1成果簡(jiǎn)介

　　弱界面粘附仍是實(shí)現(xiàn)棉質(zhì)功能性紡織品持久導(dǎo)電性的主要障礙。本文，山東理工大學(xué)韓祥生、Yinghong Xu等研究人員在《Chemical Engineering Journal》期刊發(fā)表名為“One-step lignin-mediated co-assembly of graphene oxide on cotton fabrics for durable conductive and photothermal applications”的論文，研究提出一種可持續(xù)且簡(jiǎn)便的一步法策略，利用硫酸鹽木質(zhì)素（KL）的固有粘附性在棉纖維表面構(gòu)建穩(wěn)定導(dǎo)電層。

　　將棉織物浸入KL/氧化石墨烯（GO）分散液中，經(jīng)堿誘導(dǎo)凝固與原位化學(xué)還原處理，實(shí)現(xiàn)KL與GO在纖維表面的協(xié)同組裝。改性棉織物((GxLy)z@CF)展現(xiàn)出高電導(dǎo)率（達(dá)~7.5 S/m）與卓越的機(jī)械耐久性，經(jīng)反復(fù)彎曲（500次）、磨損（5000次）及洗滌（45分鐘）測(cè)試后，其電阻變化ΔR/R?始終小于3.2。優(yōu)異的導(dǎo)電性與穩(wěn)定性使(GxLy)z@CF有望作為表皮傳感器用于人體動(dòng)作檢測(cè)。此外，(GxLy)z@CF還展現(xiàn)出卓越的光熱轉(zhuǎn)換能力，在模擬太陽輻射（1000 W·m?2）照射下，表面溫度可在300秒內(nèi)快速升至約75°C。這種木質(zhì)素介導(dǎo)的組裝體系為開發(fā)持久導(dǎo)電紡織品提供了可持續(xù)路徑，有望應(yīng)用于可穿戴傳感與光熱轉(zhuǎn)換領(lǐng)域。

2圖文導(dǎo)讀

　　圖1. Schematic illustration of the synthesis and application of (GxLy)z@CF fabrics.

　　圖2. (A-B) SEM image (A) and digital photograph (B) of CF. (C-E) Digital photograph (C) and SEM images (D-E) of (G2L1)1.2@CF. (F-G) Raman spectra of CF, (G2L1)1.2@CF and rGO: (F) 1250–1750 cm?1 and (G) enlarged region of 1500–1650 cm?1. (H-K) XPS O1s spectra of CF (H), GO (I), KL (J) and (G2L1)1.2@CF (K). (L) Schematic illustration of the potential co-assembly of KL and GO on the surfaces of CF.

　　圖3.Durability of (G?L?)?.?@CF and G?.4@CF under different mechanical treatments.

　　圖4. (A) Schematic illustration of the wearable sensing and photo-thermal conversion application of (G?L?)?.?@CF. (B-D) Real-time current variation of (G?L?)?.?@CF during (B) finger bending, (C) multi-angle finger bending, and (D) elbow bending. (E, F) Current variation during long-term finger bending: (E) overall response over 1500 s and (F) enlarged view from 200 to 400 s. (G) Real-time current variation of (G?L?)?.?@CF after 5000 abrasion cycles under finger bending. (H) Infrared thermal images of (G?L?)?.?@CF during 1000 W·m?2 illumination. (I) Steady-state temperatures of (G?L?)?.?@CF under different light intensities. (J) Steady-state temperatures of CF, G?.4@CF, and (G?L?)?.?@CF under 1000 W·m?2. (K) Temperature response of (G?L?)?.?@CF under on/off cycles at 1000 W·m?2. (L) Steady-state temperature of (G?L?)?.?@CF under 1000 W·m?2 after 45 min washing.

3小結(jié)

　　本研究提出一種簡(jiǎn)便策略，利用木質(zhì)素（KL）的固有粘附性促進(jìn)KL與導(dǎo)電氧化石墨烯（GO）在棉纖維表面的協(xié)同組裝，從而構(gòu)建出穩(wěn)定的導(dǎo)電棉纖維（(GxLy)z@CF）。硫酸木質(zhì)素通過氫鍵與π-π堆積等多重分子間作用，實(shí)現(xiàn)導(dǎo)電組分的牢固錨定，形成均勻且高度穩(wěn)定的導(dǎo)電層。所得(GxLy)z@CF展現(xiàn)出約7.5 S/m的高電導(dǎo)率，并在機(jī)械變形、磨損及反復(fù)洗滌循環(huán)中保持卓越耐久性（ΔR/R0 < 3.2）。功能評(píng)估表明，該復(fù)合材料可實(shí)時(shí)可靠監(jiān)測(cè)人體生理活動(dòng)（如關(guān)節(jié)彎曲與吞咽動(dòng)作），同時(shí)展現(xiàn)高效光熱轉(zhuǎn)換能力——在1000 W·m?2光照下溫度可達(dá)約75 °C。相較于傳統(tǒng)棉纖維表面改性方法，該一步法木質(zhì)素輔助工藝省去了復(fù)雜預(yù)處理步驟，為制備耐久導(dǎo)電紡織品提供了可持續(xù)、高效且環(huán)保的途徑。該策略在智能可穿戴電子設(shè)備及多功能紡織基器件領(lǐng)域展現(xiàn)出廣闊應(yīng)用前景。

　　文獻(xiàn)：
https://doi.org/10.1016/j.cej.2025.172229

　　來源 ：材料分析與應(yīng)用