Gallium-catalyzed recycling of silicone waste with boron trichloride to yield key chlorosilanes

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2025-04-24 DOI:10.1126/science.adv0919

Nam Đức Vũ, Aurélie Boulegue-Mondière, Nicolas Durand, Joséphine Munsch, Mickaël Boste, Rudy Lhermet, David Gajan, Anne Baudouin, Steven Roldán-Gómez, Marie-Eve L. Perrin, Vincent Monteil, Jean Raynaud

引用次数: 0

Abstract

Chemical recycling to monomers is a key strategy for a sustainable circular polymer economy. However, most efforts have focused on polymers with carbon backbones. Recycling of silicone polymers and corresponding materials, featuring a robust inorganic backbone and tunable properties, remains in its infancy. We present a general method for depolymerization of a very wide range of silicone-based materials and postconsumer waste, including end-of-life cross-linked polydimethylsiloxane-based networks within formulated materials. The reaction proceeds at 40°C, harnessing an efficient gallium catalyst for a million-fold rate enhancement and boron trichloride as the chlorine source, to produce nearly quantitative yields of (methyl)chlorosilanes, key intermediates in the Müller-Rochow process that anchors the silicone industry.

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镓催化三氯化硼回收有机硅废料制备关键氯硅烷

化学回收单体是可持续循环聚合物经济的关键战略。然而，大多数努力都集中在具有碳骨架的聚合物上。有机硅聚合物和相应材料的回收利用，具有强大的无机骨架和可调性能，仍处于起步阶段。我们提出了一种通用的解聚方法，用于广泛的硅基材料和消费后废物，包括在配方材料中使用寿命结束的交联聚二甲基硅氧烷基网络。该反应在40°C下进行，利用一种高效的镓催化剂将速度提高一百万倍，并利用三氯化硼作为氯源，生产出几乎定量的（甲基）氯硅烷，甲基氯硅烷是支撑硅工业的勒-罗chow工艺的关键中间体。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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