Scientists develop new spacecraft outer protective materials

The academician team of Yu Shuhong, China University of Science and Technology, developed a new type of spacecraft outer protective material – polyimide-nano-macular composite film. This new material has been significantly improved due to its unique bionic design, and its mechanical properties and extreme environmental tolerance are significantly improved, which is expected to replace existing polyimide-based composite film materials. This results have been published in "Advanced Materials".

The polyimide film is a perfect material of the space detector "protective clothing" due to its excellent mechanical properties, excellent thermal stability and protruding chemical resistance. However, like other hydrocarbon polymers, the material is extremely susceptible to atomic oxygen attack in the space environment, causing its physical and mechanical properties to drop sharply, and there is currently no good solution. In addition, cosmic radiation and space debris impact also bring severe tests to their stability.

Yu Shuhong team is inspired by natural pearl mother’s "brick-mud" layered structure, using the pre-mechanical properties and ultraviolet mask function and can be prepared as a structural element, with polyimide precursor The polyimide-nanocomposite film is co-assembled, and the superior intrinsic characteristics of mica make up for the lack of polyimide. Different from the conventionally imitation pearl layer nanocomposite film, researchers have double-layer pearl layer structures by changing group distribution ratios, with a two-layer pearl layer structure, with a more dense nammother piece. This design strategy not only achieves effective improvement in material mechanical properties, but also facing atomic oxygen, ultraviolet radiation and spatial debris or the like.

Studies have shown that the tensile strength, Young’s modulus and surface hardness of this novel bionic composite film are 125 MPa, 2.2 Gpa and 0.37 GPpa, 45%, 100%, respectively, 100%, respectively, 100%, respectively, 100%, respectively, 100%, respectively, 100% And 68%, its performance is significantly better than the polyimide-mica composite film of the pure polyimide film, a single layer of pearl mother structure, and a polyimide-based composite containing conventional reports. In addition, its anti-ultraviolet aging and high temperature stability are also significantly improved.

The industry believes that this research proposed unique double imitation pearl mother structure design strategy, providing new ideas for designing other high-performance nanocomposites. (Guiyun An)

Another electricity supplier dark horse down! After 85 boss 60 million in debt on foot, was hailed as the next Qiang East

Like any human world as a field, the business community rise or fall, sometimes changing, the slightest help people.

Seeing 2021 will come to an end, but still as Babe Group as evidence of years, and no resurrection.

November 17, a man named "Lucky Koi Little Prince" of users in shellfish shop APP microblogging complaints Babe Group’s operations, said the software without human customer service still can not log out after operation, the account balance is cleared.

More than anger, the users also CA 12315 official blog. I wonder if he is really ill-informed to this message, or simply to vent their dissatisfaction, in fact, he encountered problems simply can not be solved.

As we all know, Tony had no employees in the APP store operations, not only that, the whole group babe, and now have disappeared, founder as early as August of this year the volume of money on foot, until now, the outside world have no news of him.

Since the second half of this year, many companies have exposed the foot of the founder of the message, before abx Xie Long, founder of English language training institutions to bring fiscal Yuandun, after the Babe’s founder Zhang Lianglun disappeared.

As we all know, Jerome foot is largely due to the Education and Training industry suffered heavy losses this year, may Zhang Lianglun why is it on foot?

If the time back a year, people can not see anyway babe group of building the dump.

This was founded in June 30, 2017 of "young company", with its vitality, development and growth in just a few years.

According to statistics, Babe Group had spent less than one hundred days, a record-breaking sales of a million records in its uphill walk of those years, such as "sold 8 million tons paper towels one day," " one day sell 140 grapefruit, "and so forth gimmick, but boarded the Chinese mobile Internet growth in the first list APP, we have made a very successful results.

In 2020 the country mired in epidemic prevention babe Group first time donated supplies to the medical staff, I set a good corporate image, also claimed successfully reversed the situation of poor sales of agricultural products, the use of online help with a cargo across the country open up the market for agricultural products.

How will 60 million debt overnight liar even been accused of it?

In August 2020, Tony shop "mine explosion" of news, many businesses find that their money could not be settled properly, children will fall from all over the country arrived in Hangzhou, stuck in Beibei Group Headquarters wanted an explanation, we chickens a mouth a duck mouth speak different local dialects, but only one common aspiration: money!

This is comparable to migrant workers collective account of this scene is enough to make everyone shocked, I did not expect more outrageous things yet to come.

Group founder Babe seeing this, he just refused to come out on foot directly to the people an explanation, dropped the huge group leave Cleveland, indeed, grateful merchants resented teeth itch.

Want to know the whole story babe group from birth to death, a man would have to mention, he is Zhang Lianglun – the founder of Babe Group.

And this young babe Group companies, its founder is also a 80, regarded as a new era of young entrepreneurs.

In 1985, Zhang Lianglun born in Sichuan, China, he grew up in the background under the reform and opening up, from small business sector has witnessed countless myths from scratch, also witnessed the rise of China’s electronic business platform.

Zhang Lianglun academic excellence, his 5-year-old started school graduate that year, just 23 years old.

After graduating high school student at Jilin University communication engineering, recommended for admission to college after graduating from Huazhong University of Science to continue their studies. While all the way to school, but in fact Zhang Lianglun business from the beginning has been a college campus.

Jilin University campus, Zhang Lianglun is known for the digital products agents, in order to save leaflets bring human losses, he made a simple website, their eleven of our products go on display for students to choose.

Zhang Lianglun did not start to focus on Internet business, he had done cram for postgraduate business groups, every day after school, he and his girlfriend with a bunch of small ads and paste barrels, each went to school bulletin boards, utility poles post, Mr Yu’s style great year.

With the understanding of the deeper communication engineering, Zhang Lianglun the more determined he does not like this profession, but rather interest in electricity providers, search engines, websites and other strong, so at the undergraduate level, he was a minor in business administration.

After graduation, Zhang Lianglun first into Alibaba work, he wanted to be called in this legendary company learned something of interest.

Inside Ali, Zhang Lianglun responsible for the relevant work Alibaba Wang Pu product lines, he was very clear that he is going to leave one day Ali platform, then also this time inside of Ali, he must figure out their business as soon as possible planning.

In 2011, Zhang Lianglun after careful consideration, decided to "rebate" as their business base point, though many people are not optimistic about this business, but he believes the rebate shopping guide from the field of money relatively recent, profit model is relatively clear, but there is still much room for improvement, if good personal gain, not necessarily a way to money.

Since then, Zhang Lianglun first founded meters fold network, which is backed by a rebate Ali website, by charging a sales commission rebate harvested commission merchant, returned to a part of the user, as part of income.

Although it is a small site, but as Zhang Lianglun said, this is money from the nearest links, plus Ali such a big platform, only 2011 double eleven day, give Taobao merchants who brought more than 50 million in sales in one fell swoop fame in the industry.

Later, Mi Refrigeration was given up by Zhang Lilun. In 2014, he founded Beibei.com and entered the maternal and child market. In this field, he met his Bole Xu Xin.

This woman who has a very powerful investment, looks at Zhang Lilun’s potential, she feels that in Zhang Lilun’s body, there is a very unique hard work. When watching him, Xu Xin thought about Liu Qiangdong.

Xu Xin, who thought of his eyes, refused to let such a very potential young man, soon, she decided to invest huge funds to Zhang Lilun’s Beibei net in the following year.

In 2015, the capital, New Treaso capital led by today, Combec.com completed the financing of Cere of 100 million US dollars.

In 2017, Zhang Lilun officially created the Beibei Group, launched the "Bayian App", this mobile phone app "is" everyone can open the store "as the concept, providing users with a platform to open the store, in all, is a free Mobile phone shop app.

After the Bayou launched, it grew up in just a few years to grow an e-commerce. In less than a year, Bayou won the title of "The fastest black horse app", the following year, the "one county and one product" plans to be "CCTV Finance" column, becoming the example of major e-commerce.

Bayou has created a good result of 100 million single-quarter sales. The peak moment of Bayou’s development in 2019. The total amount of its users exceeded 50 million.

From 2017 to 2019, Bei Shi received countless, in the eyes of the eyes, this is the new unicorn business.

This is the little peak of Zhang Lilun’s career, but standing in the peak of that year, he probably did not think that such a scenery will be destined in 2021.

two

A epidemic, affected the society of all walks of life, and the Beibei Group is also one of them.

After the Zhang Lilun running, the financial situation of the media replicate Beibei Group, in fact, in March 2020, the Beibei Group has begun to lay off a large quantity, and the number of people has more than 500 people.

Then, some merchants found that they did not pay on time in the shop of Bayou, but because the Bayou itself gave each business knocked time is inconsistent, this small range of unfamed incidents did not have the first time Cause everyone’s attention.

In fact, from 2019, there have been a business that the payment of Beige will be disordered. It used to be a 50-day decline in thunder, but it can be started from the second half of 2019, and the payment time began to become irregular. Follow.

When I gave a decline in May 2020, the Bayi customer service given the website in maintenance, the system has problems, but the next month, the payment is still unable to settle on time, which makes many business dumbs to eat Huang Lian – Quality Not.

Based on the trust in the Bayi, it is also based on the seasonal field when the Baybei Group is attended. Many merchants have chosen to wait. I didn’t expect this, I waited for the babe group layoff, arrears.

In August, the merchants also couldn’t sit again, assembled to the Bay Group Headquarters, raised the banner of the banner, shouting the slogan of the slogan, requiring Zhang Lianglun to give a statement.

I didn’t expect Zhang Lianglun without an appearance – running. Things have developed here, no longer an ordinary arrears, the merchants say that they are most disgusting is not arrears, but they can’t find people at all.

According to the "览 商业" report, Beibei Group has strengthened social e-commerce in 2020 regulators. The past multi-level distribution model is restricted, sales will begin to break the cliff, the monthly sales is only 5 million yuan, There are few more than one-third of the peak period in the past.

Based on this situation, Zhang Lilun has all the hope of cash back to the newly developed project in 2020 – Ximei.

This is a project for female groups, mainly to do female cosmetics, in order to do it, Zhang Lilun put into this top, do not hesitate to manure and material, it can be said that the entire Beibei Group is doing this project at the time.

When the media interviewed those who came to defend rights, they also mentioned this project, some said that in the eyes of the outside, the trend of Beibei Group, just like it is not done, don’t miss it. Ximei.

However, the Beibei Group did not pick up because of the launch of Ximei, but the word of mouth fell.

The "rebate" model is not as red as it just came out today, and the "everyone can open the store" Bayou, which is not completely free.

Every business business is enforced by the platform to consume at least what extent, and each single transaction can be achieved. There are very few commissions. This set of rebate distribution is found by people, Bayi and Ximei want It is not so easy to continue "circle" without burden.

Obviously, Si Mei finally did not give Zhang Lianglun’s rich return, but it became the last straw that was pulling the camel.

Its failure, let the Bay Group’s cash chains, according to the online Babe Group’s money, the Payré Group owes more than 600 merchants, only in the form, the amount has Up to 6 million.

Until August, the Government asked the Beibei Group to send a person in charge to handle the arrears. Zhang Lianglun still did not appear, and this disappeared, it had disappeared for more than three months, and there was no news.

In 2021, it was called "e-commerce agers". Many e-commerce platforms are "dead" in different levels. In the end, Bayi’s explosion is only a part of it.

The world is all the benefits, and the world is good. For business people, making money is the first estere, but as a businessman with a conscience, it will make money in the money, will also consider the interests of others.

Like Zhang Lilun’s moment, a businessman who has been in the event of a long time, and it is probably that countless "creditar" fled after him, it is enough to be permanently nailed in the shame.

It seems that even if there are countless investment success experience, Xu Xin is still in Zhang Lilun, turned the car here: Want to do the next Liu Qiangdong? At least now, this prediction is failed.