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California bill would force ISPs to offer 100Mbps plans for $15 a month
Like New York law, Calif. bill demands cheap plans for people with low incomes.
The best MagSafe and Qi2 chargers
Wireless charging is less efficient than plugging in a wire, but it’s certainly convenient — especially when you add magnets. Most people who have an iPhone 12 or later (except the 16E) and want a magnetic charger should get a Qi2 charger. Any Qi2-certified charger will charge a MagSafe iPhone up to 15W — just […]
[讨论] 花男因为一个重大bug导致选取率直线上升
可以把队友拉去某个让台子只能升高一半的地方然后把队友卡在里面不能动弹
[杂谈]感觉新英雄枪男玩绝对超标
对脆皮压制力太强了 次要威能还带减速能恶心狗位 位移又多又快 大招也快 这后排以后更难活了[s:a2:中枪]
Drama over quantum computing’s future heats up
On March 18th, Chetan Nayak, a physicist leading Microsoft’s quantum team, presented new data on the company’s quantum computing chip at the American Physical Society’s Global Physics Summit in Anaheim, California. It was meant to calm a raging debate among physicists, but researchers remain skeptical of the results. “I never felt like there would be […]
The best iPad deals you can get
While the best iPad deals usually land during major sale events like Black Friday and Amazon Prime Day, many great iPad deals are attainable outside those times. The day-to-day discounts may come and go like changing winds, but there’s often something to be saved, particularly on the more affordable iPads. The most recent iPad Pro and iPad […]
Watch this ultra-detailed animation of the seafloor
The world has a more detailed map of the seafloor than ever before thanks to observations taken from space. NASA published a video this week showing a remarkably clear picture of the bottom of the ocean made possible thanks to new satellite technology. The face of the moon has been more thoroughly mapped than the […]
原油残渣或可在制造低成本碳纤维过程中发挥作用
我们所知的碳纤维复合材料通常由编织碳纤维与环氧粘合剂组成。当然，这种材料往往很昂贵。这是因为聚丙烯腈（一种通常用于纺成纤维的前体化学品）本身就相当昂贵。因此，科学家们一直在寻找更具成本效益的碳纤维来源。
原油加工后会剩下许多脏兮兮的副产品。一项新研究表明，其中几种物质可用于制造低成本碳纤维，进而可用于制造成本更低的碳纤维复合材料。
之前考虑过的一种候选物质是被称为沥青质的分子物质。它们是原油的成分，在精炼过程中从原油中分离出来。从名字就可以看出，它们用于生产沥青，以及其他用途。
它们也可以纺成碳纤维，尽管这种纤维容易断裂。在纺丝过程的最后热处理步骤（其中沥青质纤维被碳化）之后，纤维产量也相对较低。
考虑到这些缺点，沙特阿拉伯阿卜杜拉国王科技大学 (KAUST) 的 Mani Sarathy 教授及其同事最近研究了另一种原油加工副产品——树脂。
Sarathy 实验室的研究员 Edwin Guevara Romero 表示：“之前对石油残渣的研究表明，树脂可以稳定沥青质分子，凸显了其强大的分子亲和力。这让我们推测，将沥青质与树脂混合可以产生用于碳纤维生产的协同原料。”
实验室测试发现，这种沥青质-树脂混合物的流动性比单独的沥青质更好，因此可以在更低、更节能的温度下纺丝。碳化后，纤维也不易断裂，性能与现有的中高强度各向同性碳纤维相似。
另外，收集沥青质和树脂可以使剩余的原油加工残余物更容易处理。
Sarathy 表示：“传统上，石油残渣一直用于道路铺设等非常低价值的用途。通过提取最重的沥青质和树脂用于高价值碳纤维制造，剩余的残油也可以更容易地加工成更清洁的燃料或有价值的小分子，从而进一步提高该工艺的经济性。”
有关该研究的论文最近发表在《燃料》杂志上。
Google will let you make AI podcasts from Gemini’s Deep Research
Google’s Gemini app now lets you generate Audio Overviews based on Deep Research. That means you can turn the in-depth reports generated by Gemini into a conversational podcast featuring two AI “hosts.” Since launching Audio Overviews within its AI note-taking app NotebookLM last September, Google has been steadily adding to the feature by letting you […]