Performance Engineering Research Articles

Physical properties of alkali activated aluminosilicates based on low-reactivity ceramics in room temperature conditions

Alkali activated aluminosilicates (AAA), or geopolymers, are widely studied materials because they are supposed to become a more sustainable alternative to materials based on Portland cement, such is especially concrete. AAA materials are generally produced by activation of an aluminosilicate precursor by an alkaline solution – usually solution of sodium silicate and sodium hydroxide. The capability of the prepared material to be used as construction material is commonly evaluated by means of its compressive strength. The present paper aims to broaden the AAA materials characterization to other physical properties such are porosity and thermal conductivity, since these measures are closely related to the engineering performance of the material. The waste ceramic dust was used as precursor while the solution of potassium silicate was an activator. The relationships between the above listed physical properties and obviously on the material composition were searched.

Water-energy-food linkages in community smallholder irrigation schemes: Center pivot irrigation in Rwanda

Water, energy, and food are linked in intricate ways in irrigated agriculture and understanding the interplay of these components is crucial for sustainable and profitable crop production, particularly in smallholder setting such as in sub-Saharan Africa. This study evaluates water-energy-food linkages, engineering and economic performance, irrigation decision making, and challenges faced around water management in a community-based mechanized irrigation scheme in Rwanda. The research is the first to analyze such as scheme, which uses technology typically used by large farmers in a smallholder setting. The study investigates the variation in water requirements and the relationship and impacts of this variability on crop yield for the crops grown in the scheme: maize, French beans, and dry beans. Observed irrigation decision-making analyses demonstrate a lack of irrigation planning during growth stages and significant field-to-field variation in irrigation; this is linked to yield reduction in major crops. Results suggest that farmers irrigated only 31% of modeled irrigation water in dry beans and 27% of modeled irrigation water in maize. An econometric model assessment is used to understand the relationship between yield and energy inputs. A related policy analysis considers the impacts of changes in crop and water management on field-level profits and system-level financial sustainability. This study has implications for understanding irrigation policies in the context of the water-energy-food nexus and decision-making in Sub-Saharan Africa.

Using perforated cenospheres to improve the engineering performance of limestone-calcined clay-cement (LC3) high performance concrete: Autogenous shrinkage, strength, and microstructure

Limestone-calcined clay-cement (LC3) is a novel ternary cementitious material. Cenospheres (CS) are a type of fly ash with a smooth surface and hollow center. The chemical etching of the CS creates perforated CS (PCS) with pores through with water can be transported to achieve internal curing of LC3. In this study, experiments were performed to determine the effect of PCS on the performance of LC3 high-performance concrete. The dosage of PCS was 4% and 8%, and the dosage of CS was 8%. The autogenous shrinkage of samples with 4% and 8% PCS was reduced by 31.1% and 61.8%, respectively. This means PCS reduces the autogenous shrinkage of LC3. The strength of the sample with 4% PCS increased by 7.01 and 12.06 MPa compared with the control sample at 7 and 28 days of age, respectively, due to the internal curing of PCS and its volcanic ash This achieves the dual impact of low shrinkage and high strength. Furthermore, the experimental X-ray diffraction and Fourier transform infrared spectroscopy results showed that PCS can undergo pozzolanic reactions with calcium hydroxide. In addition, the heat of hydration and thermogravimetric analysis experiments showed that the internal curing of PCS promotes the hydration of LC3. Scanning electron microscopy images showed that the sample with 8% PCS had a high-quality dense bond between the PCS and matrix. Therefore, PCS can be used as a reactive internal curing material and the microscopic reaction of PCS can improve the macroscopic properties of concrete.

Acid‐Assisted Toughening Aramid Aerogel Monoliths with Ultralow Thermal Conductivity and Superior Tensile Toughness

AbstractResisting extreme loading and thermal ablation encountered by aerospace devices demands for high performance engineering materials. Aerogels have achieved satisfactory thermal insulation but the intrinsic brittleness of porous skeletons fail to ensure their normal operation under severe stress fields. Herein, aramid nanofibers (ANFs) are processed into tough 3D aerogel monoliths via a multi‐scale toughening strategy, involving unidirectional freeze‐casting‐enabled microstructure orientation and acid‐assisted nanofiber cross‐linking. Scalable production of ANFs aerogels is realized through fast air‐drying without excessive energy consumption. The aligned sheets in ANFs aerogels enable extreme thermal conductivity of 15.8 mW m−1 K−1, superinsulation from −130 to 300 °C, and durable combustion protection for 20 min. Particularly, highly aggregated nanofibers assemble into dense ANFs skeletons, endowing the tough aerogels with superior specific tensile strength (89 MPa cm3 g−1), ultra‐high toughness (1.3 MJ m−3), and impressive fracture energy (7.36 kJ m−2). Such mechanical properties are highly resistant to harsh environments, including water erosion (7 days) and high temperature baking (30 days). Moreover, ANFs aerogels exhibit two to three times more energy dissipation than commercial foams against ballistic impact at 140 m s−1. This integrated mechanical and thermal robustness may pioneer the potential application in impact‐thermal coupled safeguard for aerogel materials.

Advanced Composite Materials for Structure Strengthening and Resilience Improvement

Advanced composite materials have excellent performance and broad engineering application prospects, and have received widespread attention in recent years. Advanced composite materials can mainly be divided into fiber-reinforced composite materials, laminated composite materials, matrix composite materials, and other composite materials. This article provides a comprehensive overview of the types and characteristics of advanced composite materials, and provides a comprehensive evaluation of the latest research on structural strengthening and resilience improvement in advanced composite materials from the perspectives of new methods, modeling optimization, and practical applications. In the field of fiber-reinforced composite materials, the hybrid technology of carbon fiber and glass fiber can achieve dual advantages in combining the two materials. The maximum increase in mechanical properties of multilayer sandwich RH plate by hybrid technology is 435.4% (tensile strength), 149.2% (flexural strength), and 110.7~114.2% (shear strength), respectively. In the field of laminated composite materials, different mechanical properties of laminated composite materials can be obtained by changing the deposition sequence. In the field of matrix composites, nano copper oxide particles prepared by nanotechnology can increase the hardness and tensile strength of the metal matrix material by 77% and 78%, respectively. In the field of other composite materials, viscoelastic materials and magnetorheological variants have received widespread attention. The development of composite materials benefits from the promotion of new methods and technologies, but there are still problems such as complex preparation, high cost, and unstable performance. Considering the characteristics, application requirements, cost, complexity, and performance of different types of composite materials, further improvements and innovations are needed in modeling and optimization to better meet practical engineering needs, such as the application of advanced composite materials in civil engineering, ships, automobiles, batteries, and other fields.

Effect of calcium-silicate-hydrate (C-S-H) nano-crystals on the hydration rate and early strength of microwave-absorbing cement mortar containing magnetite (Fe3O4) powder

Fe3O4 powder (powdered magnetite) is a favorable absorbing material, which can effectively improve the microwave absorption and heating properties of the prepared cement mortar in engineering applications. However, its addition may have a certain degree of deterioration effect on the engineering performance of cement mortar. To reduce this effect, the calcium-silicate-hydrate nano-crystals (CSHN) were added to the mortar. The early hydration rate of Fe3O4 cement mortar (FC) was studied. Moreover, the early mechanical properties, physical and chemical properties, and pore structures of FC were investigated to characterize the effect of CSHN on the early strength evolution characteristics of FC from macroscopic and microscopic scales. In addition, the microwave heating efficiency and heat transfer ability of the FC were determined. The results showed that the CSHN could effectively increase the early hydration rate of the cement matrix to produce more hydration products, which could effectively improve the mechanical strength of FC. Within 1d, the compressive and flexural strength of FC could be improved by 99.4% and 101.4%, respectively. Meanwhile, the CSHN had a refining effect on the pore structures of FC, and it reduced the porosity of FC by 3.4% after curing for 7d. Due to the improvement of the pore structure properties of FC, its microwave absorption ability and heat transfer rate were increased, improving its microwave heating ability, correspondingly. Therefore, the CSHN was a favorable material, which could improve the early engineering performance and microwave heating ability of FC to some extent.

Mechanical and microstructural properties of cemented marine dredged clay with pre-hydrated ground granulated blast furnace slag

Marine dredged clay (MDC) is treated with large amounts of cement before being used as construction materials due to its highly water content, leading to a strong demand of economically friendly treatment method. Ground granulated blast furnace slag (GGBS) has been used in concrete production to replace partial cement, but its application in cementing MDC is rarely been investigated. Furthermore, previous studies ignore the self-hydration capacity of GGBS, which may weaken the effectiveness or cause the overuse of GGBS. This study provides a new mixing method (MMII) in treating MDC by pre-hydrating GGBS before mixing with cement, and conducts a series of laboratory tests on the cemented MDC. The influence of GGBS and the mixing method on the mechanical and microscopic properties was examined. The results show that the recommended pre-hydration time is 16 h. The cemented MDC with GGBS obtains higher strength and lower hydraulic conductivity than that of cement-treated MDC with pure cement. Under the influence of MMII, more hydration products are generated due to the two times of hydration, the UCS is improved by up to 20%, the hydraulic conductivity is reduced by up to 17% accordingly. Meanwhile, the size of Ca(OH)2 (CH) decreases to generate calcium silicate hydrate (CSH). By only change mixing order, the engineering performance of cemented MDC with GGBS is improved significantly, showing great engineering benefits and economic values in treating MDC by pre-hydrating GGBS.

A comprehensive review of radioactive pollution treatment of uranium mill tailings.

Natural uranium is a crucial resource for clean nuclear energy, which has brought significant economic and social benefits to humanity. However, the development and utilization of uranium resources have also resulted in the accumulation of vast amounts of uranium mill tailings (UMTs), which pose a potential threat to human health and the ecological environment. This paper reviews the research progress on UMTs treatment technologies, including cover disposal, solidification disposal, backfilling disposal, and bioremediation methods. It is found that cover disposal is a versatile method for the long-term management of UMTs, the engineering performance and durability of the cover system can be improved by choosing suitable stabilizers for the cover layer. Solidification disposal can convert UMTs into solid waste for permanent disposal, but it produces a large amount of waste and requires high operating costs; it is necessary to explore the effectiveness and efficiency of solidification disposal for UMTs, while minimizing the bad environmental impact. Backfilling disposal realizes the resource utilization of solid waste, but the high radon exhalation rate caused by the UMTs backfilling also needs to be considered. Bioremediation methods have low investment costs and are less likely to cause secondary pollution, but the remediation efficiency is low, it can be combined with other treatment technologies to remedy the defects of a single remediation method. The article concludes with key issues and corresponding suggestions for the current UMTs treatment methods, which can provide theoretical guidance and reference for further development and application of radioactive pollution treatment of UMTs.

Effects of Interface Morphology on the Shear Mechanical Properties of Sand-Concrete Interfaces.

The morphology of the contact surface between cast-in-place engineering structures and soil is generally random. Previous research focusing on the shear mechanical properties of soil-concrete interfaces has predominantly concentrated on the role of interface roughness by constructing regular concrete surface types, largely neglecting the potential impact of the roughness morphology (i.e., the morphology of the concrete surface). In this study, concrete blocks with the same interface roughness and different roughness morphologies were constructed based on the sand-cone method, including random rough surface, triangular groove surface, rectangular groove surface, trapezoid groove surface, and semicircular groove surface. A series of direct shear tests were conducted on the rough and smooth sand-concrete interfaces, as well as on natural sand. Through these tests, we examined the shear mechanical behavior and strength of the sand-concrete interfaces, and analyzed the underlying shear mechanisms. The results showed that: (i) the interface morphology had little effect on the variation in the shear stress-displacement curve of sand-concrete interfaces, and it had a significant influence on the shear strength of the interfaces; (ii) under the same normal stress, the shear strength of the sand-concrete interfaces with a random rough surface was the greatest, followed by the triangular groove surface, while the shear strength of the rectangular groove surface proved the lowest; (iii) the shear strength of the sand-concrete interfaces with the same roughness was affected by the size of the contact area between the concrete plane and the sand, that is, a larger contact area correlated with a decrease in shear strength. It can be concluded that the shear strength value of a sand-concrete surface with the triangular groove is the closest to the shear strength of a random rough interface. By gaining a deep understanding of the effects of different contact surface morphologies on shear strength and shear behavior, significant insights can be provided for optimizing engineering design and enhancing engineering performance.

Effect of wax additives on asphalt rheological behavior as road paving material

In response to the growing demand for sustainable and high-performance roads, various asphalt additives have been developed and introduced to pavement construction. The increasing practice of warm mix in asphalt industry advances the usage of wax additives. However, the concern of wax content poses challenges to the application of wax additives in asphalt pavement via wet process. To address this concern, this study comprehensively investigates the influence of wax content on asphalt binder through rheological and chemical characterization. Specifically, three types of wax additives (Fischer-Tropsch wax, fatty acid amide wax and 64# paraffin wax) were selected at two dosages (2 wt% and 4 wt%) incorporating into four types of asphalt binder (virgin asphalt, SBS modified asphalt, asphalt rubber and high-viscosity & high-elasticity asphalt) to formulate various wax modified asphalts. Rheological properties were characterized to assess the engineering performance. Wax content and chemical mechanisms were characterized to investigate wax modification. Results show that incorporating wax additives enhances the engineering performance of asphalt binders but is difficult to meet wax content requirement. Fischer-Tropsch and fatty acid amide waxes are effective in improving rutting and fatigue resistance, whereas paraffin wax has an overall negative effect. Wax modification promotes the asphalt wax crystallization, leading to a further increased wax content and compromised low-temperature performance on asphalt binders, where modified asphalts can alleviate this adverse effect. Wax additives compromise low-temperature performance of virgin asphalt, but minimally impact modified asphalt. Careful wax content consideration is vital for virgin binders, while more flexibility of adjusting wax additive dosage is beneficial for enhancing overall of modified asphalt. This study is anticipated to prompt the understanding the influence of wax content on asphalt binder and benefit the industrial application of wax additives.

DEALING WITH AN EXISTENTIAL THREAT FROM CLIMATE CHANGE AT EBEYE, MARSHALL ISLANDS: STRUCTURAL PROTECTION AGAINST STORM EROSION AND WAVE OVERTOPPING

Located in the Pacific between Australia and Hawaii, the Republic of Marshall Islands (RMI) is one of the World’s smallest, most isolated and vulnerable nations. Ebeye, a small low-lying and densely populated island on Kwajalein Atoll (Figure 1), is at risk from coastal inundation and erosion due to swell waves and typhoons. Impacts will be magnified as sea levels rise. The key engineering performance Objectives and Level of Service (LOS) standards include design life, acceptable structural damage and wave overtopping, and time-dependent climate change effects including sea level rise and changes in typhoon intensity.

Gasified olive stone biochar as a green construction fill material

The rapid growth in biomass waste generation from industrial and agricultural sectors has emerged as a significant global challenge. One potential solution to address this challenge is to utilize biomass waste materials as sustainable construction materials, which can mitigate landfilling concerns, reduce the need for natural materials and ultimately minimize carbon emissions. This study focused on the evaluation of the engineering and environmental properties of olive stone biochar (OSB) as a green construction fill material. OSB is the solid residue resulting from biomass gasification in a waste-to-energy plant. The properties of OSB were compared to those of recycled glass (RG), a mainstream construction and demolition (C&D) waste material in Australia, for benchmarking purposes. Extensive laboratory tests were conducted on unbound OSB, RG and OSB/RG blends. The results indicated that gasified OSB was a stable biomass material and it exhibited good engineering performance when used as a construction fill material. In cases where higher strength was required, OSB can be blended with RG to achieve higher values of California bearing ratio (CBR) and resilient modulus. All OSB/RG blends were found to meet the minimum CBR requirement for subgrade materials as specified by the local road authority. Environmental tests revealed that the application of OSB as a construction fill material would not have any adverse environmental impact. This research highlighted the potential for OSB to replace virgin quarry materials in geotechnical fill and road subgrade applications. The involvement of biochar as a carbon sink in construction works also aligns well with the strategy to manufacture green materials within the construction industry, as it serves the dual purpose of locking carbon in a stable state within infrastructures and boosting waste reutilization rates simultaneously.

Developing fired clay bricks by incorporating scrap incinerated waste and river dredged sediment

The global extraction of several billions of clean clay resources, which destroy millions square meters of land, is triggering environmental problems. Incorporating different dosages of incinerated waste or dredged sediment in bricks production has been studied by many researchers. Research articulating the combined effect of incinerated waste material (IWM) and river dredged sediments (RDS) addition on the performance of bricks is scarce. This paper aims to present findings on the engineering performance of fired bricks developed with the addition of IWM and RDS. In this regard, bricks were made with 5 wt% IWM and different dosages of RDS (i.e., 0 – 15 wt%). Physical, durability, mechanical, thermal and microstructure of the developed bricks is examined. Bricks’ shrinkages were found meeting quality performance criterion in the 1.42 – 4.11% range. The highest bulk density of 1.85 g/cm3 permit to classify bricks obtained as lightweight. Water absorptions were mostly within the acceptable 20% tolerance level postulating the developed bricks high durability standard. Compressive strength reductions, which were confined within 5.28 and 21.57 MPa, showed the developed bricks applicability to structural weight-supporting construction as well as specialized engineering construction works. The 40.5% thermal conductivity reduction in WB15 bricks (at 800 °C) theorized its suitability for thermal insulation construction. Mineralogical and morphological analyses of fired bricks clearly showed kaolinite polymorphic phase transformation, which contributed to the different morphologies in the brick matrices. Consequently, reuse of IWM and RDS offered a chance to advance sustainable use of scarce clay resources in lightweight and thermal insulation brick production.

Performance assessment of recycled waste materials for use in unbound pavement Layers: A case study from Turkey

Construction and demolition wastes (CDW) have become uncontrollable due to population expansion, fast urbanization, ongoing technological advancements, and changing building materials throughout time, as well as the storage of these wastes and the environmental degradation they create. In addition, recently, the depletion of natural resources and rising expense of waste disposal have increased the importance of recycling and reuse of waste. Recycling and reuse of CDW can reduce the rate of depletion of natural aggregate resources, landfill area and carbon footprint. However, the lack of knowledge about parent concrete's qualities, such as compressive strength, is one of the most significant barriers to using these waste materials. In addition, further research is needed on the use of high-strength building waste that was devastated by earthquakes and floods as aggregates. The study aimed to investigate the quality of waste concrete and assess the usability of mixtures prepared using recycled aggregates obtained from waste concrete with a predetermined strength of 35–40 MPa in combination with crushed limestone aggregate in granular road base and sub-base layers. The engineering performance of RCA will be evaluated, along with a comparison to natural aggregate, and its compliance with the limit values given in the Turkey Highways Technical Specifications (THTS) will be examined. 5 different mixes were created by replacing RCA with LA at 0%, 25%, 50%, 50%, 75%, and 100%. The strength, durability and hydraulic properties of the prepared mixtures were investigated. It was concluded that the use of RCA had no negative effects on the mixture's properties, with the exception of permeability, and even outperformed natural aggregate in terms of soaked and unsoaked CBR, CBR strength after a freeze–thaw cycle, and modulus of elasticity. Additionally, it was established that RCA satisfies the standards set in the THTS for the materials to be used in granular road base and sub-base layers.

Effective utilisation of waste cement concrete dust in bituminous concrete

The suitability of waste cement concrete dust (CD) and conventional hydrated lime (HL) as fillers in bituminous concrete was investigated. Bituminous mixes containing CD or HL in different proportions were designed. Their performance was studied using the Marshall quotient, indirect tensile strength, tensile strength ratio (TSR), passive and active adhesion and Cantabro tests. The cost of the various mixes and their greenhouse gas (GHG) emissions were also compared. Finally, the optimum filler content for both mixes was determined. The mixes containing CD displayed rutting, cracking and ravelling resistance similar to those of conventional mixes. CD offered improved affinity towards bitumen and ensured excellent moisture resistance (TSR > 80%). Compared with a traditional mix (4% HL), the use of CD marginally lowered the cost by around 3–8% and reduced the GHG emissions by more than 50%. Overall, the addition of CD ensured satisfactory engineering performance at a relatively lower cost and significantly lower GHG emissions.

Enhanced cement formation for well completion in gas hydrates reservoirs

Natural gas hydrates (NGHs) have abundant reserves and are greener energy source compared to petroleum resources. Intense heat release of cement slurry impacts the stability of NGHs during oil well cementing operations. Conventional low hydration-heat cement slurries significantly reduce the early-stage strength. In this paper, a novel strategy to optimize the exothermic and mechanical properties of cement slurry is proposed with the synergistic effects of various mineral admixtures and additives. The hydration heat and microstructure of cement with different admixtures were studied through isothermal calorimetry (IC), semi-adiabatic temperature test (ST), scanning electron microscopy (SEM), X-ray diffraction (XRD) and mechanical strength tests. The results indicate that the addition of nanosilica (NS) and C–S–H seeds lead to high early-stage strength for cement slurry substituted with high-volume fly ash (FA) and ground granulated blast furnace slag (GGBS), which meets the engineering performance for NGHs cementing. Compared with neat cement, blended cement designed with the new strategy has a 40.46% lower cumulative heat and a 56% higher compressive strength after 24 h. However, ST showed that the separated hydration heat rate peaks recombine together at higher temperature. The thermal storage performance of solid-solid phase change material (SSP) can effectively control the temperature rise due to cement hydration and maintain the separation of hydration heat rate peaks. This study provides novel ideas for the construction of low hydration heat and high early-stage strength cement slurry, and also provides key theoretical and methodological support for the performance control of cement slurry for NGHs cementing.

Retracted: Influence of Nano-Cutting Fluid in New Cutting and Forming Processes on Heat Transfer Performance of Mechanical Engineering.

[This retracts the article DOI: 10.1155/2022/5603355.].

Feasibility assessment of palmitamide derived from waste edible oil as a warm mix asphalt additive

The disposal of waste edible oil (WEO) has become a global challenge with both environmental and economic issues. To provide a novel strategy for the refinement recycling of WEO, this work investigated the feasibility of palmitamide derived from WEO as a warm mix asphalt (WMA) additive. The molecular structure and thermodynamic characteristics of palmitamide were first determined. Following, WMA binders with different palmitamide contents were prepared and their temperature sensitivity and rheological properties were evaluated. Additionally, the engineering performance of WMA mixtures was explored and the environmental benefits of WEO-derived palmitamide were assessed using the gas chromatography-mass spectrometry. The results demonstrate that the phase transition temperature of WEO-derived palmitamide is 98.87 °C, which shows great potential as a WMA additive. Palmitamide provides asphalt workability suitable for construction at relatively low temperatures through reducing the flow activation energy of asphalt. In addition, the moisture damage resistance and deformation resistance of WMA is also improved due to the hydrophobicity and filling effect of palmitamide, respectively. While it is inevitable that palmitamide slightly weakens the fatigue and low-temperature performance of WMA. Moreover, the application of WEO-derived palmitamide can reduce the volatile organic compounds of asphalt in the mixing stage and compaction stage by 40.3% and 30.8%, respectively. The findings contribute to the sustainable development of road engineering and the circular of waste resources.

A novel bio-carbonation method of reactive magnesia with urea pre-hydrolysis for geomaterial stabilisation

This study proposes a novel bio-carbonation method of reactive magnesia cement (RMC) with urea pre-hydrolysis for geomaterial stabilisation. Urea pre-hydrolysis in the bacterial solution before mixing with RMC produces more carbonate and ammonia, facilitating the RMC bio-carbonation to form more hydrated magnesia carbonates (HMCs), the dominant product that contributes to strength gain. The effect of urea pre-hydrolysis on the engineering performance of bio-carbonated samples is investigated through a series of RMC bio-carbonation geomaterial stabilisation tests with various pre-hydrolysis times and urea concentrations. The results show that the proposed method can improve material utilisation, enhance the RMC bio-carbonation reaction and promote geomaterial stabilisation performance. The relationships between the unconfined compressive strength (UCS) of bio-carbonated samples and the amount of HMCs are studied using a proposed indicator, the degree of carbonation (DC). However, the strength increment is not monotonically related to the amount of HMCs. The optimal pre-hydrolysis time is 6–12 h for bio-carbonated samples with UCS up to 3·79 MPa, and the maximum UCS increase in the samples is up to 404·42%. The critical DC values are in the range 0·23–0·36 with varying urea concentrations. The proposed method has implications for the design of bio-carbonated RMC in field applications.

Robust, high-temperature and solvent tolerant, yet detachable polyimide adhesives enabled by dynamic boroxines

Detachable polymeric adhesives (DPAs) usually exhibit weak environmental reliability due to the intrinsic reversible network. Herein, such problem is solved by incorporating dynamic covalent boroxine bonds into high performance engineering polyimide (PI) network as crosslinkers. We demonstrate the boroxine crosslinked PI DPAs (denoted as PI-B3O3 DPAs) with simultaneously robust tensile strength (111.3 MPa), high interfacial bonding strength (26.0 MPa), and extremely environmental reliability including high-temperature tolerance (5% weight loss of ∼541.6 °C, adhesion strength after pretreating of 25.8 MPa at 300 °C, 22.6 MPa at 350 °C, and 18.3 MPa at 400 °C) and solvent stability (10 different solvents including acids, bases and organic solvents). Moreover, the PI-B3O3 DPAs can be further detached and recycled with the help of specific mixture solvent. The high tensile strength and extremely environmental tolerance are enabled by the rigid PI main chain and high bond energy of boroxines. Besides, the boroxine crosslinkers in PI-B3O3 network can help to balance its cohesion energy and interfacial adhesion energy, which guarantees its robust initial bonding strength in DPAs. At Last, due to the high reversibility of boroxines, the PI-B3O3 DPAs can be conveniently detached and recycled in the presence of specific mixture solvent.