The Melt Flow Index (MFI) is a measure of the ease of flow of the melt of a thermoplastic polymer. It is defined as the mass of polymer, in grams, flowing in ten minutes through a capillary of a specific diameter and length by a pressure applied via prescribed alternative gravimetric weights for alternative prescribed temperatures.

2018年4月3日 · Thanks to the high-quality nanosized crystals, the as-prepared ZSM-5 catalysts exhibit superior performance in methanol-to-propylene (MTP) reactions, which deliver a prolonged lifetime of 54 h with a total light olefin selectivity of 74% and a high propylene selectivity of 49% at 470 °C at a high methanol weight hourly space velocity (WHSV) of 7...

2021年1月19日 · Herein, we develop a simple synthetic strategy toward reducing the thickness along the b-axis of MFI-type crystals, thus providing a short diffusion path along the straight channel. Our approach combines preliminary aging and …

2020年2月14日 · Here, a facile approach involving anisotropic etching with an aqueous solution of tetrapropylammonium hydroxide (TPAOH) was developed for preparing uniform high–aspect ratio hierarchical MFI nanosheets. In addition, the mechanism associated with the formation of MFI nanosheets was proposed.

2009年9月10日 · Here we show that appropriately designed bifunctional surfactants can direct the formation of zeolite structures on the mesoporous and microporous length scales simultaneously and thus yield MFI...

2024年7月5日 · In this work, we achieved facile synthesis of continuous b -oriented MFI zeolite films with few twins over a wide crystallization temperature range of 30–210 °C through adopting NH 4 F-mediated gel as nutrient during epitaxial growth.

2025年2月20日 · In this study, a bolaform surfactant, C 6 H 13 –N + (CH 3) 2 –C 6 H 12 –N + (CH 3) 2 –C 6 H 12 –O–C 6 H 4 –O–C 6 H 12 –N + (CH 3) 2 –C 6 H 12 –N + (CH 3) 2 –C 6 H 13 (BAM –6–6–6), was used to guide the synthesis of hierarchical MFI zeolite nanosheets (HMNs).

MFI沸石纳米片（NSs）不仅保留了微孔沸石固有的催化、吸附和择形特性，而且还具有缩短的直通道长度，增强了客体分子的进入和传输。 由于它们在催化应用和气体分离中的理想性能，它们已成为最有前途的纳米材料类型之一。 本文简要介绍了 MFI NS 的合成、结晶机制和催化应用，重点介绍了该领域的最新成就。 还涵盖了主要优点、挑战和未来的应用前景。

近日，浙江大学王正宝教授课题组设计了一种简单且有效的取向晶种层印刷技术，并且通过在合成体系中引入聚六亚甲基双胍盐酸盐（简化为phmb）作为孪晶抑制剂，成功地在多孔al 2 o 3 载体表面制备出b轴取向的mfi型分子筛分离膜（图1），并且膜在低浓度乙醇水 ...

Chem. Rev., 2023, 123, 6039 DOI: 10.1021/acs.chemrev.2c00315 Alkali-resistant catalytic reduction of NO over CeO2-WO3/MCM-22 supported catalyst by releasing Brønsted acid sites