such as coating adhesion, distinctness of image, and mechanical properties, will be affected to a certain extent. In this paper, calcium alginate containing tung oil self-healing microcapsules (TO@CA) is dispersed in silicone rubber (SR) coating (TO@CA/SR) and the related properties of TO@CA/SR are tested. TO@CA/SR coating prepared with TO@CA average size of 63.84 μm and the content of 10% (T-63-10%) has the optimal performance. At the same time, TO@CA/SR composite coating is enhanced and modified by filling inorganic nano-SiO2 to realize self-healing microcracks without affecting the mechanical properties. TO@CA with modified nano-SiO2 of 2% (T/SiO2-2%) has the best self-healing, corrosion resistance, and mechanical properties. It shows that Nano-SiO2 forms a 3D connected network with SR and a double network structure coupled with the silicon chain network. The reversible bonding between nano-SiO2 and SR or nano-SiO2 dissipates the mechanical energy effectively under external force, thus improving the mechanical properties of coating. This study is of great significance for offset the impact of the microcapsules on the mechanical properties of the coating as much as possible, so as to ensure good stability of the self-healing coating.

Synthesis and characterization of tung oil-based UV curable for three-dimensional printing resins.

Using tung oil as the raw material, a new bio-based prepolymer was successfully synthesized by reacting with acrylic-modified rosin (β-acryloyl nutrient ethyl) ester (ARA)/acrylic-2-hydroxyethyl ester (HEA) followed by the use of the above composite material as the matrix and then reacting with the active diluent (2-HEMA, TPGDA) and the photoinitiator TPO and Irgacure1173 to successfully synthesize a new type of bio-based prepolymer-acrylate-epoxy tung oil polypolymer (AETP). The tung oil monomer before and after the epoxy formation was compared by proton NMR spectroscopy, and the chemical structure of AETP was analyzed by Fourier transform spectroscopy. Tung oil has an acid value of 1.5 mg KOH per g, an epoxy value of 5.38%, an iodine value of 11.28 g/100 g, and a refractive index of n25 = 1.475. Composite-based 3D printing resins (like AETP) were cured using digital light treatment, while some samples were also post-treated via ultraviolet (UV) light treatment. The AETP-based 3D printing resin has excellent thermal and mechanical properties, and the viscosity of its system is 313 mPa s; exposure time 4.5 s; the tensile strength, flexural strength and flexural modulus were 62 MPA, 63.84 MPa and 916.708 MPa, respectively; Shore hardness was 80 HD and shrinkage was 4.00%. The good performance of the AETP-based 3D printing resin is attributed to the rigidity of their tightly crosslinked structure. This study pioneered a method for producing photoactive acrylates (e.g., tung oil-based acrylate oligomer resins) from renewable, low-cost biomass for light-curing 3D printing.

Tribological and mechanical properties of wood dowel rotation welding with different additives

Wood friction welding is a green and pollution-free wood processing technology. Research on wood friction welding mainly focuses on the influence of wood type, welding process, and welding interface additives on welding interface strength. However, studies on the tribological properties of wood friction welded interface and its effect on the strength of the welded interface are few. In this article, chemical additives in wood were added to the interface. The frictional force, normal force, microstructure, and chemical composition of the welding interface, and their effects on the strength of the welding interface were studied. In the rotating friction welding of wood, frictional force increased gradually with friction welding. Approximately 2 s after welding, the frictional force achieved a stable state. Normal force increased and then gradually decreased. No considerable changes in frictional force and interface strength were observed and interface strength increased with normal force. The interface strength of glucose and rosin increased, whereas that of N2 protection showed little change. The interface strength of tung oil, cellulose, and guaiac decreased. This study provides a basic reference for the further industrial application of wood friction welding technology.