Surface modification of lignin for applications in polypropylene blends

Atifi, Siham; Miao, Chuanwei; Hamad, Wadood Y.

doi:10.1002/app.45103

Cited by 37 publications

(26 citation statements)

References 35 publications

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“…Although the target lignin was the LRC one because of its higher purity, the re‐dispersion mechanism of the HRC lignin pointed out a potential solution to the dispersion issues of small LRC lignin particles in PP matrix. The details of this part, which is related to the surface treatment of lignin particles, has been addressed in a separate paper elsewhere . All subsequent lignin processing work focused on the LRC lignin only.…”

Section: Resultsmentioning

confidence: 99%

“…Based on this observation, it is possible to make the wet‐milled lignin particles to disperse in PP matrix evenly without aggregation by treating the lignin particle surfaces properly prior to drying. This work has been studied carefully in our group and the results are published in a separate paper . SEM images could further reveal information on the interface between lignin and PP.…”

Section: Resultsmentioning

confidence: 99%

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Controlling lignin particle size for polymer blend applications

Miao

Hamad

2016

J of Applied Polymer Sci

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Softwood lignin produced by the LignoForce SystemTM was physically processed using different milling approaches to ascertain effective and scalable means to yield micro to submicron particles of controllable and uniform size. Our work suggests that wet ball‐milling using a small milling medium is the most reliable method in terms of processing efficiency and particle‐size controllability. Controllable particle size reduction would permit lignin to be used as an effective filler in polymer blends. We show that wet‐milled lignin could, subsequently, be oven‐ or spray‐dried, and, subsequently, blended with, for instance, polypropylene (PP) through co‐extrusion. The spray‐drying method produced spherical lignin aggregates smaller and more uniform than oven‐dried ones. As a consequence, spray‐dried lignin demonstrated a more uniform distribution within the polymer melt, leading to noticeable improvement in the strain—or flexibility—of the lignin‐PP polymer blends. Furthermore, it is confirmed that the investigated drying methods had no effect on the thermal stability of the resulting lignin‐PP blends. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44669.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Controlling lignin particle size for polymer blend applications

Miao

Hamad

2016

J of Applied Polymer Sci

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“…Among many researches combining natural biodegradable additives are lignin, starch, and so on into PP polymer to form composites. Those composites are not completely biodegradable but are partly environment‐friendly . Meanwhile, natural biodegradable additives are potential reinforcements for polymer composites for their low density and high specific modulus and strength.…”

Section: Introductionmentioning

confidence: 99%

“…Those composites are not completely biodegradable but are partly environment-friendly. [3][4][5][6] Meanwhile, natural biodegradable additives are potential reinforcements for polymer composites for their low density and high specific modulus and strength.…”

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confidence: 99%

Studies on intumescent flame retardant polypropylene composites based on biodegradable wheat straw

Nie

Pan

et al. 2018

Fire and Materials

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Summary Wheat straw (WS) has numerous advantages compared with traditional bioadditives such as starch and lignin. So in this work, based on WS and silica microencapsulated ammonium polyphosphate, flame retardant polypropylene/wheat straw (WSP) composites were prepared by melted blend method. Flame retardant and thermal properties of WSP composites have been investigated. The results of cone calorimeter show that peaks of heat release rate and total heat release of the flame retardant WSP composite decrease substantially compared with those of pure polypropylene. The peak of heat release rate value of the flame retardant WSP composite decreases from 1290.5 to 247.9 kW/m2, and the total heat release value decreases from 119.4 to 46.3 MJ/m2. Meanwhile, thermal degradation and gas products of the flame retardant WSP composite were monitored by thermogravimetric analysis and thermogravimetric analysis‐infrared spectrometry. The result of thermal analysis shows that the flame retardant WSP composite has a high thermal stability and has a 30.0 wt% residual char at 600°C. From this work, we hope to provide a method to prepare flame retardant polymer composites with a biodegradable natural material‐WS.

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“…Nowadays, petrochemical resources crisis has become an important factor affecting the sustainable development . Among three basic types of materials, polymers have the greatest dependence on the petrochemical industry compared to metals and ceramics, and thus face the biggest challenge and urgency.…”

Section: Introductionmentioning

confidence: 99%

Building and origin of bio‐based bismaleimide resins with good processability, high thermal, and mechanical properties

Ge¹,

Miao²,

Yuan³

et al. 2017

J of Applied Polymer Sci

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Bio‐based high performance thermosetting resins have been urgently required by cutting‐edge fields for meeting sustainable development. A new kind of high performance thermosetting resins (BA‐n) with good processability, high thermal resistance, and mechanical properties was developed based on 4,4′‐bismaleimidodiphenylmethane (BDM) and renewable bis(5‐allyloxy)‐4‐methoxy‐2‐methylphenyl)methane (ABE) from bio‐based lignin derivative. The effect of the molar ratio of allyl to imide (n) on structures and properties of BA resins were systematically researched. BA‐n resins have much better processability, thermal, and mechanical properties than their petroleum‐based counterparts, 2,2′‐diallylbisphenol A‐modified BDM (BD‐n) resins. Compared with BD‐0.86, the best available bismaleimide (BMI) resin, BA‐0.86 not only has 6 h longer process window and 13.7 °C higher glass transition temperature, but also owns the highest flexural strength and modulus among all bio‐based allyl compound‐modified BMI resins reported. The origin behind these attractive performances of BA resins is revealed by discussing the unique crosslinked structure. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45947.

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Surface modification of lignin for applications in polypropylene blends

Cited by 37 publications

References 35 publications

Controlling lignin particle size for polymer blend applications

Controlling lignin particle size for polymer blend applications

Studies on intumescent flame retardant polypropylene composites based on biodegradable wheat straw

Building and origin of bio‐based bismaleimide resins with good processability, high thermal, and mechanical properties

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