Dealkaline Lignin Research Articles

Green synthesized lignin nanoparticles for the sustainable delivery of pyraclostrobin to control strawberry diseases caused by Botrytis cinerea

Lignin, renowned for its renewable, biocompatible, and environmentally benign characteristics, holds immense potential as a sustainable feedstock for agrochemical formulations. In this study, raw dealkaline lignin (DAL) underwent a purification process involving two sequential solvent extractions. Subsequently, an enzyme-responsive nanodelivery system (Pyr@DAL-NPs), was fabricated through the solvent self-assembly method, with pyraclostrobin (Pyr) loaded into lignin nanoparticles. The Pyr@DAL-NPs shown an average particle size of 250.4 nm, demonstrating a remarkable loading capacity of up to 54.70 % and an encapsulation efficiency of 86.15 %. Notably, in the presence of cellulase and pectinase at a concentration of 2 mg/mL, the release of Pyr from the Pyr@DAL-NPs reached 92.66 % within 120 h. Furthermore, the photostability of Pyr@DAL-NPs was significantly improved, revealing a 2.92-fold enhancement compared to the commercially available fungicide suspension (Pyr SC). Bioassay results exhibited that the Pyr@DAL-NPs revealed superior fungicidal activity against Botrytis cinerea over Pyr SC, with an EC50 value of 0.951 mg/L. Additionally, biosafety assessments indicated that the Pyr@DAL-NPs effectively declined the acute toxicity of Pyr towards zebrafish and posed no negative effects on the healthy growth of strawberry plants. In conclusion, this study presents a viable and promising strategy for developing environmentally friendly controlled-release systems for pesticides, offering the unique properties of lignin.

Photocatalytic depolymerization of lignin to produce high value-added chemicals by carbon quantum dots modified WO3 nanosheets

Photocatalysis, a sustainable development strategy, employed to produce value-added chemicals from lignin, has attracted much attention due to its low energy consumption and mild reaction conditions. Carbon quantum dots (CQDs) and tungsten oxide (WO3) composite photocatalysts (CQDs/WO3) were prepared by ultrasonic assisted wet impregnation method in this study. The CQDs/WO3 nanosheets exhibit good optical properties and satisfactory performance of lignin depolymerization. Characterization results embody that the addition of CQDs significantly changes the morphology of WO3. Compared with bulk pure WO3, CQDs/WO3 becomes a nanosheet structure in the size of ∼ 200 nm. Furthermore, CQDs can absorb photogenerated electrons as well as reduce the recombination of photogenerated electrons and holes. The strong oxidizing ability of n-type semiconductor WO3 enables it to effectively break the typical bonds like C-O or C-C near polar functional groups in lignin. Due to this ingenious design, dealkaline lignin conversion was up to 34.21% as well as the highest yields of vanillin and vanillic acid in the form of lignin were 24.74 mg/g and 8.02 mg/g in 2 h at room temperature, visible light illumination and air atmosphere, respectively. And optimized CQDs/WO3 also had satisfactory effects on three natural lignin (grass lignin, pine lignin and birch lignin), which proved its universality. Electron spin resonance experiments and mechanism investigation demonstrated that ·O2- and ·OH play a weighty role in photocatalytic depolymerization of lignin. This study provides a new gambit for converting lignin to high value-added chemicals (vanillin and vanillic acid) over modified WO3.

Lignin‐Alkali Metal Ion Self‐Catalytic System Initiated Rapid Polymerization of Hydrogel Electrolyte with High Strength and Anti‐Freezing Ability

AbstractHydrogel electrolyte is not resistant to freezing and has weak mechanical properties, and its fabrication is time‐consuming and energy‐consuming, limiting its application. Here, a simple, universal, and fast gelation based on dealkaline lignin (DL) ‐alkali metal ions is developed. The complex formed by catechol and alkali metal ions promotes the equilibrium of redox reactions. The produced SO4−·, OH· and singlet oxygen (1O2) radicals are responsible for the rapid polymerization of vinyl monomers. Alkali metal ions play a dual role in the rapid polymerization and frost resistance of hydrogel electrolytes. By modulating the mass ratio of DL and metal ion concentration, the preferred hydrogel electrolyte can be fabricated in an alkaline aqueous solution for 4 min at room temperature and possesses excellent anti‐freezing performance (0.51 mS cm−1 at −40 °C) and strong mechanical properties (tensile stress: 0.4 MPa, strain: 1125%). The hydrogel electrolyte‐assembled supercapacitor exhibits high stability at low temperatures. The specific capacitance retention is 89.7 % and 88.7 % after 5000 charge/discharge cycles at 25 and −20 °C, respectively. The lignin‐alkali metal ions self‐catalytic system completely different from the reported lignin‐oxidizing metal ion system will open up a new way for the fabrication of anti‐freezing ionic conductors and energy storage devices.

Efficient lignin depolymerization by continuous flow microreactor-assisted electrochemical advanced oxidation in water/co-solvent system

The employment of EAOP using a continuous flow microreactor for efficient lignin depolymerization under ambient conditions.

Thermal resistance of polyurethane adhesives containing aluminum hydroxide and dealkaline or alkaline lignin

AbstractFor the sustainability of the polyurethane resin (PUR) industry, petroleum‐based materials must be replaced with renewable resource and economic aspects must be considered. Lignin is a renewable, thermostable biomass consisted with a phenolic polymer. As a thermostable bio‐filler for PUR adhesives, acidic or basic lignin was blended with an amphiprotic inorganic filler, to reduce the resins and product costs due to cheap, unmodified materials. The thermal resistance of the PUR adhesives was evaluated by measuring adhesion before and after heating and with and without a mechanical effect caused by substrate penetration. The results show that after heating at 200°C, the PURs containing 7.5 or 15 wt% of dealkaline lignin or 7.5 wt% of alkaline lignin decomposed more slowly than the lignin‐free PUR. The properties of the PURs were also analyzed using Fourier‐transform infrared spectroscopy and differential scanning calorimetry. Additionally, the PURs containing over 30 wt% of dealkaline lignin show potential as environmentally friendly water‐blown PUR foams.

Unlocking green potential: Enhancing biomass valorization via thermal depolymerization with spent catalysts

Effective catalysts for the thermal depolymerization of biomass present an attractive way to reduce energy consumption. This study investigated the effect of spent ZSM-5 catalysts on product distribution through thermal catalytic depolymerization. The spent catalyst has similar properties to the commercial fresh catalysts, as assessed through characterization analysis. The utilization of spent catalysts can enhance the production of bio-oil. The bio-oil yields for rice straw, brown solid, alkaline, and dealkaline lignin by catalytic depolymerization are 11%, 31%, 6%, and 21%, respectively. Therefore, depolymerization using a spent catalyst is a promising method to degrade lignocellulose.

Influence of Packing Density on Electrochemical Performance of Lignin

Abstract Bio-based carbonaceous materials such as lignin are taking up increasingly important roles in energy storage. However, the wide spectrum of molecular identity and structure of lignin lead to inconsistent structure, properties, and performance because of its source, extraction, and pretreatment processes. In this research, we investigate the effects of packing density on the electrochemical performance for lignin. Samples were synthesized using lignin as the electroactive material. Four distinct types of lignin, i.e., alkali lignin microparticles (MP), alkali lignin nanoparticles (NP), dealkaline lignin MP, and dealkaline lignin NP, were used in this study. They were studied through varying the packing density and its subsequent effects on the electrochemical performance. The scanning electron microscopy and Fourier-transform infrared spectrometry analysis were conducted to obtain morphology and chemical compositions. Cyclic voltammetry and cyclic charge discharge tests were conducted to evaluate the polarization resistance. The optimal packing density was found to be in the range of 0.35–0.50 g cm−3 for all samples. In the optimal packing density range, dealkaline lignin NP displayed the highest electrochemical performance with a maximum specific capacitance of 1,159 mF g−1, an energy density of 19.097 Wh kg−1, and a power density of 11.05 kW kg−1. The optimization of packing density would enable further development of lignin-containing energy storage devices such as supercapacitors.

The structure and properties of lignin isolated from various lignocellulosic biomass by different treatment processes

The structure and properties of lignin can vary depending on the type of lignocellulosic biomass it comes from and the separation techniques used, and also affects its suitability for different applications. In this work, the structure and properties of lignin isolated from moso bamboo, wheat straw, and poplar wood by different treatment processes were compared. Results show that deep eutectic solvent (DES) extracted lignin exhibits well-preserved structures (including β-O-4, β–β, and β-5 linkages), a low molecular weight (Mn = 2300–3200 g/mol), and relatively homogeneous lignin fragments (1.93 < PDI < 2.33) compared to dealkaline lignin (DL) and milled wood lignin (MWL). Besides, lignin samples extracted by DES have a regular nanostructure, higher carbon residue content (>40 %), and excellent antioxidant properties (the free radical scavenging index >20). Among the three types of biomass, the structural destruction of lignin in straw is the most obvious, which is due to the degradation of β-O-4 and β-β linkages during DES treatment. These findings can contribute to a better understanding of the structural changes that occur in various treatment processes from different lignocellulosic biomass, and help maximize the targeted development of their applications based on the characteristics of lignin.

Mechanistic insights into the lignin dissolution behavior in amino acid based deep eutectic solvents

Deep eutectic solvents (DESs) composed by amino acids (L-arginine, L-proline, L-alanine) as the hydrogen bond acceptors (HBAs) and carboxylic acids (formic acid, acetic acid, lactic acid, levulinic acid) as hydrogen bond donors (HBDs) were prepared and used for the dissolution of dealkaline lignin (DAL). The mechanism of lignin dissolution in DESs was explored at molecular level by combining the analysis of Kamlet-Taft (K-T) solvatochromic parameters, FTIR spectrum and density functional theory (DFT) calculations of DESs. Firstly, it was found that the formation of new hydrogen bonds between lignin and DESs mainly drove the dissolution of lignin, which were accompanied by the erosion of hydrogen bond networks in both lignin and DESs. The nature of hydrogen bond network within DESs was fundamentally determined by the type and number of functional groups in both HBA and HBD, which affected its ability to form hydrogen bond with lignin. One hydroxyl group and carboxyl group in HBDs provided active protons, which facilitated proton-catalyzed cleavage of β-O-4, thus enhancing the dissolution of DESs. The superfluous functional group resulted in more extensive and stronger hydrogen bond network in the DESs, thus decreasing the lignin dissolving ability. Moreover, it was found that lignin solubility had a closed positive correlation with the subtraction value of α and β (net hydrogen donating ability) of DESs. Among all the investigated DESs, L-alanine/formic acid (1:3) with the strong hydrogen-bond donating ability (acidity), weak hydrogen-bond accepting ability (basicity) and small steric-hindrance effect showed the best lignin dissolving ability (23.99 wt%, 60 °C). On top of that, the value of α and β of L-proline/carboxylic acids DESs showed some positive correlation with the global electrostatic potential (ESP) maxima and minima of the corresponding DESs respectively, indicating the analysis of ESP quantitative distributions of DESs could be an effective tool for DESs screening and design for lignin dissolution as well as other applications.

Oxidative depolymerization of lignin to vanillin and lactic acid in an aqueous solution

A heterogeneous molybdenum (Mo)-based oxide catalyst system in combination with hydrogen peroxide as an oxidant was developed for oxidative depolymerization of lignin to yield high-value platform chemicals in a nearly neutral aqueous solution. The impact of various reaction conditions, including the ratios of H2O2 and/or MoO3/Al2O3 catalyst to lignin, reaction temperature and duration, and lignin concentration, were investigated in a batch system or a continuous flow fixed-bed system. The structural changes between dealkaline lignin and the recovered lignin (O-lignin and M−lignin) were analyzed using UV–vis, FT-IR, and GPC techniques. The combination of MoO3 and H2O2 resulted in a superior peroxo complex, promoting the formation of vanillin and lactic acid. The medium and weak acid feature of MoO3/Al2O3 catalyst induced the highest vanillin yield (5.6%) and the selectivity (86.9%) of main platform products. However, the highest yield of lactic acid (3.4%) was observed on MoO3/SiO2 with more weak acid sites. Hypothetical formation mechanisms for vanillin and lactic acid were proposed based on the depolymerization of lignin model compounds.

Impact of Different Lignin Sources on Nitrogen-Doped Porous Carbon toward the Electrocatalytic Oxygen Reduction Reaction.

Lignin is an ideal carbon source material, and lignin-based carbon materials have been widely used in electrochemical energy storage, catalysis, and other fields. To investigate the effects of different lignin sources on the performance of electrocatalytic oxygen reduction, different lignin-based nitrogen-doped porous carbon catalysts were prepared using enzymolytic lignin (EL), alkaline lignin (AL) and dealkaline lignin (DL) as carbon sources and melamine as a nitrogen source. The surface functional groups and thermal degradation properties of the three lignin samples were characterized, and the specific surface area, pore distribution, crystal structure, defect degree, N content, and configuration of the prepared carbon-based catalysts were also analyzed. The electrocatalytic results showed that the electrocatalytic oxygen reduction performance of the three lignin-based carbon catalysts was different, and the catalytic performance of N-DLC was poor, while the electrocatalytic performance of N-ELC was similar to that of N-ALC, both of which were excellent. The half-wave potential (E1/2) of N-ELC was 0.82 V, reaching more than 95% of the catalytic performance of commercial Pt/C (E1/2 = 0.86 V) and proving that EL can be used as an excellent carbon-based electrocatalyst material, similar to AL.

Dissolved Organic Matter and Lignin Modulate Aquatic Toxicity and Oxidative Stress Response Activated by Layered Double Hydroxides Nanomaterials.

Advanced nanomaterials can be released into the environment and can coexist with natural organic matter (NOM). However, evidence on the impacts of NOM on the environmental behavior and toxicity of advanced nanomaterials is still scarce. Here, we investigated the behavior and toxic effects of two layered double hydroxides (LDHs) nanomaterials with different metallic constituents (Mg-Al-LDH and Zn-Al-LDH) at relatively low exposure concentrations on a freshwater green alga (Chlorella pyrenoidosa) in the absence and presence of two types of NOM, namely dissolved organic matter (DOM) and dealkaline lignin (DL). The DOM or DL interaction with the LDHs at different mixture levels was shown to be an antagonistic effect on the growth inhibition toxicity to C. pyrenoidosa mainly. The estimation of the index of Integrated Biological Responses version 2 indicated that the joint interaction of the LDHs with DOM or DL occurred in the following order of frequency synergism > antagonism > additivity. Furthermore, the physicochemical characteristics of LDHs were crucial for illuminating the mechanism by which the DOM or DL modified the LDH-induced oxidative stress response. These findings highlighted the important role of NOM in the behavior and effect of LDHs as a representative of a new class of multifunctional nanomaterials in the freshwater environment.

The effect of water content on lignin solubilization in deep eutectic solvents

Highly efficient, reversible and green dissolution of lignin is still a challenge, which hinders its wide scale-up applications. In this study, amino acid-polyol deep eutectic solvents (DESs) by employing l-arginine (l-Arg) and l-proline (l-Pro) as HBA and ethylene glycol (EG) and glycerol (Gly) as HBD were prepared as well as applied for dealkaline lignin (DAL) dissolution, to explore the efficient system for lignin dissolution and unveil the solubilization mechanism. The mostly used choline chloride (ChCl) based DESs were also evaluated as controlled groups. It was found that the higher value of α (hydrogen-bond donating ability) of DESs was conducive for DAL dissolution, due to the high content of β-O-4 bond in DAL. Among all the investigated DESs at water content of 2 wt%, ChCl/LA with the highest value of α (2.35) presented the best lignin dissolving ability (29.09 wt%). The effects of water content on the lignin dissolving ability of hydrated DESs were tested and discussed detailly, from a microcosmic perspective by using Fourier transform infrared spectroscopy (FTIR), 1H nuclear magnetic resonance (1H NMR), solvatochromic parameters and quantum chemistry calculations. It was remarkable to find that added water greatly improved the mass transfer and activated the reaction sites in both l-Pro and l-Arg based DESs, thus enhancing or maintaining the lignin solubilities at high water concentrations. The hydrated l-Arg/EG DESs allowed a solubility enhancement of 3.49 and 2.16 times at 70 and 90 wt% water concentration, compared to l-Arg/EG/2 wt%H2O at 60 °C, which was environmentally friendly and economically attractive. However, the addition of water was a negative factor for ChCl based DESs, because water preferred to interact with Cl− with strong electronegativity, resulting in stronger interaction energy between hydrogen bond donors (HBD) and Ch+. This work provided a bridge connecting the microstructure and dissolving behavior of hydrated DESs, indicating that the addition of water could make DESs more versatile and flexible, thus boosting various potential applications such as gas capture, the dissolution and delivery of medicine.

Structure elucidation of prot, alkali and dealkaline lignin(s) by NMR, FT-IR and Py-GC/MS: effect of solid acid and base catalysts

Mechanistic breaking of lignin(s) was studied to see their potential toward valuable compounds. The breaking of bonds in the H, G, and S-type sub-aromatic units was affected by the acidic and basic properties of the catalyst(s).

Pyrolysis of dealkaline lignin to phenols by loading grinding beads in a rotary kiln reactor

The pyrolysis of dealkaline lignin to phenols was performed in a rotary kiln reactor using grinding beads as filler. The effects of pyrolysis temperature and the amount and material of grinding beads on the liquid yield and composition were investigated. The results showed that the use of the rotary kiln reactor loaded with grinding beads could improve the efficiency of lignin pyrolysis. Temperature had a considerable influence on the pyrolysis process. The maximum liquid yield of 52.10 % was obtained at 500 °C and carrier gas flow rate of 300 mL min−1. Compared with other grinding beads, γ-alumina spheres could result in higher liquid yield and selectivity for guaiacols and alkylphenols. The liquid yield increased significantly with the use of grinding beads and increased with the increase in the number of grinding beads. However, both liquid yield and selectivity for guaiacol decreased when the volume ratio of grinding beads to reaction chamber increased from 1:2–2:3. The present study confirms the facilitative effect of grinding beads on the pyrolysis reaction, with the maximum increase of 86.87 % liquid yield and 12.58 % selectivity for guaiacol and alkyl phenols.

Lignin depolymerization with alkaline ionic liquids and ethylene glycol in a continuous flow reactor

A novel alkaline ionic liquids N-allylpyridinium hydroxide ([APy]OH) was successfully designed and developed as a catalyst and co-solvent with ethylene glycol in the continuous depolymerization of lignin. Various reaction conditions, like lignin concentration, water content, and reaction temperature, were investigated under atmospheric pressure. Ethylene glycol was used as main solvent and repolymerization inhibitor of the aldehydes produced. The combination of [APy]OH and alkali metal salts exhibited a good synergistic effect for lignin depolymerization. Then, the depolymerization of three different lignins, including dealkaline lignin (DA-lignin), alkaline lignin (A-lignin), and sodium lignosulfonate (S-lignin), were also studied. S-lignin exhibited the highest yields of total liquid products (21.3 %) and aromatics (10.7 %). The change in lignin structure after depolymerization was observed by means of FT-IR and DTG-DTA techniques. Lastly, a hypothetical pathway for lignin depolymerization was proposed based on the catalytic results of lignin model compounds (LMCs) with different linkages.

Enabling efficient dissolution and fractionation of lignin by renewable and adjustable dimethyl isosorbide-based solvent systems

Efficient dissolution is highly important for upgrading of lignin into useful chemicals, which relays on the development of robust solvent systems. Herein, a novel, green, and robust solvent system for lignin dissolution was developed using biomass-derived dimethyl isosorbide (DMI) and water. Interestingly, the developed DMI-based solvent systems showed good ability to dissolve different types of lignin, i.e., alkali lignin (AL), enzymatic hydrolysis lignin (EHL), kraft lignin (KL) and dealkaline lignin (DAL), by tuning the weight ratio of DMI and water. Systematic investigations revealed that the lignin solubility correlated with Hansen solubility parameters and Kamlet-Taft parameters although the relationship varied with the lignin type. More importantly, lignin (with AL as an example) fractions with controlled molar mass could be obtained via gradient precipitation by gradually increasing the water content in the solvent system. Additionally, DMI had a good recyclability, and the recycled DMI showed no obvious decrease in the ability to dissolve lignin. This work provided an innovative and green solvent system to dissolve lignin, contributing to the realization of a “closed-loop” biorefinery process.

Designing degradable lignin-grafted magnetic nano-composite materials for cost-effectively sustainable removal of fluoroquinolone antibiotics from environmental water

Developing a novel green adsorbent to meet the requirements of low-cost, high quality of enrichment for analytes, and environmental sustainability is significant but remains a challenge. Herein, an eco-friendly dealkaline lignin-grafted magnetic iron oxide nanoparticle (Fe 3 O 4 @DAL) used as a dispersion solid adsorbent for the removal of fluoroquinolone antibiotics (FQs) from environmental water was developed based on the amide reactions between cost-effective plant-derived dealkaline lignin (DAL) and amino-functionalized Fe 3 O 4 nanoparticles at room temperature. Fe 3 O 4 @DAL combined with the advantages of lignin and magnetic nanoparticles , which had abundant functional groups (phenols and aliphatic hydroxyl, carboxyl, phenyl) and high separation efficiency, so typical FQs including pefloxacin (PEF), lomefloxacin (LOM), enrofloxacin (ENR) and difluoxacin (DIF) could be easily removed by multiple interactions. The Langmuir isotherm model and pseudo-second-order model could be more suitable to describe the adsorption process of FQs on Fe 3 O 4 @DAL. The maximum adsorption capacities of Fe 3 O 4 @DAL for PEF, LOM, ENR, DIF were 25.2 mg g −1 , 19.2 mg g −1 , 30.0 mg g −1 , 33.7 mg g −1 , respectively. And the total maximum adsorption capacities of four FQs could reach 108.2 mg g −1 . The whole adsorption process was spontaneous and endothermic based on thermodynamic data . Moreover, Fe 3 O 4 @DAL was of great reusability and could be used at least 5 cycles. In particular, the recycled adsorbent can be degraded as slow-release fertilizer under the action of soil microorganisms , which helps the growth of plants and further expands application range of lignin. As an effective, environmental-friendly, low-cost adsorbent for alleviating FQs contamination not only increased the added value of natural raw materials, but also had a great potential in the field of water treatment . • The environment-friendly dealkaline lignin-grafted Fe 3 O 4 nanoparticles (Fe 3 O 4 @DAL) were first prepared. • Multiple interactions resulting in highly efficient removal of FQs. • Superior adsorption and reusability performance of Fe 3 O 4 @DAL were confirmed. • The recovered Fe 3 O 4 @DAL could be degraded as fertilizer to help the growth of crops. • Fe 3 O 4 @DAL increased added the value of natural raw materials.

Hydrogen production from supercritical water gasification of lignin catalyzed by Ni supported on various zeolites

In the present study, supercritical water gasification of dealkaline lignin catalyzed by Ni supported on different zeolites (3A, 4A, 5A, 13X and ZSM-5) was investigated. Scanning electron microscopy-energy dispersive X‐ray spectrometry (SEM-EDS), N2 adsorption–desorption and X-ray diffraction (XRD) were used to characterize the catalyst. Most of these catalysts enhanced the gasification except Ni/ZSM-5, and the order of their catalytic activity was: Ni/4A > Ni/3A > Ni/5A > Ni/13X > Ni/ZSM-5. The higher activity of Ni/4A was probably because it has mesopores with proper size to disperse Ni and provide more active sites for the reaction. With the catalysis of Ni/4A, the hydrogen selectivity was increased from 27.07% to 42.61%, and the H2 yield increased from 3.14 mol/kg to 5.63 mol/kg. With Ni/4A, the prolongation of reaction time improved the gasification efficiency and hydrogen production, but its impact became less pronounced when it was above 20 min. The increase of the Ni loading amount from 0 to 30 wt% in Ni/4A improved the hydrogen yield by 1.9 times to 6.2 mol/kg, but its further increase from 30 wt% to 50 wt% had less influence.

High-efficient lignin-based polymerizable macromolecular photoinitiator with UV-blocking property for visible light polymerization

Developing high-efficient visible light macromolecular photoinitiator (macro PI) with excellent initiation performance, low migration, high biosafety and multi-function is beneficial to broaden the application of photopolymer. Lignin contains chromophores which could generate free radicals under light irradiation. In this study, a lignin-based polymerizable macro PI (DAL-11ene-amine) was designed and synthesized through covalent grafting 10-undecenoyl chloride (11ene) and hydrogen donor 4-(dimethylaminobenzoic acid) ethyl ester (EDAB) into dealkaline lignin (DAL) skeleton. The structure of DAL-11ene-amine was characterized by UV–vis, FTIR, 1H NMR, GPC, and 31P NMR spectra. Under the irradiation of a 405 nm LED, DAL-11ene-amine can directly produce active species and initiate the polymerization of acrylate monomers or thiol-ene click reaction. The photoinitiation efficiency of DAL-11ene-amine is higher than that of DAL-11ene or the two-component combination of DAL-11ene and EDAB. Using DAL-11ene-amine as PI, the prepared polymer films exhibit excellent UV-blocking property. With only 0.5 wt% addition of DAL-11ene-amine, nearly 100% of UVB + UVC and the most of UVA can be blocked by the films. Moreover, DAL-11ene-amine exhibits higher migration stability and biosafety because it can be covalently linked into polymer cross-linking networks. The results indicate that DAL-11ene-amine has great application potentials in preparing environmentally friendly UV-blocking films and biosafety coatings.