Du, Jianjun
Zhu, Bowen
Peng, Xiaojun
Chen, Xiaodong
With increasing trends of global population growth, urbanization, pollution over-exploitation, and climate change, the safe water supply has become a global issue and is threatening our society in terms of sustainable development. Therefore, there is a growing need for a water-monitoring platform with the capability of rapidness, specifi city, low-cost, and robustness. This review summarizes the recent developments in the design and application of gold nanoparticles (AuNPs) based optical assays to detect contaminants in aqueous media with a high performance. First, a brief discussion on the correlation between the optical reading strategy and the optical properties of AuNPs is presented. Then, we summarize the principle behind AuNP-based optical assays to detect different contaminants, such as toxic metal ion, anion, and pesticides, according to different optical reading strategies: colorimetry, scattering, and fluorescence. Finally, the comparison of these assays and the outlook of AuNP-based optical detection are discussed.
A mildew-proof preservative paint, comprising the following components in percentage by weight: 20-60% resin, 30-70% solvent, 0.5-10% anti-mildew agent and 0.3-5% additive, wherein the resin is at least one of polyurethane, an acrylate copolymer, polyvinyl alcohol, polyvinylidene chloride, modified polyvinylidene chloride, an ethylene-vinyl acetate copolymer, a polyvinyl acetate copolymer, and a vinyl acetate-butyl ester copolymer, and the solvent is at least one of water and ethanol. The resin, the solvent and the additive are uniformly mixed to form a mixed liquid, and then the mixed liquid and the anti-mildew agent are uniformly mixed to obtain the paint. The paint is used to prepare mildew-proof preservative coatings.
A mildew-proof preservative film, comprising a base layer and a mildew-proof preservative coating provided on the base layer. The mildew-proof preservative coating is made from a mildew-proof preservative paint. The paint comprises the following components in percentage by weight: 20-60% of resin, 30-70% of solvent, 0.5-10% of mildew preventive, and 0.3-5% of additive. The resin is at least one of polyurethane, an acrylate copolymer, polyvinyl alcohol, polyvinylidene chloride, modified polyvinylidene chloride, an ethylene-vinyl acetate copolymer, a polyvinyl acetate copolymer, and a vinyl acetate-butyl ester copolymer; and the solvent is at least one of water and ethanol. A preparation method for the mildew-proof preservative film comprises the following steps: uniformly mixing the resin, the solvent, and the additive to obtain a mixed liquid; uniformly mixing the mixed liquid and mildew preventive to obtain a paint; then coating the base layer with the paint, and conducting heat treatment so that the paint forms a coating, so as to obtain the mildew-proof preservative film.
A mildew-proof preservative paper, comprising a paper-based layer, a decorative coating, and a mildew-proof preservative coating. The mildew-proof preservative coating is made from a mildew-proof preservative paint. The mildew-proof preservative paint comprises the following components in percentage by weight: 20-60% of resin, 30-70% of solvent, 0.5-10% of mildew preventive and 0.3-5% of additive. A preparation method for the mildew-proof preservative paper comprises: preparing the mildew-proof preservative paint; coating a surface of the paper-based layer with the mildew-proof preservative paint, and conducting heat treatment so that the mildew-proof preservative paint forms a mildew-proof preservative coating; coating the other surface of the paper-based layer with the raw material of the decorative coating and conducting heat treatment so that the raw material of the decorative coating form the decorative coating so as to obtain the mildew-proof preservative paper. A preparation device for preparing the mildew-proof preservative paper, comprising a mildew-proof preservative coating forming mechanism and a decorative coating forming mechanism.
A heat sink (1) with heat pipe comprises a heat pipe (11) and a base (12) supporting the
heat pipe (11). The heat pipe (11) comprises a heat-absorbing member (111) and
a heat-releasing member (112) flexurally connected to the heat-absorbing member
(111). A through groove (121) is provided in the base (12). The heat-absorbing member
(111) of the heat pipe (11) is held in the through groove (121) by pressing. The
base (12) of the heat sink (1) comprises multiple base plates (122) stacked and
fixed with each other.
Fluorescent probe compounds, preparation method and use thereof are provided, and said compounds are represented by the general formula I: wherein: each of R1, R2, R3 and R4 is individually selected from the group consisting of H, C1-18 alkyl, phenyl substituted by C1-18 alkyl, naphthyl substituted by C1-18 alkyl, halogen, OR9, N(R9)2, cyano, (CH2CH2O)nH, (CH2)mCOOH, and (CH2)mSO3M; each of R5, R6, R7 and R8 is individually selected from the group consisting of H, C1-18 alkyl, phenyl substituted by C1-18 alkyl, naphthyl substituted by C1-18 alkyl, halogen, hydroxyl, thiol, cyano, nitro, heterocyclic group, halogenated alkyl, alkylamino, amido, OR9, N(R9)2, (CH2CH2O)nH, (CH2)mCOOH, and (CH2)mSO3M; R9 represents H, C1-18 alkyl, phenyl substituted by C1-18 alkyl, naphthyl substituted by C1-18 alkyl, halogen, cyano, (CH2CH2O)nH, (CH2)mCOOH, or (CH2)mSO3M; n and m each individually represent integer of 0-18; M represents H, K, Na, Li, NH4, NH3R10, NH2(R10)2, NH(R10)3, or N(R10)4; and R10 represents H, C1-6 alkyl or CH2CH2OH. The compounds are useful for detecting mercury ion.
A heat pipe radiator (1) and manufacturing method thereof are disclosed. The heat
pipe radiator (1) comprises a heat pipe (11) and a base (12) supporting the heat
pipe (11). The heat pipe (11) has a heat absorbing portion (111) and a heat radiating
portion (112) connected to the heat absorbing portion (111) by bending. A groove
(121) is arranged on one side of the base (12). The heat absorbing portion (111)
of the heat pipe (11) is clamped in the groove (121) by extruding.
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